# Project #36551 - Statistics

Solve the following problems:
ï‚· Examine the given statement:

o The proportion of people aged 1825 who currently use illicit drugs is equal to 0.20 (or 20%). Express the null hypothesis H0 and the alternative hypothesis H1 in symbolic form. Be sure to use the correct symbolsμ, p, and σfor the indicated parameter.

ï‚· Refer to the following data: o Two-tailed test; 0.10

o Assume that the normal distribution applies and find the critical z values. ï‚· Use the following information to find the P-value.

o The value of the test statistic for a right-tailed one mean z test is z = 2.50.
o Use a 0.05 significance level and state the conclusion about the null hypothesisreject the

null hypothesis or fail to reject the null hypothesis.

• ï‚·  Test the claim: A simple random sample of 50 adults is obtained, and each person’s red blood cell

count (in cells per micro-liter) is measured. The sample mean is 5.23. The population standard deviation for red blood cell counts is 0.54. Use a 0.01 significance level to test the claim that the sample is from a population with a mean less than 5.4, which is a value often used for the upper limit of the range of normal values. What do the results suggest about the sample group?

• ï‚·  Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about the null hypothesis, and the conclusion that addresses the original claim. Use the P-value method.

Submission Requirements:

• ï‚·  Submit the assignment in a Microsoft Word or Excel document.

• ï‚·  Show detailed steps and provide appropriate rationale with your answers.

Evaluation Criteria:

ï‚· Included appropriate steps or rationale to determine the answer to each question

 Subject Mathematics Due By (Pacific Time) 07/30/2014 11:59 pm
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