Approximately what proportion of the observations is between 476 and 524? What will be an ideal ...

Approximately what proportion of the observations is between 476 and 524?

What will be an ideal response?

Q. 2

At the 0.05 level of significance, what conclusion can be drawn, from the hypothesis test, about the quality improvement in the Scullia Auto Company?

What will be an ideal response?

Q. 3

A 95 confidence interval estimate for the difference between two population means, 1 - 2, is determined to be 62.75 < 1 - 2 < 68.52. Which of the following is true if the confidence level is reduced to 90?

A) The confidence interval becomes wider.
B) The confidence interval remains the same.
C) The confidence interval becomes narrower.
D) More information is required to determine the answer.

Q. 4

A test of independence is to be performed. The table has 4 rows and 3 columns. What would the degrees of freedom be?

A) 12
B) 6
C) 9
D) 3

Q. 5

In a multiple regression analysis, six independent variables are used in the equation based on a sample of 45 observations. What are the degrees of freedom associated with the F statistic?

A) 6 and 45
B) 5 and 44
C) 6 and 38
D) 4 and 40

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Approximately what proportion of the observations is between 476 and 524? What will be an ideal ...

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