Answered: A. -0.06 B. 0 C. 0.11 21. Which of the… | bartleby

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 23PPS

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Answer 21-24 thank you

10. The direction of the points around the line in a scatter plot suggests the
of the variables.
C. trend
B. shape
A. fo
D. vation/strength
11. If the points the scatter graph rise from left to right, then the variables inve have a
correlation.
J. Zero
C. positive
A. moderate
B. negligible
of the
s to the trend on a
12. The strength of the colation is associated with the
scatter plot.
D. number
C. form
B. action
A. closeness
13. Noah noticed that the points
a scatter plot follow and rising from right to left. He also
noticed that the points are plotted losely around the trid line. What is the correlation of the
variables involved?
C. weak negative
A. strong negative
B. strong positive
D. weak positive
14. If the points on the scatter plot fall almost
ne, then the variables are said to have
correlation.
D. strong
C. positive
A. negative
B. perfect
15. Joan noticed that the high value of e variable
responds to high value of the second variable
or low value of the first corresponds low value of send variable. What conclusion can you draw
from the direction of correlation?
B. he variables have positive correlation.
D. T variables have moderate correlation.
A. The variables have 7 o correlation.
C. The variables have negative correlation.
16. Which of the following used to measure the strength the association between bivariate
data?
B. diagram
A. z - value
C. Pearson -
D. Pearson's ample correlation coefficient
17. In the formula of earson r, what is the meaning of Exy?
A. sum of x-va des
B. sum of square x-valus
C. sum of the square of paired values x and y
18. In computing Pearson r, which of the following
entries in all col mns in the table?
D. sum of the products of paired values x and y
is the next step after obtaining the sum of all
A. Construct a table.
B. Complete the table.
C. Sinplify and compute for the value of r.
19. Which of he following is the range of the correlation
B. 1 ≤rs-1
D. Substitute all the sum and n in the formula.
coefficient (r)?
C. -1 <r < 1
Asrs 1
D. -1 ≤rs 1
20. Using the given summation values below, what is the value of Pearson r?
n = 3 Σχ = 10 Σy = 15 Σxy = 60 Ex? = 14 Σy2 = 450
A. -0.06
B. O
C. 0.11
D. 1
21. Which of the following statements about correlation is NOT correct?
A. Every correlation has strength only.
B. Correlation is a number from -1 and 1.
C. A correlation can either be positive or negative.
D. Correlation determines the direction between two variables
22. Miguel needs to analyze the strength of the relationship between two variables. What is the
correct statistical method he needs to conduct?
A. Z-test
B. Pearson co
C. Pearson alpha
D. Pearson's sample correlation coefficient
23. Which of the following Pearson coefficients is considered having the weakest negative
correlation?
A. 0.45
B. -0.1
24. There is a survey indicating that as weather gets colder, air-conditioning
C. -0.45
D. -0.98
costs decrease. Which
of the following values of r is appropriate to the result of the survey?
C. 0.19
A. -0.93
B. 0
D. 0.87
25. The correlation coefficient r between the number of bags of popcorn and the number of sodass
sold at each performance of the circus over one week was found to be 0.62. Which conclusion can
be drawn from the result?
A. There is no correlation between popcorn sales and soda sales.
B. There is a strong positive correlation between popcorn sales and soda sales.
C. There is a weak positive correlation between popcorn sales and soda sales.
D. There is a strong negative correlation between popcorn sales and soda sales.

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