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Conduct a one-tailed hypothesis test given the information below. A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mix is 116 days. After a revised mix has been developed, a sample of nine boxes of cake mix had a mean of 117.333 and a standard deviation of 2.456. At the 0.05 significance level, what is the critical value? State the null and alternative hypothesis. Draw a diagram. Provide the computation of the test statistic. State your decision in terms of the null hypothesis. Please show work.
State the decision rule. Compute the value of the test statistic. What is your decision regarding the null hypothesis?
Do you think it would be justified for people of certain racial or ethnic groups to be subject to additional security checks at airport check points?
How certain they were about their choice of major. Research question: At α = .01, is the degree of certainty independent of credits earned?
In the case of Castenedav. Partida, it was found that during a period of 11 years in Hilda County, Texas, 870 people were selected for grand jury duty, and 39% of them were Americans of Mexican ancestry.
For following scores determine values of each expression: X: 4, 2, 1, & 5. åX, åX 2 , (åX) 2 , å(X-1).
What is the best point estimate of the mean weight of babies born to mothers who did not use cocaine during their pregnancies?
A company owns 400 laptops. Each laptop has an 8% probability of not working. You randomly select 20 laptops for your salespeople. What is the likelihood that they will all be broken?
Describe a scenario related to the final project in which you would use repeated-measures ANOVA. Describe a scenario related to the final project in which you would use MANOVA.
The International Agricultural Producers publishes annual data on various selected farm products. Shown above are the unit productions figures.
What is the approximate probability that the combined weight of 25 items exceeds 445 ounces? What theorem is useful in answering this question?
The area of study is Sampling Methods and the Central Limit Theorem. Consider the digits in the phone numbers on a randomly selected page of your local phone book a population.
Can you conclude that information in article is untrue? Use 0.05 significance level. Find out p-value and explain its meaning.
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