Public School Teachers' Salaries The average salary for public school teachers for a specific year was reported to be $39,385. A random sample of 50 public school teachers in a particular state had a mean of $41,680, and the population standard deviation is $5975. Is there sufficient evidence at the a = 0.05 level to conclude that the mean salary differs from $39,385?

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12. Public School Teachers' Salaries The average salary
for public school teachers for a specific year was
reported to be $39,385. A random sample of 50 public
school teachers in a particular state had a mean of
$41,680, and the population standard deviation is
$5975. Is there sufficient evidence at the a = 0.05 level
to conclude that the mean salary differs from $39,385?
Source: New York Times Almanac.
Transcribed Image Text:12. Public School Teachers' Salaries The average salary for public school teachers for a specific year was reported to be $39,385. A random sample of 50 public school teachers in a particular state had a mean of $41,680, and the population standard deviation is $5975. Is there sufficient evidence at the a = 0.05 level to conclude that the mean salary differs from $39,385? Source: New York Times Almanac.
State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
a.
Summarize the results.
Use diagrams to show the critical region (or regions),
and use the traditional method of hypothesis testing
unless otherwise specified.
Transcribed Image Text:State the hypotheses and identify the claim. b. Find the critical value(s). c. Compute the test value. d. Make the decision. a. Summarize the results. Use diagrams to show the critical region (or regions), and use the traditional method of hypothesis testing unless otherwise specified.
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