can someone please tell me how to do this with ti 84 ? thank you! be Homesek-Mel

Question

   can someone please tell me how to do this with ti 84 ?

thank you!

be Homesek-Melasa Schoenderger-Microsoh Edge mathul.com Inbro to Probability and Statistics Section T1 Fal 2017 Homework: Section 7.4 Homework Score: 0 of 1 pt 7.4.27 1a or 10 (8 complete) Hw Score: 625%. 625of10pts a recent o 4 % of survey respondents said that, if they only had one child they would prefer the child to be abo would prefer a boy Suppose you c d ted a survey of t ra dori etedshed son yor camp sa dedN85d (a) Use the normal approximaion to the binomial to approximate the probabiity that in a random sample of 180 shudents, at keast 85 would grefer a boy, assuming the true parcentage is 45% (b) Does this result contradict the pol? Explain (a) The probability that at least 85 students would prefer a boy Round to four decimal places as needad ) Enter your answer in the answer box and then click Check Answer part remaining OType here to search

Explanation / Answer

Answer to the question here:

p0 = .45
p = 85/180 = .472

Z = (p-p0)/sqrt(p0*p0'/n) = (.472-.45)/sqrt(.45*.55/180) = .59

So,
Ho: p <=.45
Ha: p >.45. Hence,

P(X>85) = P(Z> .59) = 1-.7224 = .2776

b. For this refer to the p-value above. It is .2776. The result doesnt contrdict pole since .2776>.05 ( our critical value). and hence we do not reject null hypothesis.

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