Hypothesis Tests

Question 1

An assumption made about the value of a population parameter is called a

Answer 1

hypothesis

Question 2

In hypothesis testing if the null hypothesis is rejected,

Answer 2

the alternative hypothesis is true

Question 3

The average monthly rent for one-bedroom apartments in Chattanooga has been $700. Because of the downturn in the real estate market, it is believed that there has been a decrease in the average rental. The correct hypotheses to be tested are

Answer 3

H0: mean >/= 700 Ha: mean

Question 4

The average hourly wage of computer programmers with 2 years of experience has been $21.80. Because of high demand for computer programmers, it is believed there has been a significant increase in the average wage of computer programmers. To test whether or not there has been an increase, the correct hypotheses to be tested are

Answer 4

H0: mean 21.80

Question 5

The probability of committing a Type I error when the null hypothesis is true is

Answer 5

the Level of Significance

Question 6

The level of significance is the

Answer 6

maximum allowable probability of Type I error

Question 7

The error of rejecting a true null hypothesis is

Answer 7

a Type I error

Question 8

The level of significance

Answer 8

is (1 - confidence level)

Question 9

The probability of making a Type I error is denoted by

Answer 9

alpha

Question 10

In the hypothesis testing procedure, alpha is

Answer 10

the level of significance

Question 11

If a hypothesis is rejected at the 5% level of significance, it

Answer 11

may be rejected or not rejected at the 1% level

Question 12

If a hypothesis is rejected at 95% confidence, it

Answer 12

will always be rejected at 90% confidence

Question 13

For a lower tail test, the p-value is the probability of obtaining a value for the test statistic

Answer 13

at least as small as that provided by the sample

Question 14

The p-value

Answer 14

is a probability

Question 15

When the following hypotheses are being tested at a level of significance of alpha
H0: mean >/= 500 Ha: mean < 500
the null hypothesis will be rejected if the p-value is

Answer 15

</= alpha

Question 16

In order to test the following hypotheses at an alpha level of significance H0: mean 800
the null hypothesis will be rejected if the test statistic Z is

Answer 16

> /= Za

Question 17

As the test statistic becomes larger, the p-value

Answer 17

gets smaller

Question 18

For a lower bounds one-tailed test, the test statistic z is determined to be zero. The p-value for this test is

Answer 18

+0.5

Question 19

For a one-tailed test (lower tail) at 93.7% confidence, Z =

Answer 19

-1.53

Question 20

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

Answer 20

should not be rejected

Question 21

For a one-tailed test (lower tail) at 89.8% confidence, Z =

Answer 21

-1.27

Question 22

For a one-tailed hypothesis test (upper tail) the p-value is computed to be 0.034. If the test is being conducted at 95% confidence, the null hypothesis

Answer 22

is rejected

Question 23

In a one-tailed hypothesis test (lower tail) the test statistic is determined to be -2. The p-value for this test is

Answer 23

0.0228

Question 24

In a two-tailed hypothesis test situation, the test statistic is determined to be t = -2.692. The sample size has been 45. The p-value for this test is

Answer 24

+0.01

Question 25

For a two-tailed test, a sample of 20 at 80% confidence, t =

Answer 25

1.328

Question 26

For a one-tailed test (lower tail), a sample size of 10 at 90% confidence, t =

Answer 26

-1.383

Question 27

For a one-tailed test (lower tail) with 22 degrees of freedom at 95% confidence, the value of t =

Answer 27

-1.717