A critical component on a submarine has an operating lifetime that is expo- nentially distributed with mean 0.50 years. As soon as a component fails, it is replaced by a new one having statistically identical properties. What is the smallest number of spare components that the submarine should stock if it is leaving for a one-year tour and wishes the probability of having an inoperable unit caused by failures exceeding the spare inventory to be less than 0.02?

The value of z test statistics is 1.561.

Step-by-step explanation:

We are given that a poll finds that 54% of the 600 people polled favor the incumbent.

Shortly after the poll is taken, it is disclosed that the incumbent had an extramarital affair. A new poll finds that 50% of the 1030 polled now favor the incumbent.

Let p_1 = population proportion of people who favor the incumbent in the first poll

p_2 = population proportion of people who favor the incumbent in the second poll

So, Null Hypothesis, H_0 : p_1\geq p_2      {means that his support has increased or remained same after the second poll}

Alternate Hypothesis, H_0 : p_1 < p_2    {means that his support has decreased after the second poll}

The test statistics that would be used here is Two-sample z test for proportions;

where, \hat p_1 = sample proportion of people who favor the incumbent in first poll = 54%

\hat p_1 = sample proportion of people who favor the incumbent in second poll = 50%

n_1 = sample of people in first poll = 600

n_2 = sample of people in second poll = 1030

So, the test statistics  = 1.561

        Hence, the value of z test statistics is 1.561.

the answer is 11.2 (i know i’m late)

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"we buried my cousin last summer. he was 32 when he hanged himself from a closet coat rack in the throes of alcoholism, the fourth of my blood relatives to die prematurely from this deadly disease. if america issued drinking licenses, those four men—including my father, who died at 54 of liver failure—might be alive today. that is a good example piece   some steps that are .

. writing something that happened to you

.read a book you like to get ideas from there

. lastly you can make a venn diagram

hope this plz make brainliest

step-by-step explanation: