Description

4/18/22, 8:19 PM

Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Study Guide #5: Prep for Final Exam

Due Apr 25 at 11:59pm

Points 50

Questions 42

Available Jan 5 at 12am – Apr 25 at 11:59pm 4 months

Time Limit 120 Minutes

Allowed Attempts Unlimited

Instructions

Final Exam Study Guide

Take a moment to review the final exam study guide. It lists all topics that will be covered on the final

exam.

Students have unlimited attempts for this assignment. The highest score on this assignment will be used

to calculate the overall course score.

The empirical rule image and the critical value table for correlation will be posted in the Final Exam

header. Additionally, the student t distribution table and the standard normal table (see below) will be

posted in the Final Exam header. If you use INVT then you won’t need the student t distribution table. If

you use NORMALCDF and INVNORM then you won’t need the table standard normal table.

External webcams must be used during all proctored exams. The external webcam must be positioned

so that the instructor can view your desktop.

There are 35 multiple-choice questions on the proctored final exam.

During the Proctored Final Exam, students will have 120 minutes to complete the exam and will only be

able to use the following:

two notecards (3″ by 5 “, front and back)

scratch paper

a calculator

https://artofstat.com/web-apps (https://artofstat.com/web-apps)

Microsoft Excel

Chrome web browser

the empirical rule image, the critical value table for correlation, the student t table, and the standard

normal table are posted in the final exam header

Need Technical Support during the Test? Contact Proctorio 24/7 by:

Live Chat by clicking the Proctorio extension (shield icon in Chrome)

Email support@proctorio.com (mailto:support@proctorio.com)

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Critical Value Table for Correlation

Student T Distribution Table

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Normal Distribution Table

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Take the Quiz Again

Attempt History

LATEST

Attempt

Time

Score

Attempt 1

less than 1 minute

0 out of 50

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Correct answers are hidden.

Score for this attempt: 0 out of 50

Submitted Apr 18 at 8:16pm

This attempt took less than 1 minute.

Unanswered

0 / 1 pts

Question 1

The following grading policy was used in an introductory statistics course.

What is the student’s final course average?

Round to one decimal place.

Student’s Grade Book

Assignments

Homework

95

20%

92

20%

Tests

72

40%

Final Exam

50

20%

Study

Guides

Unanswered

Student

Weights

Averages

Question 2

0 / 1 pts

P(a 40 year old survives the year)=0.999375

Life insurance policy $125,000

Annual Premium $175

What is the expected value of this policy to the insurance company?

(round final answer to two decimal places)

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Question 3

0 / 1 pts

What value is NOT a possible correlation coefficient?

-1

0

0.005

1.056

Unanswered

Question 4

0 / 1 pts

Calculate the linear correlation coefficient for this data set. (round to three

decimal places)

Data

Table

x

y

2 22

5 38

7 45

9 54

11 99

13 103

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Question 5

0 / 1 pts

What rule do we use to determine that there is a linear relationship

between two variables?

If the [ Select ] of the [ Select ] is [ Select ] than the [ Select ] then we can

say that there [ Select ] and that we can use the [ Select ] to calculate the

best predicted value for y.

Otherwise, the best predicted value for y is calculated as the [ Select ] .

Answer 1:

(You left this blank)

Answer 2:

(You left this blank)

Answer 3:

(You left this blank)

Answer 4:

(You left this blank)

Answer 5:

(You left this blank)

Answer 6:

(You left this blank)

Answer 7:

(You left this blank)

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Question 6

0 / 1 pts

Which table do we use to determine whether there is a linear relationship

between two variables, x and y?

critical value table for linear correlation

normal distribution table

student t distribution table

Unanswered

Question 7

0 / 1 pts

This data set has [ Select ] ordered pairs. The critical value used to

determine whether the data set has a linear correlation is [ Select ] .

Since the absolute value of the linear correlation coefficient is [ Select ]

the critical value, then we can say that there [ Select ] and that we can

use the [ Select ] to calculate the best predicted value of y.

