A weatherman stated that the average temperature during July in Chattanooga is 80 degrees. A sample of 32 Julys is taken to test the weatherman's statement and a sample mean of 84 degrees and sample standard deviation of 9) were observed. Assuming a student wants to perform a two-sided alternative test of hypothesis, answer the following; Calculate the 95% Confidence Interval for this test and interpret

Q: A random sample of 64 business students required an average of 100 minutes to complete a statistics…

A: Given that, Mean = 100 Standard deviation = 20 Sample size = 64 95% confidence level

Q: or the original sample n= 500 Atlanta commute times has a mean of x= 29.11. The standard error from…

A: Given data, n=500 Mean x=29.11 standard error is =0.917 find 90%, 95%, and 99% confidence intervals…

Q: A random group of 36 people in Toms River were asked “how much money did you spend at the grocery…

A: Given: Sample mean x¯=149.50 Sample size (n) = 36 Sample standard deviation (s) = 22.50 Confidence…

Q: Before After 6.9 6.3 3.6 2.1 7.3 7.1 12.8 8.6 8.5 8.2 10.1 6.4 8.4 3.9 5.2 2.1

A: We find the differences of ‘before’ and ‘after’. di= Xi-Yi

Q: The U.S. Department of Labor and Statistics released the current unemployment rate of 5.1% for the…

A:

Q: In question 2 a 90% confidence interval was computed based on a sample of 250 adults. If the level…

A:

Q: A gardener is testing a new type of carrot. From a sample of 15 carrots, she calculates a mean…

A: Given n=sample size=15 X=mean=7.2 s=standard deviation=1.23

Q: Six 3-year-old sheep were injected with an antibiotic. Their blood serum concentrations of…

A: Let X1, X2, ...., Xn be a random sample of size n from a population with mean and variance unknown.…

Q: A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements…

A: In case of paired data from a single population or from two identical populations, related samples…

Q: A custodian wishes to compare two competing floor waxes to decide which one is best. He believes…

A: Formula : Test statistic

Q: A quality control manager wants to be sure that the standard deviation of oil containers is below a…

A: Let Xi be the amount of oil in the ith container,i=1,2,...,n.

Q: A wildlife study is designed to find the mean weight of salmon caught by an Alaskan fishing company.…

A: Given information Standard deviation σ= 2.10 Confidence interval = 0.95 Significance level(α) = 1-…

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 sample of 22 households uses an average of 346.2 gallons of water per day, with a sample standard…

A: The sample size is 22, sample mean is 346.2 and sample standard deviation is 50.5.

Q: the standard deviation of the 16 observations was 0.95 inches (again, the sample mean was 17.2).…

A: Given :  Standard deviation of the 16 observations was 0.95 inches & the sample mean was 17.2.…

Q: Give the best point estimate for the population and construct a 99% confidence interval for the true…

A: Let μ be the population mean score for students. Given that, x¯= 3.4Sample size (n) = 26Sample…

Q: XYZ runs a free shuttle bus service for students between its Fairfax and Manassas campuses.…

A: Given that  n = 29 , S = 12.7

Q: The following sample information is given concerning the ACT scores of high school seniors from two…

A: The  descriptive statics given is as follows

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: A sample of 15 car owners showed that their average repair bill was $300 with a standard deviation…

A: It is given that sample mean is $300 and standard deviation is $32.

Q: A 2016 study reported in Science magazine stated that college math teachers scored a mean of 3.4…

A:

Q: An economist would like to estimate the 95% confidence interval for the average real estate taxes…

A: # Given: at 95% confidence level standard deviations=1580. & Margin of error =500  Then to find…

Q: Recent data from a national survey indicated that the average woman goes to a salon once every five…

A: We have given that the average woman goes to a salon once every five weeks and spend on average…

Q: A random sample of 25 business students required an average of 50.7 minutes to complete a statistics…

A: Given that, Mean = 50.7 Standard deviation = 10.4 Sample size = 25

Q: We take a simple random sample of 16 adults and ask them how long they sleep on atypical night. The…

A: The objective of this question is to calculate the 88% confidence interval for the true mean time…

Q: A food snack manufacturer samples 11 bags of pretzels off the assembly line and weighs their…

A:

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: Givensample size(n)=50Mean(x)=3.34standard deviation(s)=2.163confidence interval = 95%

Q: In a random sample of 24 people, the mean commute time to work was 31.9 minutes and the standard…

A: Given, Sample size = n = 24mean = x = 31.9standard deviation = s = 7.2Level of significance = α =…

Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: Given, Population standard deviation (σ) = 40 mg Margin of error (E) = 10 mg Confidence level = 95%

Q: Suppose you are interested in studying regional differences in crime rates. You take a random…

A:

Q: Both students with the rural and urban background in a college music appreciation course are given…

A:

Q: To determine the views of students on a particular campus about fraternities, an 11-point attitude…

A:

Q: college admissions officer takes a simple random sample of 80 entering freshmen and computes their…

A:

Q: Sales personnel for City Distributors Inc. submit weekly reports listing the customer complaints…

A: Given Information: Sample size (n) = 8 Sample mean (x¯) = 8 Sample standard deviation (s) = 3.464 To…

Q: A professor at a local community college is interested in studying the amount of hours that a…

A: See the handwritten solution

Q: A custodian wishes to compare two competing floor waxes to decide which one is best. He believes…

A: Denote μ1, μ2 as the population mean lifetime of WaxWin and Waxco, respectively.