Hello,

please answer the following questions, it is an exam and really need good answers.

no need to explanation, only anwers

Question 1

2 pts

____________ is NOT a measure of central tendency, and ____________ is NOT a measure of variation.

Median ———— Standard Deviation

Mode ———— Variance

Range ———— Median

Mean ———— Standard Deviation

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Question 2

2 pts

The ____________ of a set of values is their ____________ divided by the total number of values.

Range ———— Product

Median ———— Difference

Variance ———— Quotient

Arithmetic Mean ———— Sum

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Question 3

2 pts

The ____________ of a data set is the value with the ____________ frequency.

Arithmetic Mean ———— Average

Range ———— Increasing

Median ———— Lowest

Mode ———— Highest

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Question 4

2 pts

Calculate the median of the following numbers:

15, 37, 50, 10, 24, 12, 32, 20

25

40

22

20

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Question 5

2 pts

Calculate the arithmetic mean of the following numbers:

15, 37, 50, 10, 24, 12, 32, 20

20

22

40

25

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Question 6

2 pts

Find the average age from the following frequency distribution.

Age	Frequency
15 – 19	3
20 – 24	5
25 – 29	2
30 – 34	4

14

30

24.5

3.5

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Question 7

2 pts

Calculate the average score from the following frequency distribution.

Score	Frequency
1	7
5	3
4	5
7	6

4

5.3

3.8

6

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Question 8

2 pts

In a Normal Distribution:

Mean = Mode ≠ Median

Mean = Median = Mode

Mean = Median ≠ Mode

Median = Mode ≠ Mean

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Question 9

2 pts

If the Variance of a data set is 4, then its Standard Deviation is:

2

16

0

8

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Question 10

2 pts

The following data distribution is ____________.

Symmetric

Skewed to the left

Skewed to the right

Bimodal

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Question 11

2 pts

The ____________ is equal to the ____________ of the ____________.

Standard Deviation ———— Square ———— Variance

Variance ———— Square Root ———— Standard Deviation

Variance ———— Square ———— Range

Standard Deviation ———— Square Root ———— Variance

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Question 12

2 pts

In the graph of a data distribution, the peak(s) (if any) of the graph correspond(s) to the ____________.

Mode

Range

Variance

Standard Deviation

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Question 13

2 pts

Calculate the coefficient of variation (CV) of a data set whose Mean is 50 and whose Standard Deviation is 5.

5 %

55 %

20 %

10 %

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Question 14

2 pts

A Normal Distribution has a Mean of 100 and a Standard Deviation of 10.

What percent of data values lie between 80 and 120 ?

68 %

95 %

99.7 %

34 %

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Question 15

2 pts

A Normal Distribution has a Mean of 100 and a Standard Deviation of 10.

What percent of data values are less than 90 ?

16 %

32 %

34 %

95 %

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Question 16

2 pts

In a Normal Distribution, ____________ of the data values lie within ____________ Standard Deviations of the Mean.

68 % ———— 2

95 % ———— 1

50 % ———— 3

99.7 % ———— 3

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Question 17

2 pts

A data distribution has a mean of 20 and a standard deviation of 3.

Calculate the z-score of 17.

– 1

1

2.5

– 3

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Question 18

2 pts

In any data distribution, the z-score of the ____________ is always ____________.

Variance ———— Negative

Range ———— Positive

Mean ———— 0

Median ———— 50 %

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Question 19

2 pts

The 50th ____________ of any data set is equal to the ____________.

Percentile ———— Median

Quartile ———— First Quartile

Percentile ———— Minimum Value

Quartile ———— Maximum Value

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Question 20

2 pts

____________ are data values that are ____________ the other data values.

Outliers ———— Far from

Trend Lines ———— Correlated to

Frequency Distributions ———— Grouped with

Histograms ———— Opposed to

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Question 21

2 pts

____________ frequency distributions display the values of the variable ____________.

Weighted ———— In decreasing order

Ungrouped ———— Individually

Standard ———— In increasing order

Grouped ———— Randomly

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Question 22

2 pts

This formula is used to calculate the ____________ in ____________.

Variance ———— An ungrouped frequency distribution

Mean ———— A grouped frequency distribution

Range ———— A sample

Standard Deviation ———— A histogram

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Question 23

2 pts

Calculate the final grade of a student whose grades and weights are given in this table.

85.7

88.5

83.4

87.5

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Question 24

2 pts

The ____________ is less sensitive to outliers than the ____________.

Discrete data ———— Continuous data

Median ———— Mean

Mean ———— Median

Frequency Distribution ———— Histogram

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Question 25

2 pts

In order to calculate the ____________, the first step is to ____________.

Variance ———— Find the equation of the trend line

Median ———— Arrange the values in numerical order

Mean ———— Construct a histogram

Standard Deviation ———— Take the square root of the frequency

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Question 26

2 pts

The concept of ____________ applies to ____________.

Mean ———— Categorical data only

Standard Deviation ———— Neither categorical nor numerical data

Mode ———— Categorical and numerical data

Frequency ———— Numerical data only

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Question 27

2 pts

If all the entries in a data set are ____________, then the ____________ is equal to ____________.

