QUESTION 16 students who took the exam last year, what is In Colorado, the avera

Question

QUESTION 16 students who took the exam last year, what is In Colorado, the average ACT score is 20.1 with a standard deviation of 1.3. In a random sample of 35 the probability that the average composite ACT score is 19.5 or less? Show your calculations for finding the z-score then find the probability to four decimal places using the appropriate probability notat (2 pts). ion (2 pts). Write a sentence that gives your solution in context TTT Paragraph , Arial Words:0 Path: p Click Save and Submit to save and submit. Click Save All Answers to saue all answers

Explanation / Answer

P(Sample mean < 19.5)

= P(x - bar < 19.5)

= P(z < (19.5 - 20.1)/(1.3/sqrt(35))

= P(z < -2.730)

= 0.0032

Hence,

Probability that the avergae composite ACT score is 19.5 or less will be 0.0032

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