Business stats Quiz

Business stats Quiz

Just send correct mulTiple choice anSWER

QUESTION 1

1.

The level of significance

		can be any positive value
		can be any value
		is (1 – confidence level)
		can be any value between -1.96 to 1.96

10 points

QUESTION 2

1.

When the p-value is used for hypothesis testing, the null hypothesis is rejected if

		p-value ≤ α
		α < p-value
		p-value ≥ α
		p-value = 1 – α

10 points

QUESTION 3

1.

When each data value in one sample is matched with a corresponding data value in another sample, the samples are known as

		corresponding samples
		matched samples
		independent samples
		None of these alternatives is correct.

10 points

QUESTION 4

1.

What type of error occurs if you reject H0 when, in fact, it is true?

		Type II
		Type I
		either Type I or Type II, depending on the level of significance
		either Type I or Type II, depending on whether the test is one tail or two tail

10 points

QUESTION 5

1.

The p-value is a probability that measures the support (or lack of support) for the

		null hypothesis
		alternative hypothesis
		either the null or the alternative hypothesis
		sample statistic

10 points

QUESTION 6

1.

The power curve provides the probability of

		correctly accepting the null hypothesis
		incorrectly accepting the null hypothesis
		correctly rejecting the alternative hypothesis
		correctly rejecting the null hypothesis

10 points

QUESTION 7

1.

A Type II error is committed when

		a true alternative hypothesis is mistakenly rejected
		a true null hypothesis is mistakenly rejected
		the sample size has been too small
		not enough information has been available

10 points

QUESTION 8

1.

A two-tailed test is performed at 95% confidence. The p-value is determined to be 0.09. The null hypothesis

		must be rejected
		should not be rejected
		could be rejected, depending on the sample size
		has been designed incorrectly

10 points

QUESTION 9

1.

Your investment executive claims that the average yearly rate of return on the stocks she recommends is at least 10.0%. You plan on taking a sample to test her claim. The correct set of hypotheses is

		H0: μ < 10.0% Ha: μ ≥ 10.0%
		H0: μ ≤ 10.0% Ha: μ > 10.0%
		H0: μ > 10.0% Ha: μ ≤ 10.0%
		H0: μ ≥ 10.0% Ha: μ < 10.0%

10 points

QUESTION 10

1.

For a two-tailed test at 98.4% confidence, Z =

		1.96
		1.14
		2.41
		0.8612

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