Question 1

If researchers report that the results from their study were significant, p ​

Accepted Answer

A) if they conducted the study over they would get the same results less than 5 times in 100. 
B) the results are untrustworthy. 
C) we would expect the results to occur by chance less than 95 times out of 100. 
D) we would expect the results to occur by chance less than 5 times out of 100.

Question 2

Imagine that you have a bag filled with 10 pink marbles and 5 black marbles. What is the probability of pulling a pink marble from the bag?​

Accepted Answer

A) 0.25​ 
B) 0.33 
C) 0.50 
D) 0.67

Question 3

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 600 or higher on the test?​

Accepted Answer

A) 0.0005 
B) 0.002 
C) 0.025 
D) 0.045

Question 4

Explain how a one-tailed hypothesis differs from a two-tailed hypothesis.​

Accepted Answer

The answer of Explain how a one-tailed hypothesis differs from...

Question 5

One- and two-tailed hypotheses are both types of _____ hypotheses.​

Accepted Answer

A) null 
B) alternative 
C) directional 
D) nondirectional

Question 6

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower on the test?​

Accepted Answer

A) 0.84 
B) 0.50 
C) 0.16 
D) 0.34

Question 7

Explain the difference between the null hypothesis and the alternative hypothesis in a study.​

Accepted Answer

The answer of Explain the difference between the null hypothesis...

Question 8

When using a _____ hypothesis, the researcher predicts that the groups being compared will differ, but does not predict how they will differ.

Accepted Answer

A) null 
B) directional​ 
C) one-tailed 
D) two-tailed

Question 9

_____ are most often used with interval or ratio data whereas _____ are most often used with ordinal or nominal data.​

Accepted Answer

A) t tests; z tests 
B) z tests; t tests 
C) Parametric tests; nonparametric tests 
D) Nonparametric tests; parametric tests

Question 10

If a researcher decides to use the 0.01 level of significance rather than using the more conventional 0.05 level of significance, what type of error is more likely to be made? Why?​

Accepted Answer

The answer of If a researcher decides to use the...

Question 11

Imagine that I have a jar that contains 20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip followed by a black poker chip?

Accepted Answer

The answer of Imagine that I have a jar that...

Question 12

What is the probability of rolling an even number in a single roll of a die?​

Accepted Answer

A) 0.25 
B) 0.17 
C) 0.50 
D) 0.36

Question 13

The hypothesis predicting that differences exist between the groups being compared is to the hypothesis predicting that no differences exist between the groups being compared as _____ hypothesis is to _____ hypothesis.​

Accepted Answer

A) null; alternative 
B) alternative; null 
C) one-tailed; two-tailed 
D) two-tailed; one-tailed

Question 14

What is the probability of rolling a two-digit number in a single roll of a die?

Accepted Answer

A) 0 
B) 1.0 
C) 0.50 
D) 0.25

Question 15

When the probability of a Type I error is 0.05 or less, we say that we have observed _____.​

Accepted Answer

A) a Type II error​ 
B) statistical significance 
C) the alternative hypothesis 
D) all of the above

Question 16

A false alarm is to a(n) _____ as a miss is to a(n) _____.​

Accepted Answer

A) Type I error; Type II error 
B) Type II error; Type I error 
C) null hypothesis; alternative hypothesis 
D) alternative hypothesis; null hypothesis

Question 17

In a recent study, researchers concluded that exercise significantly lowered stress levels. What the researchers were unaware of, however, was that several of the participants in the exercise group were also taking anti-anxiety medications. The researchers' conclusion is a(n) _____ error.​

Accepted Answer

A) Type II 
B) Type I 
C) null hypothesis 
D) alternative hypothesis

Question 18

What is the probability of a couple having either a girl or a boy when giving birth?​

Accepted Answer

A) 0.25 
B) 0.50 
C) 0.75 
D) 1.0

Question 19

H0 is to Ha as _____ hypothesis is to _____ hypothesis.​

Accepted Answer

A) null; alternative 
B) alternative; null 
C) one-tailed; two-tailed 
D) two-tailed; one-tailed

Question 20

_____ statistics are used in the process of hypothesis testing.​

Accepted Answer

A) Descriptive​ 
B) Null 
C) Alternative 
D) Inferential

Exam 7: Probability and Hypothesis Testing

If researchers report that the results from their study were significant, p

Imagine that you have a bag filled with 10 pink marbles and 5 black marbles. What is the probability of pulling a pink marble from the bag?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 600 or higher on the test?

Explain how a one-tailed hypothesis differs from a two-tailed hypothesis.

One- and two-tailed hypotheses are both types of _____ hypotheses.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower on the test?

