Straighterline Statistics Final Exam
Questions and Answers 2026/2027
|Already Graded A+| Verified and
Updated
A coach was just to determine whether her basketball team is
performing worse this year than in previous years. The coach knows
that over the past several years games, the team scored an average of
84 points in the last year, with 36 games, they scored an average of only
71 points, with a standard deviation of 24 points. What T test statistic
does this score correspond to? - correct answer --3.25
In a statistical analysis, how does the T distribution differ from the z
distribution? - correct answer -It depends on sample size
In hypothesis testing, a type one error occurs when - correct answer -A
chance result is reported as statistically significant
, An analyst predicts that clients who use a certain investment strategy
will have below average profits. With a sample of 21 clients, the analyst
performs a one tailed T test of this hypothesis at the 95% confidence
level, resulting in a statistic of -1.65. How should the analyst interpret
the result? - correct answer -The null hypothesis is not rejected
A researcher test the hypothesis that math scores are significantly
different between two groups of students. The test yields a p value of
0.01. What is the correct interpretation of this value? - correct answer -
The two score distributions have common values one percent of the
time
A class of 25 students took a reading test before, and after completing
an intensive vocabulary course to determine whether there was a
change in scores in either direction. The mean pretest score was 24, and
the mean post test score was 32. The standard deviation of the
difference was nine. What value of the T statistic does this difference
correspond to? - correct answer -4.4
A researcher wants to test the hypothesis that right handed people will
have different visual, acuity, and their left and right eyes. What sort of
Questions and Answers 2026/2027
|Already Graded A+| Verified and
Updated
A coach was just to determine whether her basketball team is
performing worse this year than in previous years. The coach knows
that over the past several years games, the team scored an average of
84 points in the last year, with 36 games, they scored an average of only
71 points, with a standard deviation of 24 points. What T test statistic
does this score correspond to? - correct answer --3.25
In a statistical analysis, how does the T distribution differ from the z
distribution? - correct answer -It depends on sample size
In hypothesis testing, a type one error occurs when - correct answer -A
chance result is reported as statistically significant
, An analyst predicts that clients who use a certain investment strategy
will have below average profits. With a sample of 21 clients, the analyst
performs a one tailed T test of this hypothesis at the 95% confidence
level, resulting in a statistic of -1.65. How should the analyst interpret
the result? - correct answer -The null hypothesis is not rejected
A researcher test the hypothesis that math scores are significantly
different between two groups of students. The test yields a p value of
0.01. What is the correct interpretation of this value? - correct answer -
The two score distributions have common values one percent of the
time
A class of 25 students took a reading test before, and after completing
an intensive vocabulary course to determine whether there was a
change in scores in either direction. The mean pretest score was 24, and
the mean post test score was 32. The standard deviation of the
difference was nine. What value of the T statistic does this difference
correspond to? - correct answer -4.4
A researcher wants to test the hypothesis that right handed people will
have different visual, acuity, and their left and right eyes. What sort of
