job placement director claim that the average starting salary for nurses is more than $24000. A sample of 32 nurses has mean of $24500 and standard deviation of $400. Is there any evidence to reject the director’s claim at α= 0.01?
Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and…
A: Suppose that the random variable x defines the weight of babies.
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A: Given:
Q: The score for a standardized reading test are found to be normally distributed with a mean of 300…
A: The area under continuous distribution curve represents the proportion of data. So the area between…
Q: Suppose babies bom after a gestation period of 32 to 35 weeks have a mean weight of 26000 grams and…
A: Babies born after a gestation period of 32 to 35 weeks have a mean weight of 2600 grams and a…
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, 4, of…
A: From the provided information, Confidence level = 95% Margin of error (E) = 5 Population standard…
Q: The mean of the commute time to work for a resident of a certain city is 27.8 minutes. Assume that…
A: Chebyshev's inequality: Chebyshev's rule is appropriate for any distribution. That is, Chebyshev's…
Q: Suppose that IQ’s of 1,200 applicants to a university are approximately normally distributed with a…
A:
Q: A life time of a certain brand of tires is approximately normally distributed with a mean of 42,500…
A: Given data, μ=42500σ=3200P(X>x)=0.881-P(Z<z)=0.88P(Z<z)=0.12P(Z<-1.175)=0.12z=-1.175
Q: random sample of 83 eighth grade students' scores on a national mathematics assessment test has a…
A: We have to test that if mean score is 275 or more
Q: Two pain relief drugs are being considered. Drug I has shown in the past to have a standard…
A: Critical value: Critical value is the cut off point that divides the acceptance and rejection region…
Q: The mean electrical energy consumption for Mr Triola’s home for the past two months is 2838 Kilowatt…
A: Given,μ=2838σ=504P(3342<X<3846)=?
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ , of…
A: given data population sd (σ) = 2595% ci for μ , E = 3 ; n = ?
Q: An investigator is interested in the wages of married couples. She knows that the hourly wages of…
A: Solution
Q: heights of adult women in the United States are normally distributed with a mean of 65 inches and a…
A: The z score can be calculated as: z=x-μσ The required z score that is associated with the top 10% or…
Q: Suppose babies born after a gestation period of 32 to 35 weeks have the mean weight of 2800 grams…
A: To determine which baby weights are more relative to the gestation period, for that it is needed to…
Q: Suppose that grade point averages of undergraduate students at one university have a bell-shaped…
A: According to the given information, we have Mean = 2.55 Standard deviation = 0.43 Given that the…
Q: Suppose babies bom after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and a…
A:
Q: If the average wait time is 12 minutes with a standard deviation of 3 minutes, determine the…
A: Given : Average wait time =12 minutes Standard deviation =3 minutes We have to calculate percentage…
Q: The time needed for university students to complete a quick math test follows a normal distribution…
A: The objective of this question is to perform a hypothesis test to determine whether the mean time to…
Q: V fall between - to 99 and to 9g because to 99 = The t-value of t= (Round to two decmal places as…
A:
Q: Suppose that 16 samples of pesticide concentrations in plants in Halifax are taken giving a sample…
A: Given,margin of error(E)=2standard deviation(σ)=5.3α=1-0.99=0.01α2=0.005Z0.005=2.58 (from…
Q: 10. A measure of the right atrial pressure (mm Hg) was made for cardiac patients who were given…
A: The appropriate test statistic to conclude the indifference between the mean right atrial pressure…
Q: 9. A recent study in a small city stated that the average age of robbery victims was 63.5 years. A…
A:
Q: A special diet is intended to reduce the cholesterol of patients at risk of heart disease. If the…
A: Given: n = 45 Sample mean = 192 Sample standard deviation s = 21.
Q: If asample has amean of 48 and a standard deviation of 3.2,what is the value in the set…
A:
Q: Suppose the mean pulse rate of college students is 68 beats per minute with a standard deviation of…
A:
Q: Suppose that in a random sample of 50 well water samples, conducted in particular region of Nova…
A: The sample mean is 0.013.
Q: random sample of 75 eighth-grade students score's on a national mathematics assessment test has a…
A: Given
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ , of…
A:
Q: 4. In a spelling contest, the mean mark of the 32 boys was 72 with the standard deviation of 8 while…
A:
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure,μ , of…
A: Given information Standard deviation (σ) = 27 mm hg Confidence level = 0.95
Q: 3. There were 50 Geography students who took GEO 211 with a mean score of 72.5 and a standard…
A: (a) Hypothesis: H0:μ1-μ2=0 H1:μ1-μ2≠0 Test statistic:…
Q: uppose that the quarterly sales levels among health care information systems companies are…
A: Suppose that the quarterly sales levels among health care information systems companies are…
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, µ, of…
A: Sample size determination is a crucial and the foremost stage before any statistical analysis, which…
Q: Suppose that that the average BMI of the patients at Beth Israel Deaconness Medical Center is 30…
A:
Q: A random sample of 46 adult coyotes in a region of northern Minnesota showed the average age to be…
A: The given sample size is 46, sample mean is 2.03, and sample standard deviation is 0.79. The…
Q: According to her doctor, Mrs. Aoki’s cholesterol level is higher than 15% of the females aged 50 and…
A: Mrs. Aoki's cholesterol level is higher than 15% of the females aged 50 and over.population mean is…
Q: 8. The mean life time of sample of 100 light bulbs produced by a company is computed to be 1570…
A:
Q: A firm knows from its past experience that its monthly average expenses (X) on advertisement are Rs…
A:
Q: Suppose the time of renting a bicycle for a customer in a bicycle rental shop is normally…
A:
Q: Among 157 patients ,the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27.…
A:
Q: For a certain type of light, the number of hours a bulb will burn before requiring replacement has a…
A: Given that, The value of k‘s are
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ , of…
A:
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A: Given,standard deviation(σ)=27margin of error(E)=5α=1-0.95=0.05α2=0.025Z0.025=1.960 (from…
Q: The mean of the commute time to work for a resident of a certain city is 28.3 minutes. Assume that…
A: A normal distribution can be visualized by looking at the curve below. X-axis shows Z score which is…
Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2500 grams and…
A: Given that the mean of the gestation period of 32 to 35 weeks is 2500 and standard deviation is 800.…
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A: The population mean systolic blood pressure is .It is needed to find the sample size with 99%…
Q: AAA claims that the mean speed of all cars on freeway 60 during some specific time on weekdays is…
A: Consider the given information:
Q1) A job placement director claim that the average starting salary for nurses is more than $24000. A
sample of 32 nurses has mean of $24500 and standard deviation of $400. Is there any evidence to reject
the director’s claim at α= 0.01?
