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Midterm Review

Total questions: 80

Worksheet time: 20hrs 0mins

Name
Class
Date
1.

the science of collecting, organizing, analyzing, and interpreting data in order to make decisions

a)

statistic

b)

Statistics

c)

descriptive statistics

d)

inferential statistics

2.

consists of information coming from observations, counts, measurements, or responses

a)

data

b)

population

c)

Qualitative data

d)

Descriptive Statistics

3.

collection of ALL outcomes, responses, measurements, or counts that are of interest

a)

Statistics

b)

data

c)

survey

d)

population

4.

subset of a population

a)

sampling

b)

sample

c)

statistic

d)

data

5.

A parameter is a numerical description of a _____ characteristic.

a)

percentage

b)

sample

c)

population

d)

statistic

6.

A ________ is a numerical description of a sample characteristic.

a)

population

b)

statistic

c)

parameter

d)

Statistics

7.

Descriptive statistics...

a)

is the branch of statistics that involves the organization, summarization, and display of data.

b)

is the branch of statistics that involves using a sample to draw conclusions about a population.

c)

consists of attributes, labels, or nonnumerical entries.

d)

consists of numerical measurements or counts.

8.

Data at the nominal level of measurement are...

a)

qualitative only

b)

quantitative only

c)

quantitative or qualitative

d)

none of the above.

9.

Data at the ordinal level of measurement are...

a)

qualitative only

b)

quantitative only

c)

quantitative or qualitative

d)

none of the above.

10.

Data at the interval level of measurement are...

a)

qualitative only

b)

quantitative only

c)

quantitative or qualitative

d)

none of the above.

11.

Data at the ratio level of measurement are...

a)

qualitative only

b)

quantitative only

c)

quantitative or qualitative

d)

none of the above.

12.

At the ratio level of measurement, there is an inherent zero.

a)

True

b)

False

13.

At the interval level of measurement, there is an inherent zero.

a)

True

b)

False

14.

At the interval level of measurement, you cannot calculate meaningful differences between data entries.

a)

True

b)

False

15.

An observational study is a sampling technique.

a)

True

b)

False

16.

Which of the following are methods for collecting data?

a)

survey

b)

experiment

c)

census

d)

simulation

17.

If I divide the student population at Ware Shoals by grade level and then select 20 students from each grade, what sampling technique am I using?

a)

systematic

b)

cluster

c)

stratified

d)

random sample

18.

If I divide the student population at Ware Shoals by grade level and then select all the students from 11th grade, what sampling technique am I using?

a)

systematic

b)

cluster

c)

stratified

d)

random sample

19.

If I ask every student in all of my classes how many pets they have, what type of statistical study am I conducting?

a)

a survey

b)

an experiment

c)

a simulation

d)

a sampling

20.

If I ask every 10th student who enters Ware Shoals high school how tall they are, what sampling technique am I using?

a)

systematic

b)

cluster

c)

stratified

d)

random sample

21.

What kind of sampling technique does a raffle use?

a)

systematic

b)

cluster

c)

stratified

d)

random sample

22.

If I assign each of my students a number and then use a random number generator to choose 25 students, what type of sampling technique am I using?

a)

systematic

b)

cluster

c)

stratified

d)

random sample

23.

What is a simulation?

a)

A count or measure of a part of a population

b)

Applying a treatment to part of a population, using the second part of the population as a control group, responses are observed and results are recorded

c)

an investigation of one or more characteristics of a population

d)

A mathematical or physical model to reproduce conditions of a situation or process

24.

What is an experiment?

a)

A count or measure of a part of a population

b)

Applying a treatment to part of a population, using the second part of the population as a control group, responses are observed and results are recorded

c)

an investigation of one or more characteristics of a population

d)

A mathematical or physical model to reproduce conditions of a situation or process

25.

What is a survey?

a)

A count or measure of a part of a population

b)

Applying a treatment to part of a population, using the second part of the population as a control group, responses are observed and results are recorded

c)

an investigation of one or more characteristics of a population

d)

A mathematical or physical model to reproduce conditions of a situation or process

26.

What is a sampling?

a)

A count or measure of a part of a population

b)

Applying a treatment to part of a population, using the second part of the population as a control group, responses are observed and results are recorded

c)

an investigation of one or more characteristics of a population

d)

A mathematical or physical model to reproduce conditions of a situation or process

27.

