Recent recommendations suggest 60 minutes of physical activity per day. A sample of 50 adults in a study of cardiovascular risk factors report exercising a mean of 38 minutes per day with a standrad deviation of 19 minutes. Based on the sample data, is the physical activity significantly less tjam recommended? Run the appropriate test at a 5% level of significance.

Q: What percentage of fire station response times are under 3 minutes

A: Let X denote the response times for fire departments. Given that X follows N(mean = 4.5, SD = 1.2),…

Q: Recent Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested…

A: Given that Mean(µ) = 24.8 Standard deviations (σ) = 6.2

Q: Almost all medical schools in the United States require applicants to take the Medical College…

A:

Q: (a) Construct a 99.8% confidence interval for the difference in mean weight loss between the…

A: Let  be the population mean weight loss between the low-carb and low-fat diets.Given that,

Q: Medical research suggests that systolic blood pressure in adults is approximately normally…

A: Denote X as the blood pressure in adults. It is given that X is approximately normally distributed,…

Q: The number of chocolate chips in an​ 18-ounce bag of chocolate chip cookies is approximately…

A:

Q: Hospital waiting room times are normally distributed with a mean of 38.12 minutes and a standard…

A: From the provided information, Mean (µ) = 38.12 minutes Standard deviation (σ) = 8.63 minutes X~N…

Q: Response time is an important statistic for measuring the effectiveness of a fire department, and is…

A: Using stardization of Normal distribution

Q: a certain country the heights of adult men are normally distributed with a mean of 66.4 inches and a…

A: According to the given information in this questionWe need to find the what percentage of this​…

Q: The drive distance (in yards) for professional golfers is normally distributed with a mean of 308.04…

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: Weights of walleye in a lake are normally distributed with mean 4.8 and a standard deviation of 1.3…

A: From the provided information, Mean (µ) = 4.8 pounds Standard deviation (σ) = 1.3 pounds Let X be a…

Q: Entrance exam scores at Cititon University are normally distributed with a mean of 202 and a…

A:

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Given that Mean = 6.9 and Standard deviation = 1.5 Formula z = (x - mean)/ SD

Q: A researcher measures the lengths of 3-year-old yellow perch in a fish hatchery and finds that they…

A: From the provided information, Mean (µ) = 17.2 Standard deviation (σ) = 3.4 X~N (17.2, 3.4)

Q: dult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given: μ=69.0σ=2.8X=59.2

Q: o= $1000. a. State the null and alternative hypotheses. Ho: 4- Select your answer V3472 H: A- Select…

A: Given : Population mean =$3472 Population standard deviation =$1000

Q: Many cheeses are produced in the shape of a wheel. Because of the differences in consistency between…

A: The hypotheses are given below: Null hypothesis: H0: µ1 = µ2 Alternative hypothesis: HA: µ1 ≠ µ2…

Q: The heights of a pediatricians three-year-old females are approximately normally distributed, with…

A:

Q: Disney has studied its movie customers to determine how much money they spend on their movies. The…

A:

Q: The cost of repairing a smart phone that is out of warranty follows a normal distribution with a…

A: Given that, The cost of repairing a smart phone that is out of warranty follows a normal…

Q: In a study entitled How Undergraduate Students Use Credit Cards, it was reported that undergraduate…

A: Given that, sample size n=100 sample mean credit card balance x¯=3506 Population standard deviation…

Q: Shoe sizes among adult males are normally distributed with mean 9.2 and standard deviation 2.6…

A:

Q: Measurement of head circumference is closely tracked in pediatric medicine.  Microcephaly (defined…

A: For testing the single mean,   If the population standard deviation is known, then the z test is…

Q: Using traditional methods, it takes 9.0 hours to receive a basic flying license. A new license…

A: Given information- Hypothesized mean µ = 9.0 hours Sample size (n) = 17 Mean x̅ = 9.2 hours Standard…

Q: A prize winning crop of celery has an approximate normal distribution with a mean length of 15…

A:

Q: Mens' heights are normally distrubted with a mean of 68.3 inches and a standard deviation of 2.7.…

A:

Q: Scores on a standardized exam are known to follow a normal distribution. A researcher estimates the…

A: A confidence interval of population mean, µ, in terms of sample mean and margin of error, can be…

Q: Reports on a student's ACT, SAT, or MCAT usually give the percentile as well as the actual score.…

A: Given that.   X~N( μ , ?)   μ=528     , ?=117   Z-score =( x - μ )/?

Q: We wish to design a study to assess risk factors for stroke and dementia. There are two primary…

A: To determine the required sample size for your study, we need to consider both outcome measures…

Q: Do people who exercise regularly have a cholesterol level less than the recommended level of 140? A…

A: The summary of statistics is,

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Given Let X : The average hours of sleep on a weeknight mean = μ= 6.9  standard deviation = σ= 1.5…

Q: Students took a college math placement exam with a mean of 200 and a standard deviation of 12. Using…

A: Given that, μ=200σ=12

Q: Suppose the average golfer drives the ball around 259.1 yards with a standard deviation of 9.73.…

A: Solution

Q: If a P-value is .043, what does that mean in terms of the value obtained for the test statistic?

A: p-value is the probability of obtaining more extreme results under  null hypothesis, by more extreme…

Q: In a recent study, the Center for Disease Control reported that diastolic blood pressure (in mmHg)…

A:

Q: Consider a dataset with standard deviation 2, mean 6.2, and a total of 186 data points. What is the…

A: The given data is - Standard deviation (σ)=2 Mean(x)=6.2 Sample size(n)=186

Q: Exercise: Medical researchers conducted a study to determine whether treadmill exercise could…

A:

Q: A weight loss clinic with 250 clients reported an annual mean loss of 24.5 pounds with a standard…

A: The objective of this question is to construct a 95% confidence interval for the true population…

Q: A grocery store's sales experience indicates that its daily apple sales follow a normal distri-…

A: (b) Obtain the cut off point for the top 10% of all daily apple sales. The cut off point for the top…

Q: when designing aircraft cabins, what ceiling height will alow 98% of men to stand without bumping…

A:

Q: Entrance exam scores at Cititon University are normally distributed with a mean of 310 and a…

A:

Q: The heights of English men are normally distributed with a mean of 69.2 inches and a standard…

A: given mean  (μ= 69.2 )   standard deviation(σ)  = 4      z= (x-μ)/σ p(x<57.2) =P((x-μ)/σ  <…

Q: Students took a college math placement exam with a mean of 200 and a standard deviation of 12. Using…

A:

Q: The National Collegiate Athletic Association (NCAA) requires Division I athletes to score at least…

A:

Q: In a certain country the heights of adult men are normally distributed with a mean of 68.8 inches…

A: Suppose the random variable x defines the height of adult men.

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.