Testing the claim that at least 88% of students have a cell phone would be a rig

Question

Testing the claim that at least 88% of students have a cell phone would be a right- tail test True False True or False: Given H_0: Mu = 40 H_ a: Mu is not equal to 40 and (p-value) P = 0.0436. You would reject the null hypothesis at the 0.05 level of significance. True False Problem-Solving-Solve each of the following problems. Alex tossed a coin. The first time he got a head; the second time he got a head again. What's the probability of getting a head on the third toss? There are 20 coupons rolled up and placed inside round plastic balls in a box. There are 3 different types of coupons: 10 of them can be redeemed for "free drinks", 5 can be redeemed for "free desserts", and 5 can be redeemed for "free entrees". If you shake the box and then randomly select one coupon. What's the probability that you will get a free entree coupon? Mary was tossing a coin. She tossed three times. What's the probability that at the first toss she gets a head, the second toss she gets a tail at and the third time she get a tail?

Explanation / Answer

24.

FALSE. [ANSWER]

The claim here is the null hypothesis, which is "at least". Hence, the alternative is "less than 88%", which is left tailed.

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25.

TRUE. [ANSWER]

THis is because we reject the null hypothesis when P < alpha. Here, P = 0.0436, and alpha = 0.05.

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