Step by step
Solved in 2 steps with 2 images
- Suppose that a researcher is interested in estimating the mean systolic blood pressure, u, of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate u. Assuming that the standard deviation of the population of systolic blood pressures of executives of major corporations is 26 mm Hg, what is the minimum sample size needed for the researcher to be 99% confident that his estimate is within 4 mm Hg of u? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.)The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 117 and standard deviation of 26 . Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher. (a) Around what percentage of adults in the USA have stage 2 high blood pressure? Give your answer rounded to two decimal places. b) Stage 1 high BP is specified as systolic BP between 140 and 160. What percentage of adults in the US qualify for stage 1? Give your answer rounded to two decimal places. (c). Your doctor tells you you are in the 30th percentile (e.g. bottom 30%) for blood pressure among US adults. What is your systolic BP? Give your answer rounded to two decimal placeSuppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2800 grams and a standard deviation of 900 grams while babies born after a gestation period of 40 weeks have mean weight of 3400 grams and a standard deviation of 445 grams. If a 33-week gestation period baby weighs 2625 grams and a 41-week gestation period baby weighs 3225 grams, find the corresponding z-scores. Which baby weighs less relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively less? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) OA. The baby born in week 33 weighs relatively less since its z-score, OB. The baby born in week 33 weighs relatively less since its z-score, OC. The baby born in week 41 weighs relatively less since its z-score, OD. The baby born in week 41 weighs relatively less since its z-score, is smaller than the z-score of is larger than the z-score of is…
- Mr. Karim is the owner of Philips home appliance. Recently Mr. Karim observed a differencein the taka amount of sales between the men and women he employed as sales associates. Asample of 40 days revealed the men sold a mean of Tk.1400 worth of appliance per day. For asample of 50 days, the women sold a mean of Tk1500 worth of appliance per day. Assumethe population standard deviation for men is Tk200 and for women Tk250. At the 0.05significance level, can Mr. Karim conclude that the mean amount sold per day is larger for thewomen?O C. The baby born in week 41 weighs relatively less since its z-score, is larger than the z-score of for the baby born in week 32. O D. The baby born in week 32 weighs relatively less since its z-score, is smaller than the z-score of for the baby born in week 41.Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2600 grams and a standard deviation of 600 grams while babies born after a gestation period of 40 weeks have a mean weight of 2900 grams and a standard deviation of 440 grams. If a 35-week gestation period baby weighs 2775 grams and a 40-week gestation period baby weighs 3075 grams, find the corresponding z-scores. Which baby weighs more relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively more? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) A. The baby born in week 40 weighs relatively more since its z-score, is smaller than the z-score of for the baby born in week 35. B. The baby born in week 40 weighs relatively more since its z-score, is larger than the z-score of for the baby born in week 35. O C. The baby born in week 35 weighs relatively more since its z-score, is larger…
- Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate μ. Assuming that the standard deviation of the population of systolic blood pressures of executives of major corporations is 26mm Hg, what is the minimum sample size needed for the researcher to be 95% confident that his estimate is within 5mm Hg of μ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015 for Hispanic females was 84.3 years. Assume that the standard deviation was 15 years, as suggested by the Bureau of Economic Research. The distribution of age at death,X, is not normal because it is skewed to the left. Nevertheless, the distribution of the mean x¯, in all possible samples of size ? is approximately normal if ? is large enough, by the central limit theorem. Let x¯ be the mean life expectancy in a sample of 100 Hispanic females. Determine the interval centered at the population mean ? such that 95% of sample means x¯ will fall in the interval. Give your answers precise to one decimal.Suppose that the quarterly sales levels among health care information systems companies are approximately normally distributed with a mean of 8vmillion dollars and a standard deviation of 1.1million dollars. One health care information systems company considers a quarter a "failure" if its sales level that quarter is in the bottom 15%of all quarterly sales levels. Determine the sales level (in millions of dollars) that is the cutoff between quarters that are considered "failures" by that company and quarters that are not. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
- An advertising agency that serves a major radio station wants to estimate the mean amount of time that the station’s audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes. What sample size is needed if the agency wants to be 99% confident of being correct to within ±5 minutes?Q2) A certain machine makes electrical resistors having a mean resistance of 60 ohms and a standard deviation of 2 ohms. Assuming that the resistance follows a normal distribution and can be measured to any degree of accuracy, what percentage of resistors will have a resistance exceeding 63 ohms?
