The Module 02 Homework assignment covers Sections 7.1-7.3 which covers estimates and sample sizes for populations proportions and mean.

For the Module 02 Homework, please download the Microsoft Word document using the link below and follow the directions included in the assignment.

Module 02 Homework assignment

Module 2 Homework Assignment

1.  459 randomly selected light bulbs were tested in a laboratory, 291 lasted more than 500 hours.  Find a point estimate of the true proportion of all light bulbs that last more than 500 hours.

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2.  Find the critical value for zα/2 that corresponds to a degree of confidence of 98%.

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3. Find the margin of error for the 95% confidence interval used to estimate the population proportion with n = 163 and x = 96.

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4. Construct the confidence interval for question 3.

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5. Interpret the confidence interval found in question 4.

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6.  What are the requirements for a Student’s t-distribution?

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7.  Find the critical value for tα/2  corresponding to n = 12 and 95% confidence level.

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8.Use the confidence level and sample data to find the margin of error E.

                College students’ annual earnings:

                99% confidence, n = 81,  = $3967, s = $874

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9.  Construct the confidence interval for question 8 above.

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10. Interpret the confidence interval found in question 9.

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