Statistics Quiz with Solutions (5 Questions)

by Electra Radioti

Statistics Quiz with Solutions (5 Questions)

Statistics Quiz with Solutions (5 Questions)

1 / 5

For a sample space S = {q, r, s, t}, suppose two events are identified as A = {q, t} and B = {r, s}. Also, P(q) and P(r) are 0.3 and 0.5 respectively and P(t) = 0.2. Calculate the P(A).

2 / 5

The heights of male high school students are measured. The average height is found to be 68 inches with a standard deviation of 2 inches. The distribution is approximately normal. If we draw a random sample of 16 boys from the school, then the standard deviation of the sample mean is:

3 / 5

The heights of male students at a high school are measured. The average height is found to be 68 inches with a standard deviation of 2 inches. The distribution is approximately normal. If we draw a random sample of 16 boys from the school, what is the probability that the average height of these 16 boys is 71 inches or taller?

4 / 5

A women's softball team plays soccer 2, 3, or 1 days a week. The probability that they play 2 days is 0.3, the probability that they play 3 days is 0.2, and the probability that they play 1 day is 0.5. Determine the average days per week that the team plays softball.

5 / 5

Sean orders 20 pairs of gloves from an online clothing manufacturer. The site claims that it averages only 12 damaged pair of gloves for every 45,000 it produces. What is the probability that there are no perfect pieces in his order?

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