Question

Let R be the event that a randomly chosen athlete runs. Let W be the event that a randomly chosen athlete lifts weights. Identify the answer which expresses the following with correct notation: The probability that a randomly chosen athlete lifts weights, given that the athlete runs. Select the correct answer below: @pWR) P(RW) P(R AND W) P/W) AND P(R) Previous Page Next Page Page 10

Answer 1

right choices are

(first part) P(W|R)

this is conditional probability of weight lifter given that one runs

(second part)the mean number of siblings for the randomly selected students

statistic is the sample value whereas parameter is the population value. we want to estimate population parameter with statistic using sample value.

(third part) Maria

here we use standard normal variate z=(x-mean)/sd

for stephanie z=(3.85-3.1)/0.4=1.875

for maria z=(3.8-3.05)/0.2=3,75

(fourth part) 15

frequency of 9.5-10.5 is 7 and

frequency of 10.5-11.5 is 8

so total frequency 8+7=15