What is the type of data?


Phone numbers from every single person in the class

a)

nominal level

b)

descriptive

c)

qualitative

d)

quantitative

28.

What is the type of data?


The number of pets each student has

a)

nominal level

b)

descriptive

c)

qualitative

d)

quantitative

29.

What is the type of data?


each student's car color

a)

nominal level

b)

descriptive

c)

qualitative

d)

quantitative

30.

What is the type of data?


each student's height

a)

ratio level

b)

descriptive

c)

qualitative

d)

quantitative

31.

Which level of measurement would the following data belong to?


Runners in a race (1st place, 2nd place, 3rd place, etc.)

a)

nominal

b)

ordinal

c)

interval

d)

ratio

32.

Which level of measurement would the following data belong to?


Temperatures recorded in a year in Antarctica

a)

nominal

b)

ordinal

c)

interval

d)

ratio

33.

Which level of measurement would the following data belong to?


Heights of skyscrapers in New York City

a)

nominal

b)

ordinal

c)

interval

d)

ratio

34.

Which level of measurement would the following data belong to?


Lengths of fish caught by the Ware Shoals fishing team

a)

nominal

b)

ordinal

c)

interval

d)

ratio

35.

Is the following numerical description a parameter or statistic?


In a survey of 100 single mothers living in America, 56% of them had more than one child.

a)

parameter

b)

statistic

36.

Is the following numerical description a parameter or statistic?


A study from the National Center for Health Statistics at the CDC showed that 39.6% of US adults were obese.

a)

parameter

b)

statistic

37.

Does the following study use descriptive or inferential statistics?


A large sample of married men was studied for 18 years. 90% were alive at age 65.

a)

Descriptive

b)

Inferential

38.

Does the following use descriptive or inferential statistics?


A large sample of men was studied for 18 years. For unmarried men, 70% were alive at 65. 90% of married men were alive at age 65. From this observation, scientists concluded that being married is associated with a longer life for men.

a)

Descriptive

b)

Inferential

c)

Both

d)

Neither

39.

Is the following question biased?


"Why is John Adams the best president America has ever had?"

a)

yes

b)

no

40.

Is the following question biased:


"What do you think about the current president's foreign policy?"

a)

yes

b)

no

41.

A frequency histogram is...

a)

a bar graph in which the class boundaries are on the y-axis and the frequencies are on the x-axis.

b)

a bar graph in which the class boundaries are on the x-axis and the frequencies are on the y-axis.

c)

a line graph in which the class boundaries are on the y-axis and the frequencies are on the x-axis.

d)

a line graph in which the class boundaries are on the x-axis and the frequencies are on the y-axis.

42.

To find class boundaries...

a)

one must add the class limits together and divide by two.

b)

one must subtract 0.5 from the upper limit and add 0.5 to the lower limit.

c)

one must subtract 0.5 from the lower limit and add 0.5 to the upper limit.

d)

one must add the class width to the lower limit.

43.

An ogive is

a)

a frequency histogram.

b)

a frequency polygon.

c)

a relative frequency histogram.

d)

a cumulative frequency line graph.

44.

Which of the following graphs can represent quantitative data?

a)

pie chart

b)

stem-and-leaf plot

c)

dot plot

d)

Pareto chart

45.

Which of the following graphs can represent qualitative data?

a)

pie chart

b)

stem-and-leaf plot

c)

dot plot

d)

Pareto chart

46.

Which of the following can represent bi-variate data sets?

a)

scatter plot

b)

pie chart

c)

time-series chart

d)

stem-and-leaf chart

47.

Which of the following are the measures of central tendency?

a)

mean

b)

median

c)

mode

d)

z-score

48.

What is the mode for the following set of data?

1, 2, 2, 3, 4, 5, 6, 7, 8, 9

a)

2

b)

bimodal: 2 and 6

c)

no mode

49.

What is the mean for the following set of data?

1, 2, 2, 3, 4, 5, 6, 7, 8, 9

a)

2

b)

4.5

c)

there is no mean

d)

4.7

50.

What is the median for the following set of data?