Explain the difference between the null hypothesis and the alternative hypothesis in a study.

When using a _____ hypothesis, the researcher predicts that the groups being compared will differ, but does not predict how they will differ.

_ are most often used with interval or ratio data whereas _ are most often used with ordinal or nominal data.

If a researcher decides to use the 0.01 level of significance rather than using the more conventional 0.05 level of significance, what type of error is more likely to be made? Why?

Imagine that I have a jar that contains 20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip followed by a black poker chip?

What is the probability of rolling an even number in a single roll of a die?

The hypothesis predicting that differences exist between the groups being compared is to the hypothesis predicting that no differences exist between the groups being compared as _ hypothesis is to _ hypothesis.

What is the probability of rolling a two-digit number in a single roll of a die?

When the probability of a Type I error is 0.05 or less, we say that we have observed _____.

A false alarm is to a(n) _ as a miss is to a(n) _.

In a recent study, researchers concluded that exercise significantly lowered stress levels. What the researchers were unaware of, however, was that several of the participants in the exercise group were also taking anti-anxiety medications. The researchers' conclusion is a(n) _____ error.

What is the probability of a couple having either a girl or a boy when giving birth?

H₀ is to H_a as _ hypothesis is to _ hypothesis.

_____ statistics are used in the process of hypothesis testing.

Exam 7: Probability and Hypothesis Testing

If researchers report that the results from their study were significant, p ​

Imagine that you have a bag filled with 10 pink marbles and 5 black marbles. What is the probability of pulling a pink marble from the bag?​

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 600 or higher on the test?​

Explain how a one-tailed hypothesis differs from a two-tailed hypothesis.​

One- and two-tailed hypotheses are both types of _____ hypotheses.​

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower on the test?​

Explain the difference between the null hypothesis and the alternative hypothesis in a study.​

When using a _____ hypothesis, the researcher predicts that the groups being compared will differ, but does not predict how they will differ.

_____ are most often used with interval or ratio data whereas _____ are most often used with ordinal or nominal data.​

If a researcher decides to use the 0.01 level of significance rather than using the more conventional 0.05 level of significance, what type of error is more likely to be made? Why?​

Imagine that I have a jar that contains 20 black poker chips and 40 red poker chips. What is the probability of selecting a red poker chip followed by a black poker chip?

What is the probability of rolling an even number in a single roll of a die?​

The hypothesis predicting that differences exist between the groups being compared is to the hypothesis predicting that no differences exist between the groups being compared as _____ hypothesis is to _____ hypothesis.​

What is the probability of rolling a two-digit number in a single roll of a die?

When the probability of a Type I error is 0.05 or less, we say that we have observed _____.​

A false alarm is to a(n) _____ as a miss is to a(n) _____.​

In a recent study, researchers concluded that exercise significantly lowered stress levels. What the researchers were unaware of, however, was that several of the participants in the exercise group were also taking anti-anxiety medications. The researchers' conclusion is a(n) _____ error.​

What is the probability of a couple having either a girl or a boy when giving birth?​

H0 is to Ha as _____ hypothesis is to _____ hypothesis.​

_____ statistics are used in the process of hypothesis testing.​

If researchers report that the results from their study were significant, p

Imagine that you have a bag filled with 10 pink marbles and 5 black marbles. What is the probability of pulling a pink marble from the bag?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 400 or lower followed by selecting a student whose score is 600 or higher on the test?

Explain how a one-tailed hypothesis differs from a two-tailed hypothesis.

One- and two-tailed hypotheses are both types of _____ hypotheses.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower on the test?

Explain the difference between the null hypothesis and the alternative hypothesis in a study.

_ are most often used with interval or ratio data whereas _ are most often used with ordinal or nominal data.

If a researcher decides to use the 0.01 level of significance rather than using the more conventional 0.05 level of significance, what type of error is more likely to be made? Why?

What is the probability of rolling an even number in a single roll of a die?

The hypothesis predicting that differences exist between the groups being compared is to the hypothesis predicting that no differences exist between the groups being compared as _ hypothesis is to _ hypothesis.

When the probability of a Type I error is 0.05 or less, we say that we have observed _____.

A false alarm is to a(n) _ as a miss is to a(n) _.

In a recent study, researchers concluded that exercise significantly lowered stress levels. What the researchers were unaware of, however, was that several of the participants in the exercise group were also taking anti-anxiety medications. The researchers' conclusion is a(n) _____ error.

What is the probability of a couple having either a girl or a boy when giving birth?

H₀ is to H_a as _ hypothesis is to _ hypothesis.

_____ statistics are used in the process of hypothesis testing.