Question

In: Statistics and Probability

For each question draw the normal curve and shade the area where applicable Do not give...

For each question draw the normal curve and shade the area where applicable

Do not give calculator key strokes. ( Give the formula used )

Circle your answer to each question.

3. The daily salaries of substitute teachers for eight local school district is given:

                              60, 56, 60, 55, 70, 55, 60, 55.

  1. What is the point estimate of the population mean μ. (Sample Mean)
  2. Find the 90% confidence interval for the mean salaries of substitute teachers in the eight local school districts.

Solutions

Expert Solution

60 1.125 1.265625
56 -2.875 8.265625
60 1.125 1.265625
55 -3.875 15.01563
70 11.125 123.7656
55 -3.875 15.01563
60 1.125 1.265625
55 -3.875 15.01563

Refer t-table or use excel function "=T.INV.2T(0.10,7)" to find the critical value of t.

orchestra answered 2 years ago
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