Statistics PSY302 Quiz Chapters 16 & 17. 1. Alpha α is also known as: A.The null hypopthesis B.Chi...

Statistics PSY302 Quiz Chapters 16 & 17

1. Alpha α is also known as:

A. The null hypopthesis

B. Chi Square

C. The significance level

D. The Analysis of Variance

E. B and D

1. Alpha α is also known as:

A. The null hypopthesis

B. Chi Square

C. The significance level

D. The Analysis of Variance

E. B and D

2. The ____ tells us the likelihood of getting a value as high as the test statistic by chance.

• null hypothesis• margin of error• P-value• sampling distribution• confidence interval

2. The ____ tells us the likelihood of getting a value as high as the test statistic by chance.

• null hypothesis• margin of error• P-value• sampling distribution• confidence interval

3. It the p-value is ______, then we say the data are statistically significant.

• Equal to the mean• as small as or smaller than α• Greater than the obtained

statistic• Larger than alpha• greater than .05

3. It the p-value is ______, then we say the data are statistically significant.

• Equal to the mean• as small as or smaller than α• Greater than the obtained

statistic• Larger than alpha• greater than .05

4. Which of the following graphs could be a t-distribution?

a) Plot A

b) Plot B

c) Plot C

Which of the following graphs could be a t-distribution?

a) Plot A

b) Plot B

c) Plot C

4. We use t scores when:

1. We want to talk about values rather than a claim about the relationship

2. We want to predict the value3. The population standard deviation is unknown4. We are concerned about chance5. We have categorical data

4. We use t scores when:

1. We want to talk about values rather than a claim about the relationship

2. We want to predict the value3. The population standard deviation is unknown4. We are concerned about chance5. We have categorical data

5. The proper T distribution is decided by:

1. The P-value2. The significance level3. The confidence interval4. Degrees of freedom5. Square root of N.

5. The proper T distribution is decided by:

1. The P-value2. The significance level3. The confidence interval4. Degrees of freedom5. Square root of N.

6. To compare the responses to the two treatments in _____ design, apply the one-sample

t procedures to the observed differences.

1. P-value2. significance level3. confidence interval4. Degrees of freedom5. Matched pairs

6. To compare the responses to the two treatments in _____ design, apply the one-sample

t procedures to the observed differences.

1. P-value2. significance level3. confidence interval4. Degrees of freedom5. Matched pairs

7. Do these data show if the average score on music is different from that for flower. This would

be a _____ hypothesis.

A. One-tail

B. Two-tail

C. Both of the above

D. Neither of the above

Student Flowr% music%Baldwin, David C 30% 20%Cardona, Camille Tai 40% 30%Carter, Hayley Noell 40% 30%Dew, Dougie Brendan 60% 10%Harber, Hannah Taylo 70% 60%Hendrix, Amber Nicol 45% 0%Lazarus, Le'ondra He 40% 10%Persohn, Ashley Dani 60% 20%Radke, Carrie Nicole 50% 20%Richardson, Jordan R 50% 30%Roberson, Jasmine Mi 70% 20%Scott, Shannon Lasha 40% 30%Smith, Lindsay Eliza 30% 40%Smith, Lindsay Nicol 100% 20%Watson, Jacqueline 30% 50%Williams, Travis EdwWise, Alisha 100% 100%

7. Do these data show if the average score on music is different from that for flower. This would

be a _____ hypothesis.

A. One-tail

B. Two-tail

C. Both of the above

D. Neither of the above

8. A t-test comparing flower trvia to music trivia would require a _____t-test.

A. Matched Pairs

B. One-sample

C. Independent Samples

8. A t-test comparing flower trvia to music trivia would require a _____t-test.

A. Matched Pairs

B. One-sample

C. Independent Samples

9. A Z score of .50 means

1. 50 points above the average of the sample

2. Way, way above average

3. One half a standard deviation above the mean

4. All of the above

9. A Z score of .50 means

1. 50 points above the average of the sample

2. Way, way above average

3. One half a standard deviation above the mean

4. All of the above

10. Degrees of freedom is determined by:

1. The variance2. Sample size3. The square root of n4. T distribution5. The null hypothesis

10. Degrees of freedom is determined by:

1. The variance2. Sample size3. The square root of n4. T distribution5. The null hypothesis

Bonus: To these data show that students score higher on one quiz than the other?

A. Yes

C. Can’t say

t-Test: Paired Two Sample for Means

Flowr% music%Mean 0.534375 0.30625Variance 0.049573 0.056625Observations 16 16Pearson Correlation 0.379455Hypothesized Mean Difference 0df 15t Stat 3.552182P(T<=t) one-tail 0.001448t Critical one-tail 1.75305P(T<=t) two-tail 0.002896t Critical two-tail 2.13145