MATH 221B
Brigham Young University
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L24 Quiz_ Group Meeting_ Biostatistics.
- Exam (elaborations) • 21 pages • 2022
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Question 1 1 / 1 pts 
I met with my group and completed this Group Quiz with them. 
True 
False 
Ques 1 / 1 pts tion 2 
Which of the following variables is/are quantitative? (Mark all that apply) 
The telephone number of a randomly selected business in town. The 3 most common brands of car found in the US. 
The number of people in a randomly selected classroom on campus. 
Ques 1 / 1 pts tion 3 
Students in an Introductory Statistics class at BYU-Idaho were studying prices of 
cold cereal at groc...
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L17 Quiz_ Group Meeting_Biostatistics
- Exam (elaborations) • 9 pages • 2022
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Question 1 
 I completed the Individual Preparation assignment before 
attending the Group Meeting. 
 True 
 False 
2 / 2 pts Question 2 
I actively participated in this week's Group Meeting. 
 True 
 False 
This study source was downloaded by from CourseH on 11-30-2022 03:33:23 GMT -06:00 

6/18/2019 Ezeakiel Machado Dreger's Quiz History: L17 Quiz: Group Meeting 

While you are required to work together on this quiz, each 
member of the group must submit his or her own answers in 
order to ...
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MATH 221B L16 Quiz_ Homework_ Biostatistics.
- Exam (elaborations) • 8 pages • 2022
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Use the following information to answer the next 4 
questions. 
First Data Corp. records indicate that in 2005, 43% of adult 
email users received a phishing email. A phishing email 
replicates an authentic site for the purpose of stealing 
personal information such as account numbers and 
passwords. Suppose a random sample of 800 adults will be 
surveyed on whether they have received phishing emails to 
determine recent trends. 
Question 1 1 / 1 pts 
This study source was downloaded by from Co...
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MATH 221B Group Quiz #19
- Exam (elaborations) • 7 pages • 2022
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Question 1 2 / 2 pts 
I completed the Individual Preparation assignment before attending the 
Group Meeting. 
Correct! True 
False 
Question 2 2 / 2 pts 
I actively participated in this week's Group Meeting. 
Correct! True 
False 
While you are required to work together on this quiz, each member of the 
group must submit his or her own answers in order to receive credit. 
If needed, here's a link to the Normal Probability Applet . 
You will need the following data set: 
C 
When calculating any...
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MATH 221B/L23 Quiz_ Homework_Biostatistics questions with correct answers)GRADED A
- Exam (elaborations) • 6 pages • 2022
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Question 1 
What is the y-intercept of the equation? (Round your answers to three decimal 
places, Example: 23.456) 
33.474 
1 / 1 pts Question 2 
What is the slope of the equation? (Round your answers to three decimal places, 
Example: 23.456) 
This study source was downloaded by from CourseH on 11-30-2022 03:25:38 GMT -06:00 

10.73 
1 / 1 pts Question 3 
What is the lower bound of the confidence interval? (Round your answers to three 
decimal places, Example: 23.445) 
10.11 
1 / 1 pts Questi...
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MATH 221B L22 Quiz_ Homework_ Biostatistics.
- Exam (elaborations) • 5 pages • 2022
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Question 1 1 / 1 pts 
Given the linear regression equation, Y^=134.63−2.79X, what is the predicted 
value of Y^ when X=45? (Round answer to two decimal places, Example: 3.45) 
9.08 
Ques 1 / 1 pts tion 2 
Students in an Econometrics class recorded their income, , and the total amount 
of money they spent, , for one week (in dollars.) Based on these data, the linear 
regression line was calculated as: . 
Choose the correct interpretation of the slope of the regression line. 
x 
y 
y^=51.24+0.87...
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MATH 221B L21 Quiz_ Homework
- Exam (elaborations) • 6 pages • 2022
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On this quiz, you may use your notes, but you should complete the quiz without 
help from others. This quiz is a tool to help you and your instructor gauge your 
progress. 
If needed, here's a link to the Normal Probability Applet . 
You will need the following data sets: 
MadisonCountyRealE 
BodyMeasurementsC 
When calculating anything, please remember to round to three decimal places, 
unless otherwise specified. DO NOT ROUND until your calculation is complete. 
This study source was download...
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L23 Quiz_ Group Meeting_ Biostatistics.
- Exam (elaborations) • 7 pages • 2022
- Available in package deal
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Question 1 2 / 2 pts 
 I completed the Individual Preparation assignment before attending the Group 
Meeting. 
True 
False 
Ques 2 / 2 pts tion 2 
I actively participated in this week's Group Meeting. 
True 
False 
Ques 1 / 1 pts tion 3 
This study source was downloaded by from CourseH on 11-30-2022 03:10:41 GMT -06:00 

The true linear regression equation is , where and are 
unknown. What are the null and alternative hypotheses for ? 
Y=β0+β1X β0 β1 
β1 
H0:β1≠0 Ha:β1<0 H0:β1=0 H...
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L22 Quiz_ Group Meeting_ Biostatistics
- Exam (elaborations) • 5 pages • 2022
- Available in package deal
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- $8.49
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Question 1 2 / 2 pts 
 I completed the Individual Preparation assignment before attending the Group 
Meeting. 
True 
False 
Question 2 2 / 2 pts 
I actively participated in this week's Group Meeting. 
True 
False 
While you are required to work together on this quiz, each member of the group 
must submit his or her own answers in order to receive credit. 
If needed, here's a link to the Normal Probability Applet . 
You will need the following data set 
MathSelfE 
When calculating anything, ple...
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