QUESTION 1 Classify the data as Qualitative or Quantitative

QUESTION 1

Classify the data as Qualitative or Quantitative
Classification of the Pulmonary Emphysema as: {mild, moderate, severe}

Qualitative

Quantitative

4 points

QUESTION 2

The following is a frequency distribution. Are the classes correctly constructed? If no, explain why not (you might have more than one reason).

Class
123-127
128-133
134-140
141-147
148-156

Path: p

Words:0

4 points

QUESTION 3

A statistic is derived from the:

Set of parameters

None of the above

Population

Sample Data

4 points

QUESTION 4

consider the following set of data:

0 1 3 2 0 3 3 4 2

The normalized z score for 2 will be

a negative number

a positive number

equal to zero

none of the above

4 points

QUESTION 5

The calendar year (for example year of 2013) is considered to a measurement of type:

Qualitative

Ratio

Interval

Nominal

4 points

QUESTION 6

Qualitative data can be:

continuous and discrete

discrete

either continuous or discrete

none of the above

4 points

QUESTION 7

By taking a systematic sample, in which we select every 20th shopper arriving at a specific store, we are approximating a random sample of shoppers.

True

False

4 points

QUESTION 8

Descriptive statistics include presentations of data in form of histograms, charts, tables.

True

False

4 points

QUESTION 9

At a pets lovers meeting you might wish to know for a pet selected at random the probability that the pet is cat or dog. The most appropriate correct formula will be:

P(C)+P(D)

P(C)+P(D)-P(C and D)

P(C and D)/P(C)

4 points

QUESTION 10

Appropriate statistics for Ordinal measurements are:

mean and median

mode and mean

mode, frequency, median

mean, frequency, mode

4 points

QUESTION 11

On Nominal data is appropriate to perform the following statistic(s):

average

average and mode

mean and mode

mode and / or frequency

4 points

QUESTION 12

Classify the variable as Discrete or Continuous
Number of students enrolled in this course

Discrete

Continuous

4 points

QUESTION 13

If two events are independent it implies that they are mutually exclusive

True

False

4 points

QUESTION 14

The science of using a sample to make generalizations about the important aspects of a population is known as

Statistical inference

A random sample

Descriptive Statistics

Statistical Process Control

4 points

QUESTION 15

A probability value can be in the range:

- and +

-1 to +1

-100 to +100

0 to 1

4 points

QUESTION 16

Classify the data as Qualitative or Quantitative
Number of blocks to the subway station.

Qualitative

Quantitative

4 points

QUESTION 17

The following is a frequency distribution. Are the classes correctly constructed? If no, explain why not.

Class
10-15
15-20
20-25
25-30
30-35

Path: p

Words:0

4 points

QUESTION 18

The following statistics are unique for a given set of data:

mean and mode

median and mean

median and mode

4 points

QUESTION 19

If events A and B are mutually exclusive, then P(A|B) is always equal to zero.

True

False

4 points

QUESTION 20

Type of skewness: The following data set will have a skewness because

#of 6oz glasses of fluid consumed /day
0 1 6 5 7 4 7 6 8 7 9 5 6

4 points

QUESTION 21

Select the best answer.
The number of absences per year that a student can have is an example of what type of data?

discrete

continuous

qualitative

nominal

4 points

QUESTION 22

A characteristic of a population is called a

measurement

observation

sample

parameter

4 points

QUESTION 23

True or False?
The highest level of measurement (on which you can perform the highest number of measurements) is the Ratio level.

True

False

4 points

QUESTION 24

Consider the set of grades obtained in quiz1.
The average of those grades will give us an accurate information of how good we did in the quiz compared to the other students.

True

False

4 points

QUESTION 25

A better measure of dispersion when comparing two data sets in different units is:

Variance

Coefficient of variation

Standard deviation

Variance