Question:

Assuming that the population standard deviation is 60, how large a sample would be needed to provide a 95% confidence interval with a margin of error of 5??

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Question 19 options:?

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959?

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554?

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24?

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390?

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The symbol p0 refers to which of the following??

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Question 21 options:?

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the population proportion under the null hypothesis?

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the actual population proportion?

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the sample proportion under the null hypothesis?

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the observed sample proportion?

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You are testing the null hypothesis that the population mean is equal to 200. What is the rule for rejecting the null hypothesis??

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Question 22 options:?

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p val >= a?

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p val

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p val >= a/2?

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p val

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In ANOVA, the degrees of freedom associated with the sum of squares error are:?

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Question 23 options:?

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k-1?

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nt - 1?

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nt - k?

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nt - k - 1?

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In ANOVA, when the observed value of F is less than 1, it means that:?

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Question 26 options:?

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One of the assumptions of ANOVA was violated?

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For some reason, there is more variability amongst treatment means that one would have expected by chance?

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This is impossible and a calculation error was made?

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For some reason, there is less variability amongst treatment means that one would have expected by chance?

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With 10 degrees pf freedom and .01 in the upper tail, which is the critical value of x2??

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2.558?

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23.209?

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2.765?

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25.188?

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When is the t distribution symmetrical??

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Question 30 options:?

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Only when n ? 30?

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Only when np and n(1-p) are both equal or greater than 5?

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Only when population is normal?

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Always?

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The probability of observing a value for a test statistic under the null hypothesis which is as extreme as, or more extreme than, the observed value of the test statistic in a given sample is called:?

?answee the following

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