39. Which of the following probability distribution curves has the lowest peak? A. the standard normal distribution B. at-distribution with 10 degrees of freedom C. at-distribution with 15 degrees of freedom D. at-distribution with 20 degrees of freedom

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39. Which of the following probability distribution curves has the lowest peak?
A. the standard normal distribution
В.
a t-distribution with 10 degrees of freedom
C. at-distribution with 15 degrees of freedom
D. a t-distribution with 20 degrees of freedom
40. What is the degree of freedom in a set of data if the sample size is 197
A. 17
B. 18
C. 19
D. 20
41. Given an area of 0.01 and degrees of freedom of 9, what is the t-value?
C. 2.764
A. 2.681
B. 2.718
D. 2.821
42. What is the 90th percentile of the t-distribution with 10 degrees of freedom?
В. 1.372
A. 1.363
С. 1.383
D. 1.812
43. To what percentile of the t-distribution does 2.583 belong to if the sample size is 17?
A. 75h
B. 90
C. 95h
D. 99th
44. Which formula is to be used in finding the length of a confidence interval?
A. LCI =|LCL-UCLI
C. LCI = 2za/2)
B.LCI = 2t
D. all of them
45. What is the length of the confidence interval given the following data: o = 0.5, n = 70,
confidence level = 95%?
A. 0.17
В. О.18
C. 0.19
D. 0.23
46. Which formula is used in determining the minimum size needed when estimating the population mean?
Za2
A.
•n
B.
C.
D.
E
For numbers 47 to 49, refer to the given problem.
A survey on 200 GAS students of Masipag Senior High School shows that they read on an average of 15. 7
hours per week. The margin of error is 2.4 hours at a 95% confidence level.
47. What is the value of the margin of error?
А. 2.2
В. 2.4
С. 15.7
D. 16.3
Transcribed Image Text:39. Which of the following probability distribution curves has the lowest peak? A. the standard normal distribution В. a t-distribution with 10 degrees of freedom C. at-distribution with 15 degrees of freedom D. a t-distribution with 20 degrees of freedom 40. What is the degree of freedom in a set of data if the sample size is 197 A. 17 B. 18 C. 19 D. 20 41. Given an area of 0.01 and degrees of freedom of 9, what is the t-value? C. 2.764 A. 2.681 B. 2.718 D. 2.821 42. What is the 90th percentile of the t-distribution with 10 degrees of freedom? В. 1.372 A. 1.363 С. 1.383 D. 1.812 43. To what percentile of the t-distribution does 2.583 belong to if the sample size is 17? A. 75h B. 90 C. 95h D. 99th 44. Which formula is to be used in finding the length of a confidence interval? A. LCI =|LCL-UCLI C. LCI = 2za/2) B.LCI = 2t D. all of them 45. What is the length of the confidence interval given the following data: o = 0.5, n = 70, confidence level = 95%? A. 0.17 В. О.18 C. 0.19 D. 0.23 46. Which formula is used in determining the minimum size needed when estimating the population mean? Za2 A. •n B. C. D. E For numbers 47 to 49, refer to the given problem. A survey on 200 GAS students of Masipag Senior High School shows that they read on an average of 15. 7 hours per week. The margin of error is 2.4 hours at a 95% confidence level. 47. What is the value of the margin of error? А. 2.2 В. 2.4 С. 15.7 D. 16.3
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