n 7 of 23 following information to answer Question 7 and Question 8. The marks of six students in a Mathematics test are represented by the variable x. The following data was produced: n=6, Ex = 279 and Ex? = 13 093. Find the mean and standard deviation of the following data. A. mean =46.5, standard deviation = 5.82 B. mean = 52.5, standard deviation = 4.89 C. mean =46.5, standard deviation = 4.89 D. mean =52.5, standard deviation = 5.82 Question 8 It was later discovered that one of the values was incorrectly recorded as 43. The correct value,
n 7 of 23 following information to answer Question 7 and Question 8. The marks of six students in a Mathematics test are represented by the variable x. The following data was produced: n=6, Ex = 279 and Ex? = 13 093. Find the mean and standard deviation of the following data. A. mean =46.5, standard deviation = 5.82 B. mean = 52.5, standard deviation = 4.89 C. mean =46.5, standard deviation = 4.89 D. mean =52.5, standard deviation = 5.82 Question 8 It was later discovered that one of the values was incorrectly recorded as 43. The correct value,
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:n 7
5 of 23
following information to answer Question 7 and Question 8.
The marks of six students in a Mathematics test are represented by the variable x. The following data was
produced: n=6, Ex = 279 and Ex? = 13 093.
Find the mean and standard deviation of the following data.
A. mean =46.5,
standard deviation = 5.82
B. mean = 52.5.
standard deviation = 4.89
C. mean =46,5
standard deviation = 4.89
D. mean =52.5,
standard deviation = 5.82
Question 8
It was later discovered that one of the values was incorrectly recorded as 43. The correct value,
in fact, is 34. Find the new values of the mean and standard deviation.
A. mean = 45,
standard deviation = 7.07
B. mean = 51,
standard deviation = 6.84
C. mean = 45.
standard deviation = 6.84
D. mean = 51,
standard deviation = 7,07
Question 9
The numbers of people living in each of the homes on a certain street were recorded.
Number of people
1
2
4
5
7
Number of homes
3
7
2
For example, 5 homes have 4 people living in each of them. Find the mean number of people per home.
A. 3.68
В. 5
C. 4
D. 4.12
2.
Transcribed Image Text:Question 5
Use the information below to answer Question 5 and Question 6.
The table below shows the sales (in packets) of a commodity at a supermarket over a three-year period,
together with appropriate totals and values of a four - point moving average.
Centred
moving
average
values
Sales
Four-quarter
totals
Year
Quarter
Centred totals
(number of packets)
2005
57
II
64
248
II
68
494
61.75
IV
59
491
61.375
245
2006
55
490
61.25
245
II
63
487
60.875
242
68
60.375
241
IV
56
481
60.125
240
2007
54
479
59.875
239
62
475
y
236
II
67
IV
53
Find the value of w.
A. 127
B. 246.5
C. 242
D. 246
Question 6
Find the values of x and y?
A. x = 483,
y = 118.75
B. x = 483.
y = 59.375
C. x = 241.5, y = 118.75
D. x = 241.5, y =59.375
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