Medical Operations The director of a medical hospital feels that her surgeons perform more operations per year than the national average of 211. She selected a random sample of 15 surgeons and found that the mean number of operations they performed was 212.6. The standard deviation of the sample was 3.8. Is there enough evidence to support the director's feelings at a= 0.10? Assume that the population is approximately normally distributed. Use the critical value method and tables. Part 1 of 5 est. nd the crical value(s). Round the answer(s) If han one critical value, separate th O1345 Part: Part 3 of 5 (c) Compute the test value. Always round score values to at least three decimal places. t =

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Medical Operations The director of a medical hospital feels that her surgeons
perform more operations per year than the national average of 211. She selected
a random sample of 15 surgeons and found that the mean number of operations
they performed was 212.6. The standard deviation of the sample was 3.8. Is there
enough evidence to support the director's feelings at a= 0.10? Assume that
the population is approximately normally distributed. Use the critical value
method and tables.
Part 1 of 5
esis test is
test.
(End the citical value(s). Round the answer(s)
If
han one critical value, separate th
CI CO
O1.345
Part:
Part 3 of 5
(c) Compute the test value. Always round i score values to at least three
decimal places.
Transcribed Image Text:Medical Operations The director of a medical hospital feels that her surgeons perform more operations per year than the national average of 211. She selected a random sample of 15 surgeons and found that the mean number of operations they performed was 212.6. The standard deviation of the sample was 3.8. Is there enough evidence to support the director's feelings at a= 0.10? Assume that the population is approximately normally distributed. Use the critical value method and tables. Part 1 of 5 esis test is test. (End the citical value(s). Round the answer(s) If han one critical value, separate th CI CO O1.345 Part: Part 3 of 5 (c) Compute the test value. Always round i score values to at least three decimal places.
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