In a test using Anova, the average ages of three different samples are 37.56, 37.57, 37.58. This pattern would be consistent with the assumption that the a. null hypothesis is false b. null hypothesis is true C. research hypothesis is false d. sample standard deviations approach zero okay

Q: A national survey reports that the average number of screens (TVs, computers, tablets, and…

A: Solution We have given The null and alternative hypothesis H0: μ=10.7    H1:μ≠10.7

Q: In a multiple-choice examination in Chemistry, students Mae and Julie received scores of 82 and 65,…

A: We have given that.   X~N( μ , ?^2 )   μ = , ? =   Z-score =( x - μ )/?

Q: Recent Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested…

A: Given that Mean(µ) = 24.8 Standard deviations (σ) = 6.2

Q: Suppose it is known that the standard deviation of the weight of 10-ounce packages of cookies is…

A:

Q: Is there a difference in the average age that people get married in the US and its close neighbor,…

A: Obtain the 95% confidence interval for the mean rating. The 95% confidence interval for the mean…

Q: Which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli, and rice bought…

A: Here the sample is more than 30. Therefore z test can be used here.Null hypothesis:The mean cost of…

Q: A researcher believes that there has been a reduction in the mean number of hours that college…

A: GivenMean(x)=19.6standard deviation(σ)=7.3sample size(n)=227α=4%=0.04

Q: The mean age of De Anza College students in a previous term was 26.6 years old. An instructor thinks…

A: State the hypotheses That is, there is no evidence that the mean age for online students is older…

Q: A local police department made an effort to determine the average speed of automobiles travelling…

A:

Q: Allegiant Airlines charges a mean base fare of $86. In addition, the airline charges for making a…

A: Total cost = $86 + $36= $122 Hence, μ=122σ=40 a.  The population mean cost per flight is $122…

Q: Dental associations recommend that the time lapse between routine dental checkups should average six…

A:

Q: (a) The sample standard deviation was not reported, but suppose that it was 4 hours. Carry out a…

A: It is given that  Population mean = 12.6 Sample mean = 12.8 Sample Standard deviation = 4 Sample…

Q: Death row and the single-sample t test: The Florida Department of Corrections publishes an online…

A: Solution a. The following data is provided in the question 25.62, 13.09, 8.74, 17.63, 2.8, 4.42,…

Q: 3. A company that manufactures cars would like to determine the mileage of their brand-new cars. If…

A:

Q: Use your own sample mean and sample standard deviation. A nutrition store in the mall is selling…

A: Testing the hypothesis about a population mean using the Z statistic σ known using following steps…

Q: community college Math instructor feels that the average number of units students enroll in each…

A: Hypothesis testing  Hypothesis testing is conducted for the parameters of the population like…

Q: Lesley E. Tan investigated the relationship between left-handedness vs. right-handedness and motor…

A: Normal distribution     Normal distribution, also known as the Gaussian distribution, is a…

Q: Two samples of 103 and 80 students are taken with a view to find out their average monthly…

A:

Q: the standard error of the mean for a random sample of 49 tax returns is ________.

A: Given information Mean = $ 1,949 Standard deviation = $750 Sample size = 49

Q: 80 smokers were questioned about the number of hours they sleep each day. We want to test the…

A: From the given information we conduct Z test for mean.

Q: Dog researchers are trying to determine if the brand of dog bed effects how much sleep dogs get. me…

A: For brand A bed:Sample size, Sample mean, hoursSample standard deviation,  hoursFor brand P…

Q: Workers employed in a large service industry have an average wage of $15.00 per hour with astandard…

A: Solution: Given information: n= 64 Sample size of workers x=12.50 Sample meanμ=$15.00 Population…

Q: At a certain university, the average cost of books was $390 per student last semester and the…

A: σ = 75claim : μ>390x¯ = 415n =55test value = ?

Q: A tire producer wants to test whether the mean diameter of the tires produced on a given day equals…

A: Given random sample,n=49 x=36.4 and σ=0.8 inches alpha level =0.05 Here tire producer wants to…

Q: Two samples were given the same task. One sample was put into a room painted red, and the pther was…

A: That is, there is no difference between tow population standard deviations. That is, there is…

Q: In a study of computer use, 1000 randomly selected Canadian Internet users were asked how much time…

A: Given,sample size(n)=1000sample mean(x¯)=12.6standard deviation(s)=4α=0.05

Q: It has been claimed that during ECQ, the average number of hours that a millennial spends watching…

A: Given that  Sample size n =100 Sample mean =144 Population standard deviation =20

Q: Unoccupied seats on flights cause airlines to lose revenue. As an intern in the finance department…

A:

Q: Utility bills for single family homes are at least $150 per month. After an improvement in…

A: Given information:

Q: The accounts of a corporation show that on average, accounts payables are $125 with standard…

A: Sample size (n) = 20 Sample mean (X) = 129 Pop. standard deviation (σ) = 25 α = 5% = 0.05

Q: In a recent study of 42 eighth graders, the mean number of hours per week that they watched…

A: We are required to estimate the interval for the TV watching hours per week from the given sample of…

Q: Do political science classes require less writing than history classes? The 47 randomly selected…

A: As per Bartleby guideline expert have to answer first three subpart only dear student please upload…