Of those mountain climbers who attempt Mt. Everest, 68.2% reach the summit. In a random sample of 25 mountain climbers who are going to attempt Mt. McKinley, what is the probability of each of the following? Round your answers to four decimal places. (1) all 25 reach the summit (1) at least 15 reach the summit (1) no more than 18 reach the summit

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A: Method: By using the hypothesis testing

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A: Please find the explanation below. Thank you.

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A: given data,claim :p>0.5x=609n=1202p^=xn  =6091202  =0.5067α=0.01

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A: Given: n = 55 X = 2.07 s = 1.11 Confidence level = 91.7% Formula Used: Confidence interval = X ± tsn

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A: Method : By using the z test statistic to calculate the observed value.

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