Question

1. True or False: Detcrminc whether the following statements are true (T) or false F When the population standard deviation is known, a z-intcerval is used to calculase the confidence interval for the mean As the confidence level decreases, the wider the confidence interval becomes The best point estimate of the popalation mean is the sample mcan The probability of making a type I error is a and the probability of making a type II crror is B As a increases, B also increases The alternative hypothesis ells you whether you are doing a one-ailed or two-tailed test We can use confidence intervals to make a decision about the hypothesis only when doinga two-tailed hypothesis test. 2. Matching Match each word to its correct statement A statement that the valuc of a (A) Type I Enror population parameter is equal to some claimed value (B) Type II Error When failing to rejcct a null hypothesis, is a possibility of making this kind of error. (C) Nall Hypothesis When rejccting a null hypothesis, there s a possibility of making this kind of error. (D) Altcrnative Hypothesis A statement that a population paramcter has a value that somehow differs from'H

Answer 1

Yes alternative hypothesis tells whether test is one tailed or two tailed.

Answer: True

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Yes confidence interval can be used to test two tailed hypothesis.

Answer: True

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2:

A statement that the value of a parameter is equal to some claimed value.

Correct option is C.

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B: Type II error

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A: Type I error

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D: Alternative hypothesis