Data Management

Question 1

Collection of measured information about a certain group of living or nonliving things

Answer 1

Data

Question 2

Only a single measurement is obtained

Answer 2

Univariate data

Question 3

Two or more measurements are obtained

Answer 3

Multivariate data

Question 4

One of the necessary tools in data management

Answer 4

Statistics

Question 5

Collection, organization, summarization, presentation, and interpretation of data

Answer 5

Statistics

Question 6

3 ways of data collection

Answer 6

1. Conducting a survey
2. Conducting a planned experiment
3. Collecting from an external source

Question 7

Is statistics inductive or deductive in nature?

Answer 7

Inductive

Question 8

Why is statistics inductive in nature?

Answer 8

We draw conclusions about the whole phenomena on the basis of a comparatively smaller data.

Question 9

A single number that can represent the “center” of all the observations in a data set

Answer 9

Measure of central tendency/average

Question 10

Three most common averages or measures of central tendency

Answer 10

1. Mean
2. Median
3. Mode

Question 11

Sum of the individual data values divided with the number of observations

Answer 11

Mean

Question 12

Number that occurs most frequently in your data set

Answer 12

Mode

Question 13

Observation or measurement at the middle of the data set, splitting the data set into two equal parts

Answer 13

Median

Question 14

If there is no data value/s that occur most frequently, then the data set has no mode. True or False?

Answer 14

True

Question 15

If the greatest frequency occurs at exactly two values, then the data set is said to be _____.

Answer 15

Bimodal

Question 16

If the mode has only a single value, then the data set is said to be _____.

Answer 16

Unimodal

Question 17

Applications of mean

Question 18

Applications of median

Question 19

Applications of mode

Answer 19

• Counting the number of F grades of students
• Best-selling restaurant

Question 20

Describes the spread of data in a distribution

Answer 20

Measures of dispersion

Question 21

Difference between the highest data observation H and lowest data observation L

Answer 21

Range

Question 22

The set with the largest range means it is the _____ among the data sets.

Answer 22

most dispersed

Question 23

The smaller the range, the _____ the data

Answer 23

more consistent

Question 24

Average of the squares of the deviations of the data values about their mean

Answer 24

Variance

Question 25

Population variance is denoted by _____.

Answer 25

σ2

Question 26

The mean of a population variance is denoted by _____.

Answer 26

μ

Question 27

Positive square root of the variance

Answer 27

Standard deviation

Question 28

The more variable the data set, the _____ the value of the standard deviation

Answer 28

Larger

Question 29

When does the standard deviation become zero?

Answer 29

If all the measurements have the same value

Question 30

What is the unit of measurement of the standard deviation?

Answer 30

Same unit as the data

Question 31

If the graph is the symmetric, then the middle value is the _____.

Answer 31

Mean

Question 32

The number of standard deviations between a data value and the mean is known as the data value's _____

Answer 32

z-score

Question 33

It forms a bell-shaped curve that is symmetric about a vertical line through the mean of the data.

Answer 33

Normal distribution

Question 34

Describe the mean, median, and mode of a normal distribution

Answer 34

They are all equal and located at the center of the distribution

Question 35

The total area under the curve is _____.

Answer 35

1

Question 36

How does the standard deviation affect the normal distribution?

Answer 36

The larger the standard deviation, the flatter the curve of the normal distribution becomes

Question 37

5 Properties of the Normal Distribution

Answer 37

1. The graph is symmetric about a vertical line through the mean of the data set. 2. The mean, median, and mode are equal. 3. The total area of the bell-shaped curve is 1. 4. The areas under the curve that are symmetric about the mean are equal. 5. The y-value of each on the curve is the percent (expressed as a decimal) of the data at the corresponding x-value.

Question 38

Normal distribution that has a mean of 0 and a standard deviation of 1

Answer 38

Standard normal distribution

Question 39

What does the empirical rule tell us?

Answer 39

It gives us an approximation of what percent of the data falls under certain intervals in normal distributions.

Question 40

_____% of the data lie within 1 standard deviation away from the mean.

Answer 40

68%

Question 41

_____% of the data lie within 2 standard deviations away from the mean.

Answer 41

95%

Question 42

_____% of the data lie within 1 standard deviation away from the mean.

Answer 42

99.7%