A federal report indicated that 28% of children under age 6 live in poverty in Kentucky, an increase over previous years. How large a sample is needed to estimate the true proportion of children under age 6 living in poverty in Kentucky within 5% with 90% confidence? Round the intermediate calculations to three decimal places and round up your final answer to the next whole number.

Q: Find the z-score that cuts off 70% in the body on the right.

A:

Q: A consumer wanted to find out how accurate Siri (an Apple digital assistant) is, so he asked…

A: From the information, given that Where, X denotes the number of events n denotes the number of…

Q: 1980 alcohol consumption per capita in the United States? (Round to the nearest percent.)

A: Given: The data given is as follows Australia 9.7 Austria 11.1 Belgium 11.5 Canada 7.6…

Q: On five exams, Rachel has a mean score of 80 points. Her lowest score was 50.  If this score is…

A:

Q: b) Round your answers to the following questions to one decimal place. What percent of the survey…

A: Given Data : Cell Phone Owned Frequency Android smartphone 458 iPhone smartphone…

Q: researcher wishes to estimate the proportion of the adult population of the U.S. has sleep…

A: E=0.03 99% confidence interval for z=2.576 p=0.5

Q: What proportion of z scores lie between -3 and +3 in the height in inches data set

A: We have to calculate P(-3 < Z < 3)

Q: To the nearest tenth, what is the geometric mean of the following data set? 15, 25, 35, 40.

A: We have the given set of data we have to find the geometric mean   the given data is 15, 25, 35,…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: If someone has a diastolic blood pressure of 105, what percentile does this represent? The mean is…

A: Given:  Mean(μ)  = 85 Standard deviation (σ) =12

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: sample size n=?

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given that  there is no reasonable preliminary estimation for the population proportion. Let p=0.5…

Q: A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

A:

Q: the value of so that 92.3% of the data lies to the right of

A:

Q: Find the sample size required to estimate the percentage of statistics students who take their…

A: The margin of error (E) is 0.02. The confidence level is 0.95.

Q: What percent of our campus is female? The Statistical Abstract of the United States, 112th edition,…

A:

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: It is given that margin of error (E) is 0.02 and the confidence level is 80%.

Q: An economist predicts that in the next 50 years gas will be 0.02 based on the last 7 months of 2015.…

A: Introduction: It is required to identify the type of error that has been made in the conclusion.

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given Information:  Confidence level = 90% Error (e) = 0.035 (3.5%) z score at 90% confidence level…

Q: a sample to estimate a population proportion. At this point in time, you have no reasonable…

A: When we don't have any prior information about population proportion, we generally take it as 0.50.…

Q: 7. Nielsen Media has recently begun attempting to estimate the monthly text usage for cell phone…

A: Statistical inference is a branch of statistics that analyses the data of probability distribution.…

Q: In a psychology class, 40 students have a mean score of 89.5 on a test. Then 24 more students take…

A: Given,n1=40 , x¯1=89.5n2=24 , x¯2=78.3

Q: A hospital director is told that 57% of the emergency room visitors are insured. The director wants…

A: It is given that n =120 and x =60.

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.