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A sample of 200 beginning typing students is selected and randomly assigned to learn typing on one of two keyboards. The management would like to know that the keyboard arrangement and the learning times are independent. The learning times for this sample are summarized in the following contingency table. The observed values are bold, and its respective expected frequency is the value given in parenthesis. Learning times 41-60 h 21-40 h 33 (36) 57 (54) keyboard 61-80 h Row total 30 (20) 20 (30) A P 80 B 120 Column total 90 60 50 (i) Find the observed value and expected frequency in the cell labelled P and Q. (ii) Conduct the chi-square test at a = 0.005 .

A sample of 200 beginning typing students is selected and randomly assigned to learn typing on one of two keyboards. The management would like to know that the keyboard arrangement and the learning times are independent. The learning times for this sample are summarized in the following contingency table. The observed values are bold, and its respective expected frequency is the value given in parenthesis. Learning times 41-60 h 21-40 h 33 (36) 57 (54) keyboard 61-80 h Row total 30 (20) 20 (30) A P 80 B 120 Column total 90 60 50 (i) Find the observed value and expected frequency in the cell labelled P and Q. (ii) Conduct the chi-square test at a = 0.005 .

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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A sample of 200 beginning typing students is selected and randomly assigned to learn typing on one of two keyboards. The management would like to know that the keyboard arrangement and the learning times are independent. The learning times for this sample are summarized in the following contingency table. The observed values are bold, and its respective expected frequency is the value given in parenthesis. Learning times 21-40 h 33 (36) 57 (54) keyboard 41-60 h 61-80 h Row total 30 (20) 20 (30) A P 80 B 120 Column total 90 60 50 (i) Find the observed value and expected frequency in the cell labelled P and Q. (ii) Conduct the chi-square test at a = 0.005.
Transcribed Image Text:A sample of 200 beginning typing students is selected and randomly assigned to learn typing on one of two keyboards. The management would like to know that the keyboard arrangement and the learning times are independent. The learning times for this sample are summarized in the following contingency table. The observed values are bold, and its respective expected frequency is the value given in parenthesis. Learning times 21-40 h 33 (36) 57 (54) keyboard 41-60 h 61-80 h Row total 30 (20) 20 (30) A P 80 B 120 Column total 90 60 50 (i) Find the observed value and expected frequency in the cell labelled P and Q. (ii) Conduct the chi-square test at a = 0.005.
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