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"Baby Talk Magazine" reported that the mean time a mother spends changing diapers a day is 15.1 minutes. A sample of 12 moms is chosen from your neighborhood, and it is found that the mean time they spend changing diapers was 16.3 minutes with a standard deviation of 1.6 minutes. Using a level of significance of 0.05, test the claim that the average amount of time a mom spends changing diapers is greater than 15.1 minutes.
a. Determine which test statistic you will use: the standard normal distribution, or the student's t distribution. Explain why you chose this test statistic.
b. State the null and alternative hypotheses, and state the claim.
c. Test the claim at a level of significance of 0.05 and discuss your results, should you reject or not reject the null hypothesis, should you reject or except the claim.
a local unemployment office keeps track of the number of new claims filed each day. based on data collected it
Calculate s(k) for each natural number k from 1 through 15. Are the numbers SQRT(5), PI, and -6 in the domain of the function s? What is the domain of the function s?
What is the dependent variable? is the dependent variable and determine the correlation coefficient. Coefficient of correlation
In a goodness-of-fit test where the sample size is 200, there are 5 categories, and the significant level in .05. The critical value of X2 is.
Debit card purchases are for more than $50. Ms. Tina Stevens just purchased a new dress that cost $120. What is the probability that she paid cash or check?
Let A, B, C be three events such that P(A) = 0:5, P(B) = 0:6, P(C) = 0:8(a) Can any two of these events be mutually exclusive? Explain your conclusion
The university policy department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with mean of 6.0 tickets per day. Find the p..
The company if we want to be 95% confident that the sample percentage is within 3% of the actual percentage of the accidents covered by the company?
Show the sampling distribution of line over x where line over x is the sample mean annual cost of automobile insurance.
Design a Huffman source coding scheme that can achieve lossless transmission with lessthan 90 bit/second.
Compute the skewness for your data set using Pearson's
What would you recommend Taylor do to cut back its labor cost? (Illustrate using an ABC plan.)
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