1, 2, 2, 3, 4, 5, 6, 7, 8, 9

a)

2

b)

4.5

c)

there is no mean

d)

4.7

51.

An outlier is

a)

a data entry that is far removed from the other entries in the data set.

b)

a number that is outside of the brackets.

c)

another name for the mean of a data set.

d)

another name for the mode of a data set.

52.

Which of the following are shapes of distributions?

a)

symmetric

b)

uniform

c)

skewed left

d)

skewed right

53.
a)

skewed right

b)

uniform

c)

symmetric

d)

skewed left

54.

Another name(s) for symmetric is...

a)

uniform

b)

normal

c)

bell curve

d)

rectangular

55.

What is the symbol for population size?

a)

n

b)

N

c)

μ\mu

d)

σ\sigma

56.

What is the symbol for population mean?

a)

n

b)

N

c)

μ\mu

d)

σ\sigma

57.

How do you find the range of a data set?

a)

min⁡max⁡\frac{\min}{\max}

b)

min⁡−max⁡\min-\max

c)

max⁡min⁡\frac{\max}{\min}

d)

max⁡−min⁡\max-\min

58.

What is the symbol for sample size?

a)

n

b)

N

c)

μ\mu

d)

σ\sigma

59.

What is the symbol for standard deviation?

a)

n

b)

N

c)

μ\mu

d)

σ\sigma

60.

If the variance of a data set is 16, what is the standard deviation?

a)

256

b)

4

c)

32

d)

64

61.

If the standard deviation of a data set is 16, what is the variance?

a)

256

b)

4

c)

32

d)

64

62.

Which of the following are fractiles?

a)

percentiles

b)

deciles

c)

quadrilles

d)

quartiles

63.

How do you find the IQR of a data set?

a)

Q4 - Q1

b)

Q4 - Q2

c)

Q3 - Q1

d)

Q3 - Q2

64.

What is included in the five-number summary of a data set?

a)

min, max, mean, median, IQR

b)

min, Q1, median, Q3, max

c)

min, Q1, mean, Q3, max

d)

min, max, Q1, Q3, IQR

65.

If the mean is 10 and the standard deviation is 2, what is the z-score of 8?

a)

4

b)

-4

c)

1

d)

-1

66.

If the mean is 25 and the standard deviation is 5, what is the z-score of 35?

a)

2

b)

-2

c)

1

d)

-1

67.

Theoretical probability is what...

a)

should happen

b)

has happened in the past

68.

Experimental probability is what...

a)

should happen

b)

has happened in the past

69.

What is the theoretical probability of rolling a die and landing on a 2 or 6?

P(2 or 6)=

a)

2/6

b)

1/6

c)

1/3

d)

2/3

70.

What is the theoretical probability of drawing a spade from a deck of cards?

a)

13/ 52

b)

1/ 4

c)

1/ 52

d)

4/ 13

71.

What is a sample space?

a)

a trial through which measures, counts, or results are obtained

b)

the result of a single trial

c)

the set of all possible outcomes of a probability experiment

72.

What is an outcome?

a)

a trial through which measures, counts, or results are obtained

b)

the result of a single trial

c)

the set of all possible outcomes of a probability experiment

73.

What is a probability experiment?

a)

a trial through which measures, counts, or results are obtained

b)

the result of a single trial

c)

the set of all possible outcomes of a probability experiment

74.

When analyzing bi-variate data, correlation means causation.

a)

true

b)

false

75.

What is another name for the regression line?

a)

correlation coefficient

b)

line of best fit

c)

correlation line

d)

the y-line

76.

"y-hat" is the...

a)

actual y-value

b)

residual

c)

predicted y-value

d)

y-value that is nervous about his bald patch, so he wears a hat

77.

How do we find the residual, d?

a)

"y-hat" - y

b)

y - "y-hat"

78.

What is the residual?

a)

the correlation coefficient

b)

the predicted y-value

c)

the distance between the actual y-value and the predicted y-value

79.

When you are writing a graphical analysis, what is the second sentence about?

a)

who conducted the statistical study

b)

your opinion about the statistical study

c)

when the statistical study was conducted

d)

what the author found during the study

80.

Are you going to pass this midterm?

a)

yes

b)

YES

c)

of course

d)

Oh yeah!

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