Categorical ———— Mean ———— 100 %

Random ———— Mode ———— A percentage

Decimals ———— Frequency ———— The trend line

Equal ———— Range ———— Zero

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Question 28

2 pts

Calculate the range of the following data set:

7, 19, 31, 12, 57, 45, 23, 9, 51, 29, 36

29

31

50

11

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Question 29

2 pts

Calculate the sample variance of the following data set:

2, 7, 5, 10, 18, 12

5.7

32.0

9.0

16.0

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Question 30

2 pts

The ____________ of a data set is always a ____________ number.

Mean ———— Whole

Coefficient of Variation ———— Unitless

Trend Line ———— Random

Variance ———— Negative

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Question 31

2 pts

Calculate the population standard deviation (rounded to nearest tenth) of the following data set:

17, 1, 4, 12, 8

11.5

5.7

16.0

32.2

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Question 32

2 pts

In a ____________ distribution, ____________ data values are ____________.

Random ———— Grouped ———— Increasing

Normal ———— All of the ———— Qualitative

Normal ———— 50 % of the ———— Less than the Mean

Frequency ———— Categorical ———— Continuous

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Question 33

2 pts

The ____________ under the ____________ of a Normal Distribution is always ____________.

Trend Line ———— Mean ———— Positive

Area ———— Graph ———— 100 %

Variance ———— Median ———— Symmetric

Outlier ———— Chart ———— Random

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Question 34

2 pts

The Empirical Rule applies to ____________ distributions, whereas Chebyshev's Rule applies to ____________ distributions.

Normal ———— All

Random ———— Average

Chart ———— Graphical

Frequency ———— Linear

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Question 35

2 pts

The ____________ of a data value indicates how many ____________ away from the ____________ that value is.

Average ———— Ranges ———— Variance

Outlier ———— Samples ———— Population

Z-score ———— Standard Deviations ———— Mean

Frequency ———— Points ———— Trend Line

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Question 36

2 pts

Values greater than the Mean have a ____________ z-score. Values less than the Mean have a ____________ z-score.

Discrete ———— Continuous

Constant ———— Variable

Negative ———— Positive

Positive ———— Negative

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Question 37

2 pts

In a Normal Distribution, mean = 200 and standard deviation = 10.

Then, about ____________ of data values fall between ____________ and ____________.

99.7 % ———— 180 ———— 220

50 % ———— 100 ———— 150

68 % ———— 190 ———— 210

95 % ———— 190 ———— 230

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Question 38

2 pts

This formula represents the least fraction of data values that lie ____________ in ____________.

To the left of the mean ———— A normal distribution

To the right of the mean ———— Any data distribution

More than k standard deviations from the mean ———— A normal distribution

Within k standard deviations from the mean ———— Any data distribution

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Question 39

2 pts

A normal distribution has a mean of 25 and a standard deviation of 3.

Then, about ____________ of data values fall between ____________ and ____________.

68 % ———— 22 ———— 25

99.7 % ———— 16 ———— 34

95 % ———— 25 ———— 31

95 % ———— 16 ———— 31

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Question 40

2 pts

The ____________ is the distance from the ____________ to the ____________.

Variance ———— Mode ———— Standard Deviation

Range ———— Median ———— Upper Quartile

Range ———— Mean ———— Median

Interquartile Range ———— Lower Quartile ———— Upper Quartile

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Question 41

2 pts

If a data value x lies between the lower and upper fences, then x is ____________.

An extreme outlier

A mild outlier

A boxplot

Not an outlier

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Question 42

2 pts

Select the number that is NOT part of the Five Number Summary.

Median

Lower Quartile

Standard Deviation

Maximum value

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Question 43

2 pts

A ____________ is a graphical display of the ____________.

Scatter Plot ———— Variance

Z-score ———— Empirical Rule

Normal Distribution ———— Outliers

Boxplot ———— Five Number Summary

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Question 44

2 pts

____________ divide a data set into four equal parts, whereas ____________ divide it into one hundred equal parts.

Fences ———— Z-scores

Percentiles ———— Quartiles

Quartiles ———— Percentiles

Measures of variation ———— Measures of central tendency

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Question 45

2 pts

The normal distribution with the largest standard deviation is the ________ one.

The normal distribution with the smallest standard deviation is the ____________ one.

Blue ———— Green

Red ———— Green

Blue ———— Yellow

Yellow ———— Blue

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Question 46

2 pts

In a data set, Q1 = 700, Q2 = 720 and Q3 = 800.

Then the value 430 is ____________.

A mild outlier

A fence

An extreme outlier

Not an outlier

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Question 47

2 pts

In a data set, Q1 = 700, Q2 = 720 and Q3 = 800. Then the value 935 is ____________.

Not an outlier

A fence

A mild outlier

An extreme outlier

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Question 48

2 pts

In a data set, Q1 = 700, Q2 = 720 and Q3 = 800.

Then the value 120 is ____________.

An extreme outlier

A fence

A mild outlier

Not an outlier

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Question 49

2 pts

In a data set, Q1 = 700, Q2 = 720 and Q3 = 800.

Then the Extreme Lower Fence is equal to ____________.

400

1,100

550

950

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Question 50

2 pts

In a data set, the formula Q3 – Q1 defines the ____________.

Interquartile Range

Variance

Range

Class Midpoint