Question

1. Suppose you are going to conduct a two tail test concerning the population mean. Suppose that you do not know what the population standard deviation is and that you have a sample of 55 observations. If you are going to conduct this test at the .01 level of significance what is the critical value? Be sure to enter a positive number and answer to four decimal places.

2.The p-value is?

Group of answer choices:

the probability of a Type I error.

the probability of a Type III error.

1 minus the probability of a Type I error.

1 minus the probability of a Type II error.

3. You have poverty guidelines for a certain MSA which indicate that for a family of four the weekly income necessary to be above the poverty line is $550. You take a sample of household incomes for 48 households zoned for a particular school within the MSA. You find a sample average for weekly income of $540 and a standard deviation of $86. Test the null hypothesis that average weekly pay for households zoned for that school is at least $550. Conduct this test at the .05 level of significance.

What is the critical value? Answer to four decimal places.

Answer 1

1.

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