Stat quistions?? Answer 1-7

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A sample of 37 observations is selected from a normal population. The sample mean is 29, and the population standard deviation is 5. Conduct the following test of hypothesis using the 0.05 significance level.

H₀ : μ ≤ 26

H₁ : μ > 26

Is this a one- or two-tailed test?

H₀, when z > evidence to conclude that the population mean is greater than 26.

e.	What is the p-value? (Round your answer to 4 decimal places.)

At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was told, “You can average $82 a day in tips.” Assume the population of daily tips is normally distributed with a standard deviation of $3.26. Over the first 44 days she was employed at the restaurant, the mean daily amount of her tips was $84.61. At the 0.02 significance level, can Ms. Brigden conclude that her daily tips average more than $82?

State the null hypothesis and the alternate hypothesis.

H₀. The mean number of calls is than 39 per week.

United Nations report shows the mean family income for Mexican migrants to the United States is $28,540 per year. A FLOC (Farm Labor Organizing Committee) evaluation of 28 Mexican family units reveals a mean to be $34,120 with a sample standard deviation of $10,050. Does this information disagree with the United Nations report? Apply the 0.01 significance level.

a.	State the null hypothesis and the alternate hypothesis.


H₀: μ =	. This data the report.

The following information is available.

H₀ : μ ≥ 220

H₁ : μ < 220

A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis using the .025 significance level.

Is this a one- or two-tailed test?

H₀ when z < H₀. There is evidence to conclude that the population mean is greater than 10

Given the following hypotheses:

H₀ : μ = 400

H₁ : μ ≠ 400

A random sample of 12 observations is selected from a normal population. The sample mean was 407 and the sample standard deviation 6. Using the .01 significance level: