MATH 1280 – Review/ 50 Qs & Correct Ans/
2024-2025.
In a left-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode - Answer: The mode
In a right-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode - Answer: The mean
What kind of data is the amount of money spend in a grocery store?
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,a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete - Answer: Quantitative-discrete
The cost of unleaded gasoline in the Bay Area once followed an unknown distribution with a
mean of $4.59 and a standard deviation of $0.10. Sixteen gas stations from the Bay Area are
randomly chosen. We are interested in the average cost of gasoline for the 16 gas stations. Find
the probability that the average price for 30 gas stations is less than $4.55.
a. 0.6554
b. 0.3446
c. 0.0142
d. 0.9858
e. 0 - Answer: 0.0142
Which measure of the center of data would a clothing store use when placing orders for the
typical middle customer?
a. Mean
b. Median
c. Mode
d. IQR - Answer: Median
Find the mean, μ, for the binomial distribution which has the stated values of n and p. n = 676; p
= 0.7.
a. μ = 474.9
b. μ = 473.2
c. μ = 474.5
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, d. μ = 471.7 - Answer: μ = 473.2
The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a
mean of five minutes and a standard deviation of two minutes. Find the probability that it takes
at least eight minutes to find a parking space.
a. 0.0001
b. 0.9270
c. 0.1862
d. 0.0668 - Answer: 0.0668
The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a
mean of five minutes and a standard deviation of two minutes. If the mean is significantly
greater than the standard deviation, which of the following statements is true? I. The data
cannot follow the uniform distribution. II. The data cannot follow the exponential distribution.
III. The data cannot follow the normal distribution.
a. I only
b. II only
c. III only
d. I, II, and III - Answer: II only
A study finds that the mean amount spent in a grocery store per visit by customers in a sample
is $12.84. This is an example of a:
a. Population
b. Sample
c. Parameter
d. Statistic
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2024-2025.
In a left-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode - Answer: The mode
In a right-skewed distribution, which is greater?
a. The mean
b. The median
c. The mode - Answer: The mean
What kind of data is the amount of money spend in a grocery store?
Page 1 of 17
,a. Qualitative
b. Quantitative-continuous
c. Quantitative-discrete - Answer: Quantitative-discrete
The cost of unleaded gasoline in the Bay Area once followed an unknown distribution with a
mean of $4.59 and a standard deviation of $0.10. Sixteen gas stations from the Bay Area are
randomly chosen. We are interested in the average cost of gasoline for the 16 gas stations. Find
the probability that the average price for 30 gas stations is less than $4.55.
a. 0.6554
b. 0.3446
c. 0.0142
d. 0.9858
e. 0 - Answer: 0.0142
Which measure of the center of data would a clothing store use when placing orders for the
typical middle customer?
a. Mean
b. Median
c. Mode
d. IQR - Answer: Median
Find the mean, μ, for the binomial distribution which has the stated values of n and p. n = 676; p
= 0.7.
a. μ = 474.9
b. μ = 473.2
c. μ = 474.5
Page 2 of 17
, d. μ = 471.7 - Answer: μ = 473.2
The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a
mean of five minutes and a standard deviation of two minutes. Find the probability that it takes
at least eight minutes to find a parking space.
a. 0.0001
b. 0.9270
c. 0.1862
d. 0.0668 - Answer: 0.0668
The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a
mean of five minutes and a standard deviation of two minutes. If the mean is significantly
greater than the standard deviation, which of the following statements is true? I. The data
cannot follow the uniform distribution. II. The data cannot follow the exponential distribution.
III. The data cannot follow the normal distribution.
a. I only
b. II only
c. III only
d. I, II, and III - Answer: II only
A study finds that the mean amount spent in a grocery store per visit by customers in a sample
is $12.84. This is an example of a:
a. Population
b. Sample
c. Parameter
d. Statistic
Page 3 of 17
