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Which of the following is the hypothesis that is being tested?

• Null hypothesis

• Alternative hypothesis

• Directional Hypothesis

• Non-directional Hypothesis

Which of the following defines the type I error?

• True hypothesis has been rejected

• false hypothesis has been rejected

• true hypothesis has been accepted

• false hypothesis has been rejected

A company claims that its new product is not harmful to the environment, this statement is an example of what hypothesis?

• null hypothesis

• alternative hypothesis: two tailed

• alternative hypothesis: right tailed

• alternative hypothesis: left-tailed

A study concludes that there is no significant difference between two groups when there is actually a difference. Did the researcher made the right decision?

• Yes

• no, committed a Type I error

• no, committed a Type II error

• Cannot be determined

It is a proposed explanation, assertion, or assumption about a population parameter or about the distribution of a random variable.

• decision

• statistics

• probability

• hypothesis

What is the statistical method used in making decisions using experimental data?

• simple analysis

• analytical testing

• hypothesis testing

• experimental testing

It is also the probability of committing an incorrect decision about the null hypothesis.

• level of error

• level of hypothesis

• level of accpetance

• level of significance

Which of the following describes an alternative hypothesis using two-tailed test?

In a one-tailed test, in which critical value listed below will the computed z of 2.313 fall in the acceptance region?

• 1.383

• 1.533

• 2.228

• 2.365

Which of the following would be an appropriate null hypothesis?

• The mean of a sample is equal to 75.

• The mean of a population is equal to 75.

• The mean of a sample is not equal to 75.

• The mean of a population is greater than 75