The economist would like to test the claim that the percent of thirty-year fixed-rate mortgage loans that have a 4.75 percent interest rate is less than 22%. Sample size =40 thirty-year fixed-rate mortgage loans
Sample proportion =0.125

Calculate the test statistic using the formula

where:

p′ = sample proportion,
n = sample size, and
p0 = population proportion under the null hypothesis
Round your answer to 2 decimal places.

Give the functions f(x) = |x + 2| - 3, what is the domain? a, b,c, or d all real numbers x > 2 x < -2 all real numbers and x cannot equal to 2

The radius of a sphere is 3 inches. which represents the volume of the sphere?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.