unit 1 review questions

Question 1

Wealth disparity: Which line represents the median

Answer 1

B
Mean, median and mode

Question 2

The data must be… Interval level, ratio level or either

Answer 2

Either

Question 3

The labeling of the chart consistent with the chart’s graphing?

Answer 3

False
Count suggests discrete data s it should be a bar or pie chart not a line chart

Question 4

The dataset to the left is bi-modal?

Answer 4

True
Two highest points on the graph - 2 modes

Question 5

What is the range for the displayed dataset?

Answer 5

Largest - smallest = 22-6 = 16 (unit not frequency)
What is counted by measure - left column

Question 6

What value should be used to describe the dispersion within the data set

Answer 6

2.79 which is the sample standard deviation

Question 7

Two tables of the same data are inconsistent regarding..

Answer 7

N vs. frequency total

Question 8

Answers ranged from 1-7. The table on the left treats data as _ and the right treats data as a _

Answer 8

Interval - calculating sd, mean (interval ratio calculations)
Ordinal - ranked order

Question 9

Which would slightly improve the graph?

Answer 9

Include 1 on x-axis

Question 10

What is wrong with the graph. 1-7

Answer 10

No x or y labels
“Number of” in the title
1-7 scale doesn’t need number of
B and C

Question 11

The table accurately captures and displays the responses. Chart is what is your gpa and from 1-7 is attending sdsu a big deal

Answer 11

No. False
Took two questions and combined it into one table

Question 12

What measure of central tendency is always determine without using a formula

Answer 12

mode

Question 13

Which of the above measures is not affected by outliers

Answer 13

mode and median

Question 14

Responses for qualitative data are _ and responses for quantitative data are _

Answer 14

descriptive/categorical
Numerical

Question 15

Qualitative data is tallied by _ and quantitative data is tallied by _

Answer 15

Counting
Measuring or counting

Question 16

Dynamic, statistical analysis can be performed on _?

Answer 16

Quantitative data

Question 17

Which of the following distributions variable of interest is number of trials before first success

Answer 17

geometric

Question 18

Will we never calculate a cumulative probability that is x or more OR more than x

Answer 18

Geometric
When you get your first success you’re done

Question 19

The binomial distribution has a fixed number of trials, geometric has a fixed number of success

Answer 19

both are true

Question 20

Caller calls randomly picked ballers that has a letter and number… If we want to calculate the probability of player winning after 14 balls have been called we should use the

Answer 20

hypergeometric

Question 21

The binomial distribution has an indefinite number of trials and the geometric distribution has a fixed number of trials

Answer 21

false

Question 22

Which of the following distributions has dependent trials

Answer 22

hypergeometric

Question 23

For the binomial distribution which of the following is true

Answer 23

p + q = 1

Question 24

For any distribution as the random variable x gets further awaythe probability of that X happening..

Answer 24

Decreases
Less likely to happen
Visualize normal distribution (tails less likely to happen)

Question 25

_ of the cases fall between +/- 3 sigma in a standard normal distribution

Answer 25

99.73

Question 26

What variables define the standard normal distribution

Answer 26

mean and sd

Question 27

What is the probability for: x = 100?

Answer 27

0%

this one had a piece missing so :/

Question 28

Corporate randomly selects 4 cities and surveys all holders in selected cities. This is an example of..

Answer 28

cluster sampling

Question 29

After submitting my quiz I should..

Answer 29

Log out, sign out with instructor by showing my ID, leave quietly

Question 30

mean median and mode

Answer 30

Mean always pulled by outlier
Median always in middle
Mode is always the highest point

Question 31

If mean > median then…

Answer 31

The shape of the distribution is skewed to the right