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D" size batteries produced by MNM Corporation have had a life expectancy of 86 hours. Because of an improved production process, it is believed that there has been an increase in the life expectancy of its " D" size batteries. A sample of 25 batteries showed an average life of 88.5 hours. Assume from past information that it is known that the standard deviation of the population is 7hours
a. formulate the hypotheses for this problemb. compute the test statistic, and at 95% confidence, test the hypothesesc. What is the p-value associated with the sample results? What is your conclusion based on the p-value?
To speed up the process in a blood testing procedure, blood samples from 3 people are combined into one mixture. The mixture will only test negative if all the individual samples are negative.
She has a history of being successful at getting a donor on 55 percent of her calls. If June has a quota to get at least four donors each day.
Perform a two-tailed hypothesis test on both the intrinsic and the extrinsic variable's data, using a .05 significance level. Begin by creating a null and an alternate statement.
Suppose that you wish to perform a nonparametric test for a difference among the medians of three or more independent populations. Which of these tests would be appropriate?
The table shows the retail market share of passenger cars from Ford Motor Company as a percent of the US market.
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
Identify the null hypothesis, alternative hypothesis, test statistic, P-value and conclusion about the null hypothesis. Use the P-value method.
Based on the empirical data determine the following probabilities:
At the 5% significance level, can the researcher reject the hypothesis that the mean reading scores of all children in the three school systems is the same? Formulate and test the appropriate hypotheses. Use the critical value approach.
Using the .01 significance level you will test to conclude if the analyst finds evidence that the boast of dealership A is correct. What will be your critical value?
Set up hypotheses to test if distribution of birthdays can be considered coming from uniform distribution.
What is the required sample size if you need to estimate the number of workers in the United States who are highly satisfied with their job and you want the estimate to be within 2 percentage points of a 96% confidence interval.
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