Assume that the scores on a test of visual memory are normally distributed.Assume that the mean score is 10 and the standard error is 0.5.About 95% will fall in the range ____. A)9.5 to 10.5 B)9.0 to 11.0 C)8.5 to 11.5 D)8.0 to 12.0

Question

Quizplus · Accepted Answer

The range that includes 95% of the scores can be found using the formula: 
Mean ± 1.96 * standard error.

Substituting the values given, we get:

10 ± 1.96 * 0.5 = 9.02 to 10.98 (rounded to nearest tenth)

Therefore, the best choice is B, which includes this range.

Assume That the Scores on a Test of Visual Memory