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Probability and Statistics Could you please solve the following questions with specifying the answers A. What is the...

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Statistics

Probability and Statistics

Could you please solve the following questions withspecifying the answers

A. What is the probability that z, the standardnormal distribution, is less than 1.75 standard deviations belowthe mean of zero?

a. 5%      b.4%      c.6%      d. 7.4%

B. If two random samples of the heights ofadult males in New York are taken, one of 400, the other of 900people, which one would likely have the larger range from shortestto tallest?

a. the 400 person sample      b.the 900 person sample    c. they’d be equal

C. The p-value of a test of the null hypothesisis 3.5%. This means

a. the hypothesis is true with probability 3.5% or possibly lessthan 3.5%

b. the alternative hypothesis is true with probability 3.5% orpossibly less

c. 3.5% is the probability of finding the observed or moreextreme results when the null hypothesis (H 0) istrue

d. None of the above

D. One of the main reasons to be interested inthe regression line of y on x is that

a. one can use it to predict y-values from differentx-values

b. one can determine the standard deviation ofy     

c. one can determine from it the values of the quartiles of xand y.

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