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)
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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)
Score for this attempt: 0 out of 50
Submitted Apr 18 at 8:16pm
This attempt took less than 1 minute.
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.
Assignments
Homework
95
20%
92
20%
Tests
72
40%
Final Exam
50
20%
Study
Guides
Student
Weights
Averages
Question 2
0 / 1 pts
P(a 40 year old survives the year)=0.999375
Life insurance policy \$125,000
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
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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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 ] .
(You left this blank)
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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
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
(You left this blank)
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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
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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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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.
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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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
Question 13
0 / 1 pts
Approximately ____% of the area under the normal curve is between
.
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.
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.
Question 17
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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.
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
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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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.
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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The shape of the sampling distribution is NOT normal because np(1-p)