Statistics Foundation | STF | Self Study

Statistics Basics

What is Statistics

How to Chose a Sample

Data Visualization

STF-L1-Quiz-StatisticsBasics

Levels of Measurements

Measure of Central Tendency

Measure of Dispersion (Multi Variable)

Measure of Dispersion (Uni Variable)

STF-L2-Quiz-Measures

Central Limit Theorem

Normal Distribution

Binomial Distribution

Uniform Distribution

Poison Distribution

Gamma & Chi Square Distribution

STF-L3-Quiz-Distributions

Hypothesis & Estimation

Z Test, Z Score & p Value

Estimators & Confidence Levels

About Hypothesis Testing

Type 1 & 2 Errors

STF-L4-Quiz-Hypothesis

Parametric Tests

STF-L5-Quiz-ParametricTests

Non Parametric Tests

Stats Chi Square Test

1 Sample Sign Test

Kruskal Wallis Test

Mann Whitney Test

Spearman Rank Correlation

STF-L6-Quiz-NonParametric

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STF-L2-Quiz-Measures

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Integral Bytes Question 1 of 21

1. Question

Find the mean of the following numbers: 19, 21, 18, 17, 18, 22, 46

23

18

17

19

Correct

Incorrect
Integral Bytes Question 2 of 21

2. Question

Find the median of the following numbers: 19, 21, 18, 17, 18, 22, 46

23

18

17

19

Correct

Incorrect
Integral Bytes Question 3 of 21

3. Question

Find the mode of the following numbers: 19, 21, 18, 17, 18, 22, 46

23

18

17

19

Correct

Incorrect
Integral Bytes Question 4 of 21

4. Question

The difference between s and σ is that

s is for a sample and σ is for a population

s is for a population and σ is for a sample

s is a parameter and σ is not

Correct

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Integral Bytes Question 5 of 21

5. Question

A mean is known as a statistic if it is computed from the

parameter

population

sample

Correct

Incorrect
Integral Bytes Question 6 of 21

6. Question

The heights of some students are given.
158cm 172cm 164cm
164cm 167cm 159cm
What is the RANGE of the heights?

13 cm

330 cm

164 cm

14 cm

Correct

Incorrect
Integral Bytes Question 7 of 21

7. Question

When you are trying to find the MEDIAN of a set of data and 2 numbers are left in the middle after putting them in order from least to greatest, what do you do?

List both of the numbers as the Median.

Add the two numbers together and divide by 2.

Pick the one that you want.

Subtract the two numbers.

Correct

Incorrect
Integral Bytes Question 8 of 21

8. Question

What is the range?

The sum of the largest and smallest number

The number in the middle

The difference between the largest and smallest number

The number that appears most often

Correct

Incorrect
Integral Bytes Question 9 of 21

9. Question

What is the median?

The number in the middle when the numbers are in order from least to greatest.

The difference between the largest and smallest number.

The average

The number that appears most often.

Correct

Incorrect
Integral Bytes Question 10 of 21

10. Question

What is the mode?

The average

The number that appears most often.

The largest number – the smallest number

The number in the middle.

Correct

Incorrect
Integral Bytes Question 11 of 21

11. Question

The heights (cm) of 6 children were measured as 141, 155, 130, 146, 141, 134.

What is the standard deviation of the data? Use 141.1667 as the value for the mean to keep the precision. Use Excel or a calculator.

8.84

8.07

17.68

7.22

Correct

Incorrect

Integral Bytes Question 12 of 21

12. Question

The table below shows the first 10 cases of a data set.

Variables
ID	V1	V2	V3
1	Red	25	1.62
2	Blue	35	1.58
3	Yellow	44	1.35
4	Green	28	1.54
5	Black	35	1.35
6	Brown	42	1.21
7	Blue	36	1.76
8	Pink	38	1.57
9	Green	30	1.47
10	Purple	40	1.18
:	:	:	:

The bar chart illustrates the distribution of variable “V1” from this study. Using the data in the table and graph, choose the most suitable measures of dispersion to report the spread of variable “V1”.

SD

IQR

Range

Min

Max

Lower Quartile

Upper Quartile

None of Above

Correct

Incorrect

Integral Bytes Question 13 of 21

13. Question

The table below shows the first 10 cases of a data set.

Variables
ID	V1	V2	V3
1	Red	25	1.62
2	Blue	35	1.58
3	Yellow	44	1.35
4	Green	28	1.54
5	Black	35	1.35
6	Brown	42	1.21
7	Blue	36	1.76
8	Pink	38	1.57
9	Green	30	1.47
10	Purple	40	1.18

The histogram illustrates the distribution of variable “V2” from this study. Using the data in the table and graph, choose the most suitable measure(s) of dispersion to report the spread of variable “V2”

SD

IQR

Range

Min

Max

Lower Quartile

Upper Quartile

Correct

Incorrect

Integral Bytes Question 14 of 21

14. Question

Which of the following statements are true?

The standard deviation of a variable represents approximately the average distance from the mean.

The wider the spread of the data, the larger the standard deviation.

The standard deviation is the best representation of the spread of variables that have outliers or extreme values

The upper quartile is the 25th percentile of the ordered data.

Correct

Incorrect
Integral Bytes Question 15 of 21

15. Question

Which of the following statements are true?

The inter-quartile range is the difference between the 5th percentile and the 95th percentile of the data.

The range of a variable is the difference between the smallest value and the largest value.

It is nearly always better to report the actual minimum and maximum rather than the range as this can show the limits

The box in a box and whisker plot represents the range of the data.

Correct

Incorrect
Integral Bytes Question 16 of 21

16. Question

Which of the following statements are true?

The standard deviation is not sensitive to outliers or extreme values.

The range is sensitive to outliers or extreme values.

The standard deviation is the square root of the variance.

Correct

Incorrect
Integral Bytes Question 17 of 21

17. Question

Which of the following are measures of dispersion?

Mean

Standard deviation

P value

Range (minimum to maximum)

Variance

Median

Confidence interval

Mode

Interquartile range (lower quartile to upper quartile)

Correct

Incorrect
Integral Bytes Question 18 of 21

18. Question

The heights (cm) of 6 children were measured as 141, 155, 130, 146, 141, 134.

What is the range of the data?

11

14

25

17.68

Correct

Incorrect
Integral Bytes Question 19 of 21

19. Question

What is the mean of following distribution

Marks

10

30

50

70

90

Number of Students

15

25

35

25

10

49.16

48.18

50

46.58

Correct

Incorrect
Integral Bytes Question 20 of 21

20. Question

What is the name of this type of graph?

Bar Graph

Pillar Graph

Histogram

Dot Plot

Correct

Incorrect
Integral Bytes Question 21 of 21

21. Question

What is the name of this type of graph?

Bar Chart

Pillar Chart

Histogram

Dot Plot

Correct

Incorrect