Quiz 1_MATH302 Page 1 of 8
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Question 1 of 20 1.04' 1.0 Pornts
Find the z-score for each student and indicate which one has a better relative position. An Art Major earned a
grade of 46 on an exam with f = 50 and s = 5; A Theat
StatisticsMATH302 Midterm Examination
INSTRUCTIONS: This is an open-book and open note examination. You may use your textbook, notes, your computer and a calculator during the examination. However, you are not to consultin any manner-with anyone while you
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Question 1 of 25
Which measure of central location is meaningful when the data are categorical?
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A.The mode
B.The median
C.The mean
D.The range
Answer Key: A
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Questi
Quiz 1_MATH302
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Quiz 1_MATH302
Part 1 of 3 -
Question 1 of 20
The difference between the first and third quartile is called the
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A.unimodal range
B.mid range
C.interquartile range
D.interdep
Part 1 of 3 -
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Question 1 of 20
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Find the z-score for each student and indicate which one has a better relative position. An Art
Major earned a grade of 46 on an exam with
grade of 70 on an exam with
= 50 and s = 5; A Theate
Part 1 of 9 -
Question 1 of 25
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Suppose that a histogram of a data set is approximately symmetric and "bell shaped". Approximately
what percent of the observations are within two standard deviations of the mean?
A.50%
B.99.7
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Question 1 of 20
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces
(e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For sc
Quiz 4 MATH302
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Comment: Eric,
Very good job. You did pretty well. Spend a little more time working on this material, and next time, you
will make an A. Therefore, keep at it, and you will do well.
Sincerely,
Vince
Part 1 of 3 -
Q
Part 1 of 8 -
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Question 1 of 17
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Two teams of workers assemble automobile engines at a manufacturing plant in Michigan. A
random sample of 145 assemblies from team 1 shows 15 unacceptable assemblies. A similar
random sample o
Part 1 of 9 -
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Question 1 of 25
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A histogram that is positively skewed is also called
A.skewed to the right
B.balanced
C.skewed to the left
D.symmetric
Answer Key: A
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Question 2 of 25
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Question 1 of 20
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If 25 tickets are sold and 2 prizes are to be awarded, find the probability that one person will win
both prizes if that person buys exactly 2 tickets.
A.1/600
B.1/2300
C.1/300
D.1/700
Answer
Quiz 5 MATH302
Table of Contents
Part 1 of 8 Question 1 of 17
1.0 Points
Two independent samples of sizes n1 = 50 and n2 = 50 are randomly selected from two
populations to test the difference between the population means,
. The sampling
distribution of th
State of the Economy
Boom
Moderate Growth
Week Growth
No Growth
Probability
0.15
0.35
0.25
0.25
Probability x Return
Stocks
Gold
Boom
0.0375
-0.045
Probability x Return
Stocks
Gold
Boom
0.009375
0.0135
Market Return
25%
20%
5%
-14%
Gold Return
-30%
-9%
35
Part 1 of 3 Question 1 of 20
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For a boxplot, the box itself represents what percent of the observations?
A.upper 75%
B.lower 25%
C.middle 50%
D.100%
Answer Key: C
Question 2 of 20
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Numerical variables can be
Part 1 of 16 -
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Question 1 of 23
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The chi-square goodness-of-fit test can be used to test for:
A.difference between population means
B.significance of sample statistics
C.difference between population variances
D.normality
An
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Question 1 of 17
A researcher hypothesizes that the variation in the amount of money spent on business dinners is
greater than the variation of the amount of money spent on lunches. The variance of nine
business dinners was $6.12 and the v
Part 1 of 3 -
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Question 1 of 20
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Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-),
spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For
sc
Given our problem: With a class of 45 students of which 15 are boys and 30 are girls: If 10 were selected
at random, what is the probability that exactly 3 boys will be selected?
First we need to find the number of combinations possible, for this I used E
Step 1:
In which null hypothesis should, H0:>0.5
And the alternative hypothesis would be, Ha:0.5
Step 2:
Critical value: z statistics in 95% confidence limit=1.645
Step 3:
Test statistic. The test statistic is a z-score (z) defined by the subsequent equat
Given data is,
0.46 , 0.61 , 0.52 , 0.48 , 0.57 , 0.54
1. STATING THE RESEARCH QUESTION.
Is the mean weight of diamond = 0.5 karat
The population of interest is all diamond that processed.
The parameter of interest is the mean and the variable diamond wei
Question 1 of 20
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A manufacturer of flashlight batteries took a sample of 13 batteries from a days production and
used them continuously until they failed to work. The life lengths of the batteries, in hours, until
they failed were: 342, 42
Page
4-50
252
!=
35!10!=
45!/35!10!=
Combination Rule nCr=n!/(n-r)!r!
45C10=45!/(45-10)!10!
Total Combinations of 10 students out of 45
45
35
119622220865480000000000000000000000000000000000000000000.00
10333147966386100000000000000000000000000.00
3749692