STATS Week 14 Quiz Questions 2015

| August 30, 2017

Question
1. THE FOLLOWING IS THE QUESTIONS THAT HAD INFORMATION/DATA MISSING. FOLLOWING THAT THERE IS A NEW SET OF QUESTIONS. THANK YOU!

Use the regression equation to predict the value of y for x=-0.2. Assume that the variables x and y have a significant correlation.
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A.

1.135

B.

0.381

C.

-2.037

D.

1.733

Provide an appropriate response.
Match the regression equation with the appropriate graph. (Note that the x- and y-axes are broken.)
= 1.72x+ 84.99

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A.

B.

C.

D.

Provide an appropriate response.

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Find the equation of the regression line for the given data.

A.

=-1.885x+ 0.758

B.

=-0.758x- 1.885

C.

= 0.758x+ 1.885

D.

= 1.885x- 0.758

Provide an appropriate response.
Calculate the correlation coefficient, r, for the data below.

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A.

0.819

B.

0.881

C.

0.792

D.

0.990

Provide an appropriate response.
Given the supply of a commodity, x, and the price of a commodity, y, would you expect a positive correlation, a negative correlation, or no correlation?

A.

positive correlation

B.

no correlation

C.

negative correlation

NEW QUESTIONS FOR THE CURRENT PRICE LISTED FOR THIS SET OF QUESTIONS

Question 1Provide an appropriate response. SELF-CHECK QUIZ

Find the standardized test statistic t for a sample with n= 12,= 31.2, s= 2.2, and ?= 0.01 if Round your answer to three decimal places.

A.

2.001

B.

1.991

C.

1.890

D.

2.132

2 points

Question 2.open.suny.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_151825_1&course_id=_5753_1&content_id=_1092834_1&step=null”>

Provide an appropriate response.

Find the standardized test statistic t for a sample with n= 10,= 16.5, s= 1.3, and if Round your answer to three decimal places.

A.

-3.186

B.

-2.189

C.

-3.010

D.

-2.617

2 points

Question 3

Provide an appropriate response.
Find the critical value and rejection region for the type of t-test with level of significance ? and sample size n.
Right-tailed test, ?= 0.1, n= 35

A.

t0= 2.441; t> 2.441

B.

t0= 1.306; t> 1.306

C.

t0= 1.307; t 1.307

2 points

Question 4

Provide an appropriate response.
Find the standardized test statistic t for a sample with n= 15,= 7.2, s= 0.8, and if Round your answer to three decimal places.

A.

1.631

B.

1.452

C.

1.312

D.

1.728

2 points

Question 5

Provide an appropriate response.
Find the critical value and rejection region for the type of t-test with level of significance ? and sample size n.

Left-tailed test, ?= 0.1, n= 22

A.

t0= 1.323; t> 1.323

B.

t0=-1.321; t<-1.321

C.

t0=-1.323; t<-1.323

D.

t0=-2.518; t 2.026

B.

t0=-2.024, t0= 2.024; t 2.024

C.

t0=-2.026, t0= 2.026; t 2.026

D.

t0=-1.687, t0= 1.687; t 1.687

HW

Provide an appropriate response.
The Metropolitan Bus Company claims that the mean waiting time for a bus during rush hour is less than 5 minutes. A random sample of 20 waiting times has a mean of 3.7 minutes with a standard deviation of 2.1 minutes. At ?= 0.01, test the bus company’s claim. Assume the distribution is normally distributed.
Question 2.open.suny.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_151846_1&course_id=_5753_1&content_id=_1092875_1&step=null”>

Provide an appropriate response.
Find the critical value and rejection region for the type of t-test with level of significance ? and sample size n.

Two-tailed test, ?= 0.05, n= 38

A.

t0=-1.687, t0= 1.687; t 1.687

B.

t0= 2.026; t> 2.026

C.

t0=-2.024, t0= 2.024; t 2.024

D.

t0=-2.026, t0= 2.026; t 2.026

Question 3

Provide an appropriate response.
Find the standardized test statistic t for a sample with n= 15,= 7.2, s= 0.8, and if Round your answer to three decimal places.

A.

1.312

B.

1.452

C.

1.631

D.

1.728

Question 4

Provide an appropriate response.
A local school district claims that the number of school days missed by its teachers due to illness is below the national average of ?= 5. A random sample of 28 teachers provided the data below. At ?= 0.05, test the district’s claim using P-values.

0 3 6 3 3 5 4 1 3 5
7 3 1 2 3 3 2 4 1 6
2 5 2 8 3 1 2 5

Question 5

Provide an appropriate response.
Find the standardized test statistic t for a sample with n= 10,= 16.5, s= 1.3, and if Round your answer to three decimal places.

A.

-2.189

B.

-3.186

C.

-3.010

D.

-2.617

QUIZ

Question 1.open.suny.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_151840_1&course_id=_5753_1&content_id=_1092906_1&step=null”>

Provide an appropriate response.
Find the standardized test statistic t for a sample with n= 25,= 28, s= 3, and ?= 0.005 if Round your answer to three decimal places.

A.

1.667

B.

1.452

C.

1.239

D.

1.997

Question 2.open.suny.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_151840_1&course_id=_5753_1&content_id=_1092906_1&step=null”>

Provide an appropriate response.
Find the critical value and rejection region for the type of t-test with level of significance ? and sample size n.
Left-tailed test, ?= 0.1, n= 22

A.

t0= 1.323; t> 1.323

B.

t0=-1.321; t<-1.321

C.

t0=-2.518; t<-2.518

D.

t0=-1.323; t

Provide an appropriate response.
Find the standardized test statistic t for a sample with n= 15,= 7.2, s= 0.8, and if Round your answer to three decimal places.

A.

1.312

B.

1.728

C.

1.452

D.

1.631

Question 4.open.suny.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_151840_1&course_id=_5753_1&content_id=_1092906_1&step=null”>

Provide an appropriate response.
Find the critical value and rejection region for the type of t-test with level of significance ? and sample size n.
Right-tailed test, ?= 0.1, n= 35

A.

t0= 2.441; t> 2.441

B.

t0= 1.307; t> 1.307

C.

t0= 1.307; t 1.306

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