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Question: Given a small dataset: 2.3, 7.


Given a small dataset: 2.3, 7.1, 6.3, 5.8, 4.2, what is the range for this data?
a) 1.9
b) 2.5
c) 4.8
d) 2.3
10. A useful tool for grouping data is __________.
a) A frequency distribution
b) Group dynamics
c) Segmentation
d) Constructive statistics
11. A frequency distribution of a particular data can be presented as a table with two columns: one is the “Class Interval” and the other is the __________.
a) Class width
b) Class range
c) Class frequency
d) Class mid-point
12. In a frequency distribution, which of the following is sometimes referred to as the class mark?
a) Relative frequency
b) Cumulative frequency
c) Class midpoint
d) Median class frequency
e) Modal class frequency
13. For the following frequency distribution, what is the relative frequency for the class “30-under 40”?
Class interval Frequency
10-under 20 ………………. 20
20-under 30 ………………. 16
30-under 40 ………………. 30
40-under 50 ………………. 18

a) 0.24
b) 0.36
c) 0.46
d) 0.21
e) 0.22
14. The range of a given dataset is 12.5, if 7 classes are used to construct a frequency distribution, what is width of each class is approximately?
a) 1.58
b) 1.79
c) 1.56
d) 1.75
15. A frequency table about degrees of 40 CEOs was given:
Degree ___________ Frequency
Bachelors ……………………. 8
Laws ………………………….. 4
Masters ……………………… 4
MBA ….…………………….. 20
None ….………………………. 2
PhD ….………………………… 2
Total ….…………………..… 40

What is the relative frequency of CEOs with PhD degrees?
a) 5%
b) 10%
c) 50%
d) 100%
16. Two techniques for grouping data are __________ and __________.
a) Scatter plot and Pareto chart
b) Frequency distribution and stem-and-leaf plot
c) Class intervals and class frequencies
d) Histogram and pie chart
17. The stem in a stem-and-leaf plot of numbers with five digits, the stem has three digits. For the number, 45637, the leaf is ___________.
a) 456
b) 37
c) 637
d) 63
e) 74


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> The heights of four fifth grade students are 58, 56, 60 and 62 inches. What are the mean, median and standard deviation of this dataset, and the standard deviation of the new dataset by adding 2 to each number, i.e., 60, 58, 62, 64? a) 59, 58, 2.58 and 4

> Which of the following descriptive measure is not a statistic? a) Sample mean b) Population mean µ c) Sample standard deviation s d) Sample variance s2 e) Sample median 5. To study the impact of advertising on various market segments, marke

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> In a one-way ANOVA the total variance is portioned into the variance due to treatments and the variance due to error. 2. A repeated measures design is a special case of the randomized block design.

> To test if the means of two populations are different, we test the significance of the difference between two sample means. 2. The distribution of the difference between two sample means may be considered to be normally distributed only if the two popula

> What is the relative frequency of type B in the previous question? a) 0.25 b) 0.35 c) 0.5 d) 0.64 29. In sciences and technology, use of pie charts is limited compared to other types of graphs such as a histogram, because __________. a) It is difficult

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> Which of the following is a characteristic of a hypergeometric distribution? a) It is a continuous distribution. b) It has undefined trials c) The outcome of each trial is a success or a failure or undefined. d) Sampling is done without replacement. e)

> In the distribution of a random variable x which is binomial with number of trials n = 30 and the probability of success p = 0.99, the largest value of x that can occur is __________. a) 24 b) 30 c) 15 d) Infinity 14. One fair coin is tossed 10 times, w

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