Part 1 Fill in the missing values in the contingency table. Round your expected frequencies to two or more decimal values to three or more decimal places. places, and round your Send data to Excel Laboratory performance Involved in Involved in Involved in exactly one Total no incident 2+ incidents incident 43 15 61 Took the techniques 15.79 LL course Status 0.040 regarding lab Didn't take 40 techniques the 25.22 123 course techniques course 0.024 Total 41 00 0 000 Part 2 Answer the following to summarize the test of the hypothesis that there is no relationship between student laboratory performances and whether or not they took the techniques course. For your test, use the 0.10 level of significance. (a) Determine the type of test statistic to use. Type of test statistic: (Choose one) ▼ (b) Find the value of the test statistic. (Round to two or more decimal places.) [O (c) Find the p-value. (Round to three or more decimal places.) (d) Can Mandrake conclude that there is a relationship between students' laboratory performances and whether or not they took the techniques course? Use the 0.10 level of significance. O Yes O No Mandrake Falls High School is losing a lot of money through its school laboratories. Accidents and misuse of equipment by students are taking their toll on laboratory supplies. In an attempt to remedy this, Mandrake is experimenting with a weekend course in laboratory techniques. For the time being, lack of resources allow only a portion of Mandrake's lab students to take the weekend course: of the 200 students enrolled in lab classes at Mandrake, only 77 have been able to take the weekend course. Mandrake is interested in evaluating the course's effectiveness in propagating safety in the laboratories. During regular lab classes, lab instructors are recording harmful lab incidents: accidents, misuse of lab equipment, etc. The high school is looking at the data and examining two variables: laboratory performance ("involved in no incident", "involved in exactly one incident", or "involved in 2+ incidents") and status regarding lab techniques course ("took the techniques course" or "didn't take the techniques course"). The contingency table below gives a summary of the data that have been gathered so far. In each of the 6 cells of the table are three numbers: the first number is the observed cell frequency (fo); the second number is the expected cell frequency (fr) under the assumption that there is no relationship between students' laboratory performances and whether or not they took the techniques course; and the third number is the following value. (Observed cell frequency - Expected cell frequency fE Expected cell frequency The numbers labeled "Total" are totals for observed frequency. 2.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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Part 1
Fill in the missing values in the contingency table. Round your expected frequencies to two or more decimal
values to three or more decimal places.
places, and round your
Send data to Excel
Laboratory performance
Involved in
Involved in
Involved in
exactly one
Total
no incident
2+ incidents
incident
43
15
61
Took the
techniques
15.79
LL
course
Status
0.040
regarding
lab
Didn't take
40
techniques
the
25.22
123
course
techniques
course
0.024
Total
41
00 0
000
Part 2
Answer the following to summarize the test of the hypothesis that there is no relationship between student
laboratory performances and whether or not they took the techniques course. For your test, use the 0.10
level of significance.
(a) Determine the type of test statistic to
use.
Type of test statistic: (Choose one) ▼
(b) Find the value of the test statistic. (Round to two or more decimal places.)
[O
(c) Find the p-value. (Round to three or more decimal places.)
(d) Can Mandrake conclude that there is a relationship between students'
laboratory performances and whether or not they took the techniques
course? Use the 0.10 level of significance.
O Yes O No
Transcribed Image Text:Part 1 Fill in the missing values in the contingency table. Round your expected frequencies to two or more decimal values to three or more decimal places. places, and round your Send data to Excel Laboratory performance Involved in Involved in Involved in exactly one Total no incident 2+ incidents incident 43 15 61 Took the techniques 15.79 LL course Status 0.040 regarding lab Didn't take 40 techniques the 25.22 123 course techniques course 0.024 Total 41 00 0 000 Part 2 Answer the following to summarize the test of the hypothesis that there is no relationship between student laboratory performances and whether or not they took the techniques course. For your test, use the 0.10 level of significance. (a) Determine the type of test statistic to use. Type of test statistic: (Choose one) ▼ (b) Find the value of the test statistic. (Round to two or more decimal places.) [O (c) Find the p-value. (Round to three or more decimal places.) (d) Can Mandrake conclude that there is a relationship between students' laboratory performances and whether or not they took the techniques course? Use the 0.10 level of significance. O Yes O No
Mandrake Falls High School is losing a lot of money through its school laboratories. Accidents and misuse of
equipment by students are taking their toll on laboratory supplies. In an attempt to remedy this, Mandrake
is experimenting with a weekend course in laboratory techniques. For the time being, lack of resources allow
only a portion of Mandrake's lab students to take the weekend course: of the 200 students enrolled in lab
classes at Mandrake, only 77 have been able to take the weekend course. Mandrake is interested in
evaluating the course's effectiveness in propagating safety in the laboratories. During regular lab classes, lab
instructors are recording harmful lab incidents: accidents, misuse of lab equipment, etc.
The high school is looking at the data and examining two variables: laboratory performance ("involved in no
incident", "involved in exactly one incident", or "involved in 2+ incidents") and status regarding lab
techniques course ("took the techniques course" or "didn't take the techniques course").
The contingency table below gives a summary of the data that have been gathered so far. In each of the 6
cells of the table are three numbers: the first number is the observed cell frequency (fo); the second
number is the expected cell frequency (fr) under the assumption that there is no relationship between
students' laboratory performances and whether or not they took the techniques course; and the third
number is the following value.
(Observed cell frequency - Expected cell frequency
fE
Expected cell frequency
The numbers labeled "Total" are totals for observed frequency.
2.
Transcribed Image Text:Mandrake Falls High School is losing a lot of money through its school laboratories. Accidents and misuse of equipment by students are taking their toll on laboratory supplies. In an attempt to remedy this, Mandrake is experimenting with a weekend course in laboratory techniques. For the time being, lack of resources allow only a portion of Mandrake's lab students to take the weekend course: of the 200 students enrolled in lab classes at Mandrake, only 77 have been able to take the weekend course. Mandrake is interested in evaluating the course's effectiveness in propagating safety in the laboratories. During regular lab classes, lab instructors are recording harmful lab incidents: accidents, misuse of lab equipment, etc. The high school is looking at the data and examining two variables: laboratory performance ("involved in no incident", "involved in exactly one incident", or "involved in 2+ incidents") and status regarding lab techniques course ("took the techniques course" or "didn't take the techniques course"). The contingency table below gives a summary of the data that have been gathered so far. In each of the 6 cells of the table are three numbers: the first number is the observed cell frequency (fo); the second number is the expected cell frequency (fr) under the assumption that there is no relationship between students' laboratory performances and whether or not they took the techniques course; and the third number is the following value. (Observed cell frequency - Expected cell frequency fE Expected cell frequency The numbers labeled "Total" are totals for observed frequency. 2.
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