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26. A school gives an exam for which the scores are normally distributed. What proportion of students will score within 2.3 standard deviations of
26.
A school gives an exam for which the scores are normally distributed. What proportion of students will score within 2.3 standard deviations of the mean?
Select one:
a. 0.72
b. 0.84
c. 0.89
d. 0.98
27.The mean score for 18 holes of golf on the Parkvale municipal course is 68, with a standard deviation of 12. Lou scores 95. What z-score does this correspond to?
Select one:
a. 1.40
b. 1.79
c. 2.25
d. 2.70
- Damien determines that the differences he found in his study are statistically significant at the 0.05 level of significance. What is the correct interpretation of this finding?
Select one:
a. 95% of the study participants achieved the level of performance expected.
b. There is a 95% chance that the observed differences are not correct.
c. We can expect that there will be no observable differences 5% of the time.
d. If the study were repeated 100 times, we would expect to find the observed differences 95 times.
