core: 0 of 1 pt 11 of 20 (10 comp A company gave psychological tests to prospect

Question

core: 0 of 1 pt 11 of 20 (10 comp A company gave psychological tests to prospective employees. The random variable x represents the possible test scores. Use the histogram to find the04 probabilities in parts (a) and (b). Test scores 0.2 0-7026 0.34 2 02 0.08 (a) Find the probability that a person selected at random from the survey's sample had a test score of more than two. 0.34 (Round to two decimal places as needed) (b) Find the probability that a person selected at random from the survey's sample had a test score of less than four. Round to two detimal places as needed.) Enter your answer in the answer box and then click Check All parts showing

Explanation / Answer

a) a person selected at random from the survey's sample had a test score of more than two.

P(X>2) = P(X=3) + P(X=4)

= 0.26 + 0.08

P(X>2) = 0.34

b) a person selected at random from the survey's sample had a test score of less than 4.

P(X<4) = P(X=0) + P(X=1) + P(X=2) + P(X=3)

= 0.05 + 0.28 + 0.33 + 0.26

P(X<4) = 0.92

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.