d). Question a: What is the statistic (p-hat)? Question b: What is the confidence coefficient (z*) for a 95% confidence interval? Question c: What is the 95% confidence MOE?

Q: In a survey, 16 people were asked how much they spent on their child's last birthday gift. The…

A: Given that : n=16 Standard deviation =$13 Mean = $49 We have to calculate 99% Confidence level :

Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The…

A: Solution:

Q: Construct a 95% confidence interval for the proportion of people who performed any volunteer work…

A: It is given as Favourable cases, x = 517Sample size,, x = 517Confidence level = 95%

Q: The following summaries of statistical studies give a sample statistic and a margin error. Find the…

A: It was found that 36% of the Americans favor the law. The margin of error is 4% points.

Q: In a survey, 12 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of…

A: I have used Excel function = NORMSINV() for finding critical value

Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: For a sample of 120 businesses, the average profit they generate in a month is $54,000 with a…

A: We have given that,  Average or sample mean (x̄) = 54000, standard deviation (s) = 8800 and sample…

Q: Which of the following would result in the narrowest confidence interval? A. 80% confidence level…

A: The narrowest confidence interval will result from larger sample size and a smaller confidence…

Q: According to a past poll conducted of Lexington residents, 52% indicated support for a light rail…

A: Given, p^=0.52 n=400 α=1-0.95=0.05 As per z-distribution table, the critical value of z is obtained…

Q: In a survey, 32 people were asked how much they spent on their child's last birthday gift. The…

A: Given  sample size n=32 mean x¯=$33 standard deviation s=$12 confidence level =80%,…

Q: How important is it for a waiter or waitress to complement the customers' dinner selection. A waiter…

A: For customers that were not complemented The average tip was 16% so the proportion is p1⏞=0.16 The…

Q: A SURVEY WAS CONDUCTED IN 2010 AND 2020. THE 2010 RESULTS SUMMARIZED THE RESPONSI WHEREAS THE…

A: The given table is HEALTH ISSUE 2010 SURVEY 2020 SURVEY ATE RECOMMEND AMOUNT OF FIBROUS…

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: In a survey, 24 people were asked how much they spent on their child's last birthday gift. The…

A: From the available information, Sample size, n =24 Sample mean, x = 31 Sample standard deviation, s…

Q: ccording to a past poll conducted of Lexington residents, 52% indicated support for a light rail…

A: Given: Sample proportion p^=52%=0.52 Sample size (n) = 400

Q: igh school soccer league there are a total of 256 players.

A: Given that Total players in high school soccer league (n) = 256 players The mean height of the…

Q: Latasha is a waitress at Seventh Heaven Hamburgers. She wants to estimate the average amount each…

A:

Q: In a survey, 21 people were asked how much they spent on their child's last birthday gift. The…

A: A confidence interval is an interval that is used to estimate the unknown parameter. The lowest…

Q: In a survey, 21 people were asked how much they spent on their child's last birthday gift. The…

A: It is given that sample mean is 50 and standard deviation is 12.

Q: 3.1 Construct a 95% confidence interval for the proportion of South Africans who avoided fat in…

A: From given data we have : for 2010 survey sample size=n1=1250 Proportion (Avoided fat)=p^1=0.55 for…

Q: A SURVEY WAS CONDUCTED IN 2010 AND 2020. THE 2010 RESULTS SUMMARIZED THE RESPONSES OF 1250…

A: Confidence interval are used to measure the range where the population proportion lies. It is…

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: According to the provided information, Mean = 34 Standard deviation = 12 Significance level = 90%…

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: In a survey, 14 people were asked how much they spent on their child's last birthday gift. The…

A: See the handwritten solution

Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: In a survey, 20 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=20Mean(x)=50standard deviation(s)=19c=90%

Q: uppose you want to estimate the proportion of employed adults who would continue working if they won…

A: given data, sample proportion p^=0.59 2E=0.3E=0.32=1.5CI=0.99α=1-0.99=0.01we have to find out the…

Q: A sample of freshman takes a reading comprehension test and their scores are summarized below.…

A:

Q: In a survey, 25 people were asked how much they spent on their child's last birthday gift. The…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: In a survey, 32 people were asked how much they spent on their child's last birthday gift. The…

A: