A survey conducted by the American Automobile Association showed that a family of fourspends an average of $215.60 per day while on vacation. Suppose a sample of 64 familiesof four vacationing at Niagara Falls resulted in a sample mean of $252.45 per day and asample standard deviation of $74.50.a. Develop a 95% confidence interval estimate of the mean amount spent per day by afamily of four visiting Niagara Falls.b. based on the confidence interval from part (a), does it appear that the population meanamount spent per day by families visiting Niagara Falls differs from the mean reportedby the American Automobile Association? Explain.

Q: In a random sample of 60​ computers, the mean repair cost was​ $150 and assume that the population…

A: Given: In a random sample of 60​ computers, the mean repair cost was​ $150  the population…

Q: mpound and has built 16 tires and tested them to end-of-life in a road test. The sample san and…

A: Given n=16 Xbar=60139.7 S=3645.94 C=95%

Q: In a survey, 8 people were asked how much they spent on their child's last birthday gift. The…

A: The sample size, i.e., the sampled number of people, n=8.The sample mean, x¯=$37.The sample standard…

Q: 2. A study of recent graduates from your school reveals that for a accounting majors the mean salary…

A: Given that  Sample sizes n1=20 , n2=18 Sample mean s x1=30000 , x2=29000 s1=2000 , s2=1500

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: A sample of 22 public high school students spent an average of 6.5 hours studying per week. Assume…

A:

Q: In a transportation study of 27 large cities it was found that the number of motor vehicles per…

A: Given : Sample size (n) = 27 Sample mean (X¯) = one.34 i.e 1.34 Sample SD (S) = 0.46 Confidence…

Q: A report said that the average blood pressure is  130.71  for a sample of  37  white males aged  35…

A:

Q: In a random sample of 36 criminals convicted of a certain​ crime, it was determined that the mean…

A: Sample size (n) = 36 Mean x̅ = 69 Standard deviation (s) = 11 Significance level(α) = 1 - 0.90 =…

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: sample standard deviation of $74.50. a. Develop a  95% confidence interval estimate of the mean…

A: The sample size, i.e., the sampled number of families, n=64.The sample average spent amount(in $)…

Q: A random sample of 40 home theater systems has a mean price of $500 and a standard deviation of $60.…

A: Construct the 99% confidence interval for the population mean The 99% confidence interval for the…

Q: To study the perceptions of waiting time, a researcher conducted a survey of 100 prospective…

A: The provided information  x¯=5.2σ=1.2n=100α=0.10The critical value is zc=1.64  (from statistical…

Q: A sample of 50 employees is found to have a mean of $32474 and a standard deviation of $1334. A)…

A:

Q: 4. Compute the 90 % confidence interval of the mean salary of all math professors. A simple random…

A: Given that x¯=77550,σ=2750,n=36 Critical values: By using the z-tables, the critical value at 10%…

Q: A survey conducted by the American Automobile Association (AAA) showed that a family of four spends…

A: Given that: Population mean, μ=215.60 n = 64 x¯=252.45 s = 74.50

Q: A study was conducted to estimate hospital costs for accident victims who wore seat belts.…

A: It is given that Sample mean = 9155Sample standard deviation = 5635Sample size = 21Confidence level…

Q: A survey conducted by the American Automobile Association showed that a family of four spends an…

A: n=64x=252.45s=78.50

Q: 2. One-Way Airfares The average one-way airfare from Pittsburgh to Washington, D.C., is $236. A…

A: Given:μ = 236n = 20x = 210s = 42a = 0.02 Defining the hypotheses:H0: μ = 236H1: μ ≠ 236 Test…

Q: A survey of 1,917 cell phone users in May 2010 asked "on an average day, about how many cell phone…

A: #  Given,  n=1917     μ=13.10      &    σ=10.2a  standard  error=σn=10.21917=0.23296

Q: Kennedy High School reported that the mean score on an end of semester physics exam wass 508 with a…

A: Given, Mean score μ=508Standard deviation σ=121Sample size n=200

Q: In a test of the Atkins weight loss program, 27 individuals participated in a randomized trial with…

A: Since, you have asked multiple question, we will solve the first question for you. If you want any…

Q: In a sample of 56 tax returns filed by local hotel managers in a recent year, the taxable incomes…

A: Given: n=56 Mean= 41225 Standard deviation = 6112

Q: In a survey, 31 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: In a time-use study, twenty randomly selected managers spend a mean of 2.4 hours each day on…

A:

Q: A sample of 14 commuters in Chicago showed the average of the commuting times was 33.2 minutes. If…

A:

Q: A sample of 20 international students attending an urban U.S. university found that the average…

A: Suppose µ is the population mean monthly expense budget of the international students.

Q: or a sample of 121 that has a mean of 6540 and a standard deviation of 780, calculate the 90%…

A:

Q: Suppose a random sample of 28 customers shows an average transaction amount of $45, with a standard…

A: The sample size is 28 The sample mean is 45 The sample standard deviation is 12 We have to find the…

Q: 1a) Work Time Lost due to Accidents At a large company, the Director of Research found that the…

A: Since your question has multiple sub-parts, we will solve first three sub-parts for you. If you want…

Q: A professor administers a standardized math te st to his class of 6 5 students. The m ean score…

A: The information provided- n: 65 = number of students m: 145 s: 21 99% CI is to be found.

Q: In a survey, 29 people were asked how much they spent on their child's last birthday gift. The…

A: Answer  Given  Confidence interval CI = 80%   α=1-0.80    =0.2 sample size [n] =29  degree of…

Q: In a survey conducted by the Gallup Organization, 1100 adult Americans were asked how many hours…

A: The survey has been conducted in the Gallup organization,  1100 adult Americans and asked them that…

Q: In a survey, 23 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=23sample mean (x) = 31standard deviation (s) = 8α = 1-0.95=0.05α2=0.025degrees…

Q: In a survey, 13 people were asked how much they spent on their child's last birthday gift. The…

A: From the provided information, Sample size (n) = 13 Sample mean (x̄) = 50 Sample standard deviation…