Question

asked 2021-05-18

The college physical education department offered an advanced first aid course last semester. The scores on the comprehensive final exam were normally distributed, and the z scores for some of the students are shown below:

Robert, 1.10 Juan, 1.70 Susan, -2.00

Joel, 0.00 Jan, -0.80 Linda, 1.60

Which of these students scored above the mean?

Robert, 1.10 Juan, 1.70 Susan, -2.00

Joel, 0.00 Jan, -0.80 Linda, 1.60

Which of these students scored above the mean?

asked 2021-05-09

Robert, 1.10 Juan, 1.70 Susan, -2.00

Joel, 0.00 Jan, -0.80 Linda, 1.60

Which of these students scored above the mean?

asked 2021-05-18

asked 2020-10-19

Researchers carried out a survey of fourth-, fifth-, and sixth-grade students in Michigan. Students were asked whether good grades, athletic ability, or being popular was most important to them. This two-way table summarizes the survey data.

\(\begin{array} {|c|} & Grade \ Most important & \begin{array}{l|c|c|c|c} & \begin{array}{c} 4 \mathrm{th} \ grade \end{array} & \begin{array}{c} 5 \mathrm{th} \ \text { grade } \end{array} & \begin{array}{c} 6 \mathrm{th} \ grade \end{array} & Total \\ \hline Grades & 49 & 50 & 69 & 168 \\ \hline Athletic & 24 & 36 & 38 & 98 \\ \hline Popular & 19 & 22 & 28 & 69 \\ \hline Total & 92 & 108 & 135 & 335 \end{array} \ \end{array}\)

Suppose we select one of these students at random. What's the probability that: The student is a sixth grader or a student who rated good grades as important?