Example:  You would like to construct a 90% confidence interval for the proportion of graduating seniors that go directly on to graduate school.  You randomly sample 386 graduating seniors and find that 73 will be enrolling in graduate school in the upcoming semester.  1. What is your point estimate? 2. Construct a 90% confidence interval for the true proportion of graduating seniors that go directly on to graduate school? 3.How many graduating seniors will you have to sample to have a margin of error within 2%?

Q: Suppose you want to produce an estimate on the percent of students who return to college after their…

A:

Q: When constructing a confidence interval, if we construct a confidence interval with a 95% confidence…

A: The general formula for the width of the confidence interval is,

Q: Construct a 99.8% confidence interval for the proportion of women who work at home who are college…

A: Given,n=519x=165p^=xnp^=165519=0.318The point estimation for the proportion is 0.318 .

Q: 132,000 189,000 270,000 324,800 269,000 340,000 222,000 135,000 169,900 310,000 142,900 86,000…

A: Given information: x 132000 324800 222000 310000 285000 189000 269000 135000…

Q: pretty sure is in your interval? 1. 90% of the sample data. II. 90% of all sample proportions. III.…

A: Construct 90% Confidence interval for population proportion p

Q: 1. A survey of 224 children of ages 9 to 17 was conducted shortly after 1986 space-shuttle disaster.…

A:

Q: 9s

A: Margin of error =E =5%=0.05 90% confidence level

Q: 14. Direct Mail A survey shows that 51% of adults prefer to receive advertisements through the mail.…

A: Given percent of adults prefer to receive advertisements through the mail=51%Margin of error(E)=5.2%

Q: The percentage of high school graduates applying to multiple colleges has been increasing over the…

A: According to the given information,Population proportion, p = 34% = 0.34Sample size, n = 368Number…

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A:

Q: Exercise 2 Problem 12 12 Information. You are given the data in the table on the right 21 19…

A: Solution Here is two different questions I am solving exercise 2

Q: 13. This summer, when I was doing gardening, I got some seeds. The packet with seeds said that 95%…

A:

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: 10. You want to estimate the proportion of all college students who traveled during spring break.…

A: Let X be the number of students reported travelling during spring break and n be the sample size.…

Q: 10. You take a sample of 200 University of Maryland students and find that 80 them think that the…

A: 10. It was stated that a sample of 200 Maryland University students are taken. It was given that…

Q: 5-Seventy percent of 50 randomly selected students from college of science and engineering were…

A:

Q: You are interested in finding a 98% confidence interval for the average commute that non-residential…

A: Given27,27,9,26,9,26,19,18,17,25,24sample size(n)=11

Q: what will the margin of error be?  Choose the answer that is closest to what you calculate, and try…

A: We have given that  Favourable cases, X = 51 Sample size, n = 85 Sample proportion, p^ = X/n…

Q: The list below contains a number of statements about using confidence intervals of proportions.…

A: The objective is to find the true statement from the given list.

Q: 5. Still unconvinced, you calculate a 95% confidence interval to estimate the percentage of…

A: The objective of this question is to calculate a 95% confidence interval for the percentage of…

Q: 1. Online News In a Harris poll of 2036 adults, 40% said that they prefer to get their news online.…

A: Given that the sample size is n=2036 and sample proportion, p^=0.40. Confidence level=95%…

Q: You plan to construct a confidence interval for the population proportion p. In order to do so, you…

A: Correct answer is d. All of the above.

Q: You receive a brochure from a large university. The brochure indicates that the mean class size for​…

A: Sample size is, Population mean is Confidence Level is The objective is to test the claim that the…

Q: You want to estimate the proportion of current OSU students who were born outside of Ohio. You…

A: Given: n= 300 At 99.0 % confidence level , z score= 2.576 Need to find MARGIN OF ERROR for…

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given Data Sample Size, n = 1105 Number of successes, x = 491.0 confidence…

Q: An educator was trying to determine the effect of remote learning on middle school aged children.…

A: An educator was trying to determine the effect of remote learning onmiddle school aged children.…

Q: A marketing professor is conducting research on college student behaviors. She is interested in the…

A: It is given that, The 95% confidence interval for college students will graduate debt free would be…

Q: You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You…

A: Suppose p is the true population proportion of workforce has two or more jobs.

Q: According to a telephone survey of adults, 86% of homeowners said that owning a home was a good…

A: From the given information, According to a telephone survey of adults, 86% of homeowners said that…

Q: A recent survey of 349 people ages 18 to 29 found that 86% of them own a smartphone. Find the 99%…

A: The 99% confidence interval of the population proportion is obtained below as follows:   The formula…

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A: Solution

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.