A) First, what is the estimated standard error of the mean, sM?  B) Second, what is the value of the t-stat for this sample mean?  C) Third, how many degrees of freedom are there for this t-test?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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A) First, what is the estimated standard error of the mean, sM? 

B) Second, what is the value of the t-stat for this sample mean? 

C) Third, how many degrees of freedom are there for this t-test?

 

 

Your company wants to improve sales. Past sales data
indicate that the average sale was $200 per transaction.
After training your sales force, recent sales data (taken from
a sample of 9 sales reps) indicates an average sale of $250,
with a standard deviation of s = $36. Did the training work?
You will conduct a one sample t-test with alpha = 0.01, one
tailed, to determine whether the average sale significantly
increased from $200 (that is, Ho is that the sales do not differ
significantly from $200, and H₁ is that
they significantly increased).
Transcribed Image Text:Your company wants to improve sales. Past sales data indicate that the average sale was $200 per transaction. After training your sales force, recent sales data (taken from a sample of 9 sales reps) indicates an average sale of $250, with a standard deviation of s = $36. Did the training work? You will conduct a one sample t-test with alpha = 0.01, one tailed, to determine whether the average sale significantly increased from $200 (that is, Ho is that the sales do not differ significantly from $200, and H₁ is that they significantly increased).
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