30 randomly selected students took the calculus final. If the sample mean was 93 and the standard deviation was 13.3, find the margin of error for a 99% confidence interval for the mean score of all students. O a. 9.69 O b. 6.99 6.96 6.69 O c. O d.

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30 randomly selected students took the calculus
final. If the sample mean was 93 and the
standard deviation was 13.3, find the margin of
error for a 99% confidence interval for the mean
score of all students.
O a. 9.69
O b. 6.99
O c.
6.96
O d.
6.69
Transcribed Image Text:30 randomly selected students took the calculus final. If the sample mean was 93 and the standard deviation was 13.3, find the margin of error for a 99% confidence interval for the mean score of all students. O a. 9.69 O b. 6.99 O c. 6.96 O d. 6.69
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