Reference no: EM132338232

Attempt all the Questions:

Question 1:

 Find
a) P(z < 2.37)
b) P(z > -1.18)
c) P(-1.18 < z < 2.37)

Question 2: Suppose you survey that a random sample of 150 people from one hospital has been given cholesterol tests, and 60 of these people had levels over the "safe" count of 200. Construct a 95% confidence interval for the population proportion of people in test with cholesterol levels over 200.

Question 3:

A research conducted by the University of Michigan claimed that there are more female drivers in the USA than male drivers. A researcher decides to test this claim on his state. In his simple random sample of 900 observations, he noticed that 468 of 900 were women. At α = 0.05, is there enough evidence to support theclaim? (Use the P-value method where (z < 1.20) = 0.8849)

Question 4:
A sample of 100 body temperatures has a mean of 98.8°F. Assume that σ is known to be 0.6 °F. Use a 0.05 significance level to test the claim that the mean body temperature of the population is equal to 98.6°F, as is commonly believed. Is there sufficient evidence to conclude that the common belief is wrong?

(Use the P-value method where (z< 3.33) = 0.9996)

Question 5:

Listed below are the body lengths (in inches) and weights (in lb) of randomly selected bears:

Find the value of the linear correlation coefficient.

Letting y represent weights of bears and letting x represent their lengths, find the regression equation.

Based on the given sample data, what is the best predicted weight of a bear with a length of 72.0 inch?