A manager for Shopee wants to determine the current percentage of Filipino adults who now use the Internet. How many adults must be surveyed in order to be 95% confident that the sample percentage is in error by no more than three percentage points when: * A. In 2020 , 73% of adults used the internet  B. No know possible value of the proportion

Q: A random sample of 100 high school students was surveyed regarding their favorite subject. The…

A: State the hypotheses.

Q: Q12. If 150 households were surveyed out of which 120 households have internet fiber cable, then…

A: Given Data: x=150-120=30 n=150

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Two sample z test for proportions: Two sample z test for proportions is the hypothesis test to test…

Q: In a survey of 500 human resource professionals, 70% said that the appearance of a resume is very…

A: Use simple formula

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: How large a sample should be surveyed to estimate the true proportion of college students who surf…

A:

Q: 3. In a Gallup Pool, 52% of 1038 surveyed adults said that second hand smoke is "very harmful". What…

A: Following information is given:   Total number of people survey = 1038 Percentage of people who said…

Q: A recent survey by the U.S. Census Bureau determined that the median monthly housing rent was $637.…

A:

Q: What is the percentile for Colorado, where 10.1% of the residents are aged 65 and olde

A: From the stem plot, we can see that only 4 of the 50 states (7.0%,8.8%,9.8% and 10.0%) having…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: There are two independent samples which are Country B and Country C. We have to test whether the…

Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A:

Q: In a sample of 508 men who worked at home, 32% of them were college graduates. a.) Among the 508 men…

A:

Q: The owner of a local bar specializing in alternative music wanted to determine the average age of…

A: t 95% confidence level, the z value is 1.96 which can be obtained by using the standard normal…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: Martha Quinn is interested in the proportion of fast to slow songs she will play today.  She takes…

A: In this method of selection, each song have equal probability of getting selected and the selection…

Q: d. The managers of a local luxury hotel would like to set the hotel's average daily rate at the 75th…

A: Let P75 denote the 75th percentile i.e below which 75% of hotels rate are set.

Q: A telecommunications company conducted a survey about cell phone companies. Of 1800 randomly and…

A: given  x = 1275 preferred AT&T to Sprint n =Of 1800 randomly and independently selected people…

Q: A company took a survey about its new product. 7,200 people liked the new product and 800 people did…

A:

Q: A researcher wishes to estimate the proportion of corporate executives whose annual salary is over…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

Q: How many success in the sample? How many failures in the sample? ? What size sample does the…

A: Answer:-  Given, n=1800

Q: The scores on a statewide chemistry exam were normally distributed with ?=73.08 and ?=6. Gabriela…

A: Given data isMean(μ)=73.08standard deviation(σ)=6

Q: An event marketing executive thinks that the proportion of consumers who have seen his company’s…

A: In general terms, the larger the sample size n, the more precise of an estimate can be obtained of…

Q: A medical researcher wants to do a study on the proportion of knee replacement surgeries that result…

A:

Q: A researcher is interested in maximum-security inmates. She groups inmates by the type of crime…

A: Here, the stratified random sampling method was used. Because the whole population was divided into…

Q: A researcher wants to determine what proportion of all high school students plans to attend…

A: Obtain the critical value at 90% confidence level:It is given that the margin of error is 0.02. The…

Q: Students in a small statistics class were asked which was their dominant hand and if they were in a…

A: Given,   Right Left Total STEM, Yes 6 1 7 STEM, No 7…

Q: A politician is Interested in the proportion of voters in his district that think he is doing a good…

A: Given dataA politician is intrested in the proportion of voters in his district thet thinkhe us…

Q: A state legislator wishes to survey residents of her district to see what proportion of the…

A: Answer:-  Given, Margin of error=7%=0.07 Confidence level=0.90 Let P=0.5 ( as we don't have sample…

Q: A recent poll of 700 people who work indoors found that 280 smoke. If the researchers want to be 98%…

A:

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: (a) If the standard error of the mean is 10 for N = 12, what is the standard error of the mean for N…

A: The standard error of the sampling distribution of the sample means is given as follows:

Q: What is the 87.7 percentile of X~N(12,3)

A: Answer: Given that, X~N(12,3)

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: We have to test the claim that "the proportion of adults in Country C who favor building new nuclear…

Q: In the formula x±zol , the subscript l 2 refers to the area in the lower tail or upper tail of the…

A: We know that the 100(1-α)% confidence interval for the population mean μ is defined as below: x̅ ±…

Q: Below n is the sample size, p is the population proportion and ^p is the sample proportion.  n= 148…

A: Given, Below n is the sample size, p is the population proportion and P^ is the sample proportion.…

Q: Why must the sum of all fs in a sample equal N?

A: Every datum in a sample is assigned to a category/class depending on its value. For a given dataset,…

Q: Find the estimated standard error for the sample mean for n = 27 and SS= 3505. Round to the nearest…

A: We have given that  n = 27 and SS= 3505 The formula to find estimated standard error for the sample…

Q: What is the formula used to determine the proportion (P) of something in a sample population? ох in…

A: In proportion test estimate of the proportion is given as follows: p⏞=Xn Where X is number in the…

Q: The Canadian Chiropodists Society states that  36 % of women wear shoes that are too small for their…

A: GivenMargin of error(E)=0.02p^=0.36confidence interval = 98%

Q: mr. One researcher wants to estimate the proportion of MU students who are vegetarian, 6 answered…

A: Sample size is 30. There are 6 students are vegetarians. The hypotheses are given below: Null…

Q: According to the Humane Society, 33% of households in the United States own at least one cat. You…

A: From the given information p Value is 0.092. We want to interpret it.

Q: A box truck rental service offers trucks in multiple sizes for people who are moving. If a 10-foot…

A: We have, a box truck rental service offers trucks in multiple sizes for people who are moving such…

Q: Part asked to find the sample correlation coefficient

A: Correlation: By correlation we mean the association or interdependence between two variables. If two…

Q: A large group of college students was surveyed and the following information was obtained: 712 saw…

A: Let A is represented by Lady Gaga. B is represented by Arcade fire. And C s represented by Skrillex.…

Q: a. How many categories (K) are we working with? b. Calculate the sum of the squared percentages, or…

A: a. From given information, there are 7 categories. Therefore, the number of categories is (K) = 7…

Q: The scores on a statewide math exam were normally distributed with ?=74 and ?=8. What proportion of…

A: GivenMean(μ)=74standard deviation(σ)=8

Q: You would like to be 99.9 confident that your estimate is within 2% of the true population…

A: