In​ 2017, the average credit score for loans that were purchased by a​ government-sponsored mortgage loan company was 746. A random sample of 35 mortgages recently purchased by the company was​ selected, and it was found that the average credit score was 758 with a sample standard deviation of 20. Complete parts a through c.

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In​ 2017, the average credit score for loans that were purchased by a​ government-sponsored mortgage loan company was

746.

A random sample of

35

mortgages recently purchased by the company was​ selected, and it was found that the average credit score was

758

with a sample standard deviation of

20.

Complete parts a through c.

In 2017, the average credit score for loans that were purchased by a government-sponsored mortgage loan company was 746. A random sample of 35 mortgages recently purchased by the company was selected, and it was found that the
average credit score was 758 with a sample standard deviation of 20. Complete parts a through c.
.....
a. Using a = 0.05, is there enough evidence from this sample to conclude that the average credit score for mortgages purchased by the company has increased since 2017?
Determine the null and alternative hypotheses.
Ho: H
(Type integers or decimals. Do not round.)
Transcribed Image Text:In 2017, the average credit score for loans that were purchased by a government-sponsored mortgage loan company was 746. A random sample of 35 mortgages recently purchased by the company was selected, and it was found that the average credit score was 758 with a sample standard deviation of 20. Complete parts a through c. ..... a. Using a = 0.05, is there enough evidence from this sample to conclude that the average credit score for mortgages purchased by the company has increased since 2017? Determine the null and alternative hypotheses. Ho: H (Type integers or decimals. Do not round.)
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