Deck 23: Conclusion

Question 1

The source of statistical inference is the sampling distribution.

Answer 1

True

Question 2

The standard normal distribution and the Chi-squared distribution are related to each other.

Answer 2

True

Question 3

The techniques used to analyze ordinal data involve a ranking procedure.

Answer 3

True

Question 4

Which type of data involves categories?

A) Interval data
B) Ordinal data
C) Nominal data
D) None of these

Question 5

The validity of any statistical outcome depends on the validity of its sample.

Question 6

A procedure with a very small probability of a Type I error will also have a very small probability of a Type II error.

Question 7

The Student-t and the F-distributions have no relationship to each other.

Question 8

The same statistical techniques apply whether the data is interval,nominal,or ordinal.

Question 9

Which type of data involves ratings?

A) Interval data
B) Ordinal data
C) Nominal data
D) None of these

Question 10

Which type of data involves real numbers?

A) Nominal data
B) Interval data
C) Ordinal data
D) None of these choices.

Question 11

We can use analysis of variance (ANOVA)in place of the t-test when comparing two population means.

Question 12

We can use regression analysis with indicator variables in place of analysis of variance (ANOVA).

Question 13

If the difference between the null hypothesis and your test statistic is very large,you reject the null hypothesis.

Question 14

Which of the following is NOT a type of data?

A) Parameter data
B) Nominal data
C) Ordinal data
D) Interval data

Question 15

A larger sample increases the confidence level of a confidence interval.

Question 16

If you use information about a sample to draw a conclusion about a population,you are doing:

A) Inferential parameters
B) Descriptive statistics
C) Inferential statistics
D) The wrong kind of statistics

Question 17

If the probability of making a Type II error decreases,the probability of making a Type I error increases.

Question 18

The techniques used to analyze nominal data involve a ranking procedure.

Question 19

In hypothesis testing,you start out assuming the null hypothesis is false.

Question 20

Statistical inferences are facts and are not based on probability.

Question 21

Which of the following is an example of ordinal data?

A) The weight of a newborn baby.
B) The gender of a baby.
C) The number of siblings a baby has.
D) Your order of preference of three baby names.

Question 22

The sampling distributions that are used for nominal data are the standard normal distribution and the:

A) Chi-squared distribution.
B) Binomial distribution.
C) F-distribution.
D) Interval distribution.

Question 23

____________________ techniques allow us to make estimates and draw conclusions about populations from samples.

Question 24

How do the requirements of nonparametric and parametric techniques compare?

A) Nonparametric techniques have more restrictions than parametric techniques.
B) Nonparametric techniques have fewer restrictions than parametric techniques.
C) Both types of techniques have the same requirements.
D) There are no requirements for parametric or nonparametric techniques.

Question 25

If the difference between our test statistic and the null hypothesis is large,we reject the ____________________ hypothesis.

Question 26

Formulas for confidence intervals and test statistics all come from ____________________ distributions.

Question 27

Which of the following is an example of interval data?

A) The weight of a newborn baby.
B) The gender of a baby.
C) Whether or not a baby weighs more than 10 pounds.
D) Your order of preference of three baby names.

Question 28

The standard that we use to decide whether or not to reject a null hypothesis is the probability of a(n)____________________.

Question 29

The width of a confidence interval ____________________ when more data is collected.

Question 30

We can improve the exactitude of a confidence interval estimator by increasing the ____________________.

Question 31

In analyzing interval data,we attempt to explain as much of the ____________________ as possible.

Question 32

The techniques used on ordinal data are based on ranking procedures.We call these ____________________ techniques.

Question 33

The sampling distributions that are used for interval data are the Student-t and the:

A) Chi-squared distribution.
B) Binomial distribution.
C) Discrete distribution.
D) F-distribution.

Question 34

We can decrease the probability of a Type II error by increasing the ____________________.

Question 35

If your hypothesis test has a very small probability for a Type I error,how does this affect the probability of a Type II error?

A) It will increase.
B) It will decrease.
C) It will be the same as for a Type I error.
D) No way of knowing without more information.

Question 36

Which of the following is an example of nominal data?

A) The gender of a baby.
B) The weight of a newborn baby.
C) The number of other babies born on the same day.
D) Your order of preference of three baby names.

Question 37

There are three types of data: ____________________;____________________;and ____________________.

Question 38

Which of the following statements is true?

A) Descriptive techniques summarize information from samples.
B) Inferential techniques allow us to make estimates about a population.
C) Inferential techniques allow us to draw conclusions about a population.
D) All of these statements are true.

Question 39

Which of the following data collection methods is more likely to lead to a definitive conclusion?

A) Data collected through observation.
B) Data collected through an experiment.
C) Data collected through the use of volunteers.
D) Data collected through a survey.

Question 40

In any hypothesis test there are two possible errors,called ____________________ and ____________________.

Question 41

We often use a(n)____________________ technique to analyze data when the conditions for a(n)____________________ technique are not satisfied.

Question 42

Two ways in which we can obtain data are through ____________________ or ____________________.

Question 43

To ensure the validity of a statistical technique,we must first check the required ____________________.

Question 44

One prevailing idea amongst statisticians is the idea of "Garbage in / garbage out." Explain the meaning of this phrase and give an example of it.

Question 45

Describe a plan for estimating the average GPA at your university by using inferential statistics.Include which statistical technique you plan to use to draw your conclusions.