A researcher suspects that the
mean score μ of all third- graders in Henrico County Schools is different from the national
mean, which is 32. To test her suspicion, she administers the DRP to an SRS of 44 Henrico
County third-grade students. The distribution of scores is summarized in the Minitab output
below:
CLICK FOR REST

Question

A researcher suspects that the
mean score μ of all third- graders in Henrico County Schools is different from the national
mean, which is 32. To test her suspicion, she administers the DRP to an SRS of 44 Henrico
County third-grade students. The distribution of scores is summarized in the Minitab output
below:
CLICK FOR REST

anonymous · Answer

MEAN STDEV SEMEAN MIN Q1 MEDIAN Q3
MAX
DRP 35.09 11.19 1.69 14.00 26.00 35.00 44.00
54.00

anonymous · Answer

Construct a 90% confidence interval to estimate the mean DRP score in Henrico County
Schools.