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Suppose we wish to test the hypotheses H0: μ = 10 versus Ha: μ < 10, where μ represents the mean age of non-high school aged children who are members of a large gymnastics club in a metropolitan area. Assume age follows a normal distribution with σ = 2. A random sample of 16 ages is drawn from the population, and we find the sample mean of these observations to be μ = 8.76
What is the value of the test statistic?
A) z = -0.62 C) z = -2.48
B) z = -1.24 D) z = -9.92
Can we conclude that there is a positive association between the size of the home and the selling price? Use the .05 significance level.
Which of the following models satisfies the rules of probability and The event corresponding to the above system functioning properly during one period of operation is
What is the distribution of sample means.
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The ANOVA summary table below is the result of a regression of sales on year of sales. Is the relationship statistically significant at .05? Comment.
Calculate the Pearson correlation for these data also determine whether there is a significant correlation among attitudes for husbands also wives.
If the city manager knows the average salary nationally is $38,300, which test of significance should be used? Why?
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Kind of examination produced significant main effects on both mean mark and time taken to complete the examination.
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
Woodco manufactures tables and chairs. Each table and chair must be made entirely out of oak or entirely out of pine. A total of 150 board feet of oak and 210 board feet of pine are available.
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