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A study of 80 white mice showed that their average weight was 3.7 ounces. The standard deviation of the population is 0.6 ounces. Which of the following is the 95% confidence interval for the mean weight per white mice?
a. (2.52,4.88)b. (3.54, 3.86)c. (3.57, 3.83)d. (3.39,4.01)
Test to see if the mean cell phone bill has changed since 2004. Use a .05 level of significance for the test.
Suppose that you want to set up a statistical test to challenge the claim of 6.7 seconds. What would you use for the null hypothesis?
If alternate hypothesis mention that m doesn't equal 4,000, determine the rejection region for the hypothesis test?
The Awake Coffee Company produces gourmet instant coffee. The company wants to be sure that the average fill of coffee containers is 12.0 ounces.
What can one conclude about the librarian's hypothesis at a level of significance of .05?
Ccarry out a Z test using the five steps hypothesis testing with a two-tailed test at the .05 significance level, and make a drawing of the distributions involved.
Ten thousand fireflies are unable to produce light due to a genetic mutation. express the null hypothesis and the alternative hypothesis in symbolic form.
If 3 different factor levels show a lot of variation between levels this implies:
Evaluate the data below using the Kruskal - Wallis Nonparametric Hypothesis Test. Explain why you chose this particular nonparametric test to analyze your data.
Approximately 14 percent of the population of Arizona is 65 years or older. A random sample of five persons from this population is taken. The probability that less than 2 of the 5 are 65 years or older is:
Environmental health indicators include air quality, water quality, and food quality. Twenty-five years ago, 47% of U.S. food samples contained pesticide residues. In a recent study, 44 of 125 food samples contained pesticide residues.
Can we conclude, at the level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from months?
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