19. A car insurance company claims that 92% of its customers are happy with their service. You randomly call 57 customers, and find that 45 of them are happy. Is this number significantly lower than...

Solve by hand please (no excel).

Hypothesis testing will consist of four hypothesis tests which you need to complete. each test will require the following:

Type of Test:

Null Hypothesis:

Alternate Hypothesis:

Standard Error:

Test Statistic:

P-value:

Decision:

Sentence:

Extracted text: 19. A car insurance company claims that 92% of its customers are happy with their service. You randomly call 57 customers, and find that 45 of them are happy. Is this number significantly lower than the claim?