Data

Table

x

y

2 22

5 38

7 45

9 54

11 99

13 103

Answer 1:

(You left this blank)

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Answer 2:

(You left this blank)

Answer 3:

(You left this blank)

Answer 4:

(You left this blank)

Answer 5:

(You left this blank)

Unanswered

0 / 1 pts

Question 8

Identify the slope and y-intercept of this data set (round both numbers to

one decimal place).

Slope =

y-intercept =

Using these values, construct the linear regression line for this data set.

x+

Data

Table

x

y

2 22

5 38

7 45

9 54

11 99

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13 103

Answer 1:

(You left this blank)

Answer 2:

(You left this blank)

Answer 3:

(You left this blank)

Answer 4:

(You left this blank)

Unanswered

Question 9

0 / 1 pts

What is the best predicted value for x=5? (round to one decimal place)

Data

Table

x

y

2 22

5 38

7 45

9 54

11 99

13 103

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Question 10

0 / 1 pts

Complete this sentence:

The linear regression line is the one line that

____________________________.

reflects the largest possible sum of the squared residuals.

reflects the smallest possible sum of the squared residuals.

has no connection to the sum of the squared residuals.

Unanswered

Question 11

0 / 1 pts

Which statements are true regarding a residual?

The residual is zero if the observed point lies on the linear regression line.

The residual is negative if the observed point is located BELOW the least

squares regression line.

The residual is positive if the observed point is located ABOVE the least

squares regression line.

Residual=observed y – predicted y

Residual=predicted y – observed y

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Question 12

0 / 1 pts

Calculate the residual for x=5. (round to one decimal place)

Data

Table

x

y

2 22

5 38

7 45

9 54

11 99

13 103

Unanswered

Question 13

0 / 1 pts

Approximately ____% of the area under the normal curve is between

.

Unanswered

Question 14

0 / 1 pts

Find the area under the standard normal curve between

Round to 4 decimal places.

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Question 15

0 / 1 pts

Find the sum of the areas under the standard normal curve to the left of

and to the right of

Round to 4 decimal places.

Unanswered

Question 16

0 / 1 pts

Assume that the random variable X is normally distributed, with the

following population parameters:

Compute the probability

Round to 4 decimal places.

Unanswered

Question 17

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0 / 1 pts

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Assume that the random variable X is normally distributed with a

population mean of 100 and a population standard deviation of 15.

Compute the probability

Round to 4 decimal places.

Unanswered

Question 18

0 / 1 pts

The number of violent crimes committed in a day possesses a distribution

with a mean of 10 crimes per day and a standard deviation of 5 crimes per

day. A random sample of 100 days was observed, and the mean number

of crimes for the sample was calculated. Describe the sampling

distribution of the sample mean.

shape unknown with mean = 10 and standard deviation = 5

shape unknown with mean = 10 and standard deviation = 0.5

approximately normal with mean = 10 and standard deviation = 5

approximately normal with mean = 10 and standard deviation = 0.5

Unanswered

Question 19

0 / 1 pts

Textbook prices are normally distributed with a mean of 250 dollars and a

standard deviation of 20 dollars. If 25 textbooks are randomly selected,

find the probability that the sample has a mean cost between 245 dollars

and 255 dollars.

Round to 4 decimal places.

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

Question 20

0 / 1 pts

To assess attitudes towards issues that affect the residents of a village,

the village randomly chose 525 families to participate in a survey of life

attitudes. The village received 150 completed surveys. What is the sample

proportion of completed surveys?

Round to 3 decimal places.

Unanswered

Question 21

0 / 1 pts

The FSW Bookstore determined that 65% of the FSW students stated that

they were satisfied with customer service. A random sample of 700

students was selected from a population of 10,000 students. The sample

proportion of students who said they were satisfied with customer service

is calculated. Determine the shape of the sampling distribution of the

sample proportion.

The shape of the sampling distribution is approximately normal.

The shape of the sampling distribution is exactly normal.

The shape of the sampling distribution is NOT normal because n > 0.05N

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The shape of the sampling distribution is NOT normal because np(1-p) 0.05N

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Study Guide #5: Prep for Final Exam: (Spring 2022-1) STA2023: STATISTICAL METHODS I 805 (21675)

The shape of the sampling distribution is NOT normal because np(1-p)

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