9. The five-number summary of test scores for the 600 stadents in an introductor

Question

9. The five-number summary of test scores for the 600 stadents in an introductory psychology class at Enormous State University is 52 6 78 85 96. How many students scored higher than 65? (a) 150 (b) 200 (c) 300 (d) 400 (e) 450 10. Simon's lawnmower has a probability of 0.3 of starting any time he pulls the starter cord. Which of the following expressions describes the probability that Simon's lawnmower starts on the fifth pull of the starter cond? o ()a2)'(a.3) (b) (0.7) (03) (e) ()(0(03), (e) (0.7 03)

Explanation / Answer

Q 9.

We have Q1 = 65, that means 25% of the students has less than 65 test scores.

Therefore, 25% means = 25% of 600 =150

i.e. 150 students has test scores less than 65

Therefore , there are 600-150 =450 students who has test scores greater than 65

Answer: Option E) 450

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