6. A researcher wishes to estimate, 99% confidence, the proportion of college professors with laptop computers. Aprevious study shows that 49% of those interviewed had laptop computers. The researcher wishes to be accurate within 3% of the true proportion. Find the minimum sample size necessary.

Q: When the sample size is 15 and you are doing a t test, the number of degrees of freedom is 15. True…

A: Given that  Sample size n =15 Degree of freedom =df =n-1

Q: What sample size should be obtained if he wants to be within 4 percentage points with 95​%…

A: Given that the margin of error is 4 percentage points. That is, ME=4%=0.04 Confidence level =95% The…

Q: estimate how many people you would need to survey in order to estimate the percentage in your…

A: here given , Suppose you want to estimate the percentage of employees who want to work from home.…

Q: A researcher wants to estimate the proportion of electric car owners in Los Angeles County. The…

A: According to the given information, we havePopulation proportion, p = 10% = 0.10Margin of error, E =…

Q: How is a sample related to a​ population?

A: Population is set of all elements about which we want to know. While the sample is a part of such…

Q: There are 145 people who participate in a training about compassion, and their compassion scores are…

A: In paired t test, it is needed to check the significant difference between two variables of same…

Q: Consider a simple poll that is measuring the proportion of citizens that hold a particular political…

A:

Q: The following are Wechsler's IQ scores of students who took the IQ test under a very noisy…

A: Hypothesis test is an inference process to make conclusions about the population parameter such as…

Q: Would it be unusual for the sample mean to be less than 2 ?

A: Would it be unusual for the sample mean to be less than 2 ?

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: In a survey of 4061 ​adults, 738 say they have seen a ghost. Construct a​ 99% confidence interval…

A: In this question, it has been given that 738 people out of 4061 people have seen the ghost, we have…

Q: elevision sports commentator wants to estimate the proportion of Americans who follow professional…

A:

Q: To determine the proportion of Americans who support affirmative action policies for minorities and…

A: The objective is to define the sample size for estimating the true proportion of Americans, who…

Q: Dr Benjamin Shockely, a noted social Psychologist, surveyed 150 top executives and found that 42…

A:

Q: Explain the effect on the margin of error and hence the effect on the accuracy of estimating a…

A: Effect on margin of error: If the sample size increases, then the standard error of statistic…

Q: Construct a 95% confidence interval for the proportion of college students who say they own their…

A: Given : n=410 , X=155  , α=0.05 We want to find the 95% confidence interval for the proportion of…

Q: Construct 95% confidence for the population point estimate (sample proportion) which is given as…

A: Given  N=40, P=0.4  Level of significance=0.05

Q: What is the relationship between the mean of a population and the mean of its sampling distribution?

A:

Q: 2) Estimate the difference between the ages of male and female respondents with 95% confidence.

A: Given information:   Female Male Mean 47.15625 44.16667 Sum 1509 795 S.D 14.14923 19.87979…

Q: Find level of significance for 95% confidence level.

A: Given: Confidence level = 95% = 0.95

Q: talk about lou and your friends are at a sleepover you how potato chips are made and each pack has…

A: Given problem is :

Q: When 370 junior college students were surveyed, 145 said they have a passport.  Construct a 95%…

A: Zcrit = 1.96

Q: dermatologist wishes to estimate the proportion of young adults who apply sunscreen regularly before…

A: Given: Margin of error (E) = 0.03 Confidence level = 0.90 Assumed proportion p^=0.50

Q: Explain the effect on the margin of error and hence the effect on the accuracy of estimating a…

A: Effect on the margin of error: If the sample size decreases, then the standard error of statistic…