Question 1 of 40
2.5/ 2.5 Points
In the past, the mean running time for a certain type of flashlight battery has been 9.8 hours. The
manufacturer has introduced a change in the production method and wants to perform a
hypothesis test to determine whether
Question 1 of 40
2.5/ 2.5 Points
A bag contains 4 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly
selected from the bag, what is the probability that it is blue?
A. 2/11
B. 3/11
C. 5/14
D. 3/14
Question 2 of 40
2.5/ 2.5 Points
Su
Question 1 of 20
5.0/ 5.0 Points
The annual precipitation amounts in a certain mountain range are normally distributed with a
mean of 88 inches, and a standard deviation of 10 inches. What is the likelihood that the mean
annual precipitation during 25 ran
Question 1 of 20
5.0/ 5.0 Points
The federal government requires a car manufacturer to have a minimum miles per gallon (mpg)
average over the cars it makes. Suppose that the models and mpgs for a manufacturer are
Corsair (31 mpg), Futura (30 mpg), Retro (
Question 1 of 20
Which line chart below represents the data in the table?
A.
B.
0.0/ 5.0 Points
C.
D. None of the above
Question 2 of 20
Alan tossed a die 50 times and obtained the results shown in the dot plot below.
5.0/ 5.0 Points
How many times did he
Part 1 of 1 Question 1 of 20
95.0/ 100.0 Points
5.0/ 5.0 Points
Data has been collected from a representative sample of a well-defined population to answer the
question: How much money does the average senior male at Normal Community High School
have in h
Online Exam 6_06
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Question 1 of 40
42.5/ 50.0 Points
2.5/ 2.5 Points
A class consists of 50 women and 82 men. If a student is randomly
selected, what is the probability that the student is a woman?
A. 32/132
B. 27/66
Online Exam 3_03
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Question 1 of 20
90.0/ 100.0 Points
5.0/ 5.0 Points
Al and Joe are two county sheriffs deputies assigned to watch for traffic violations. Their
arrest and conviction records for May and June are sho
Online Exam 2_02
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Question 1 of 20
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5.0/ 5.0 Points
The stacked bar chart below shows the percentages of death due to cancer in four geographic
regions of the U.S. that occurred in three ethnic gro
Online Exam 4_04
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Question 1 of 20
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A math teacher gives two different tests to measure students aptitude for math. Scores on the
first test are normally distributed with a mean of 24 and a standard de
Part 1 of 1 -
Question 1 of 20
5.0/ 5.0 Points
The stacked bar chart below shows the percentages of death due to cancer in four
geographic regions of the U.S. that occurred in three ethnic groups in 2003.
In which geographic area did Hispanics account for
Quiz Chapter 8
1)
Lookup on Table 5 using .05 one tail d.f. (11-1) 10 = 1.812
t0 = 1.812
STAT CRUNCH > Stat > T Statistics > One sample > with summary
> Next
t=1.1706
t < t0
t is not in the rejection region (t0) so fail to reject H0
2)
> Calculate
Critica
Online Exam 4_04
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Question 1 of 20
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Decide which of the described variables is/are likely to have a normal
or near-normal distribution.
a) The heights of corn stalks in one row of corn that is half a mile long
b) The numbe