Question 1

When experimental results are significant,this means that the ______ hypothesis has been ______.

Accepted Answer

A) experimental;rejected 
B) alternative;rejected 
C) null;accepted 
D) null;rejected 
A) experimental;rejected 
B) alternative;rejected 
C) null;accepted 
D) null;rejected

Question 2

Suppose you have randomly selected high school students to take a course to improve their SAT scores.You find that the mean of their subsequent SAT scores is not significantly different from the population mean of SAT scores for those students who have not taken the course.Which of the following statements is the most appropriate conclusion?

Accepted Answer

A) We have proven that the course does not affect SAT scores. 
B) We have obtained evidence consistent with the notion that the course has an effect on SAT scores. 
C) We have obtained no convincing evidence that the course affects SAT scores. 
D) The evidence suggests that the course may have an effect on SAT scores. 
A) We have proven that the course does not affect SAT scores. 
B) We have obtained evidence consistent with the notion that the course has an effect on SAT scores. 
C) We have obtained no convincing evidence that the course affects SAT scores. 
D) The evidence suggests that the course may have an effect on SAT scores.

Question 3

For   and   ,what is the appropriate outcome of a z-test?

Accepted Answer

A)    Reject   and accept
  . 
B)    Reject   and accept
  . 
C)    Reject   and accept
  . 
D)    Fail to reject   . 
A)    Reject   and accept
  . 
B)    Reject   and accept
  . 
C)    Reject   and accept
  . 
D)    Fail to reject   .

Question 4

The key difference between parametric and nonparametric procedures is that parametric procedures

Accepted Answer

A) do not require that stringent assumptions be met. 
B) require that certain assumptions be met. 
C) are used for population distributions that are skewed. 
D) are used for population distributions that have nominal scores. 
A) do not require that stringent assumptions be met. 
B) require that certain assumptions be met. 
C) are used for population distributions that are skewed. 
D) are used for population distributions that have nominal scores.

Question 5

If   and   ,what is the value of   ?

Accepted Answer

A) 2.31 
B) -1.30 
C) -0.38 
D) -2.31 
A) 2.31 
B) -1.30 
C) -0.38 
D) -2.31

Question 6

For   and   ,what is the appropriate outcome of a z-test?

Accepted Answer

A)    Fail to reject   . 
B)    Reject   and accept
  . 
C)    Reject   and accept
  . 
D)    Fail to reject   . 
A)    Fail to reject   . 
B)    Reject   and accept
  . 
C)    Reject   and accept
  . 
D)    Fail to reject   .

Question 7

If   and   what is the value of   ?

Accepted Answer

A) 0.20 
B) 5.00 
C) 0.60 
D) 1.00 
A) 0.20 
B) 5.00 
C) 0.60 
D) 1.00

Question 8

The population mean for the Elementary Tenacity Test (ETT)is 150,with   .A recent study of elementary school children participating in a school lunch program obtained the following ETT scores.Use a two-tailed z-test and   . 145 180 176 152 148 142 179 163 159 154
167 172 146 169 157 150 161 160 153 165

Accepted Answer

A)    Fail to reject   . 
B)    Reject   and accept
  . 
C)    Fail to reject   . 
D)    Reject   and accept
  . 
A)    Fail to reject   . 
B)    Reject   and accept
  . 
C)    Fail to reject   . 
D)    Reject   and accept
  .

Question 9

If   and   what is the value of   ?

Accepted Answer

A) 2.58 
B) 0.52 
C) -2.58 
D) 0.78 
A) 2.58 
B) 0.52 
C) -2.58 
D) 0.78

Question 10

Which of the following is true of any one-sample experiment?

Accepted Answer

A) We must know the population mean under the same condition of the independent variable as the one being tested. 
B) We must know the population mean under some condition of the independent variable other than the one being tested. 
C) We must know the sample mean under the condition of the independent variable being tested,but we do not need to know the population mean. 
D) We must know the sample mean under the condition of the independent variable being tested and under some other condition of the independent variable. 
A) We must know the population mean under the same condition of the independent variable as the one being tested. 
B) We must know the population mean under some condition of the independent variable other than the one being tested. 
C) We must know the sample mean under the condition of the independent variable being tested,but we do not need to know the population mean. 
D) We must know the sample mean under the condition of the independent variable being tested and under some other condition of the independent variable.

Question 11

Inferential statistics are used to

Accepted Answer

A) decide whether sample data accurately represent a particular relationship in the population. 
B) get rid of sampling error. 
C) improve sampling error. 
D) decide whether the population causes a particular relationship in the sample data. 
A) decide whether sample data accurately represent a particular relationship in the population. 
B) get rid of sampling error. 
C) improve sampling error. 
D) decide whether the population causes a particular relationship in the sample data.

Question 12

Suppose that a population is known to have a mean of 80.If a researcher predicts the experimental treatment will produce an increase in the population mean,then the null hypothesis for this statistical hypothesis test would state

Accepted Answer

A) µ > 80 B) µ F1F1F1S1F1F1F10 80 C) µ F1F1F1S1F1F1F10 80 D) µ < 80 A) µ > 80 B) µ F1F1F1S1F1F1F10 80 C) µ F1F1F1S1F1F1F10 80 D) µ < 80

Question 13

Which of the following describe(s)the situation if the relationship you are testing in your experiment really exists?

Accepted Answer

A) The null hypothesis 
B) The statistical hypotheses 
C) The real-world hypothesis 
D) The alternative hypothesis 
A) The null hypothesis 
B) The statistical hypotheses 
C) The real-world hypothesis 
D) The alternative hypothesis

Question 14

To determine whether a new drug that is supposed to lower a person's heart rate is effective or not,Dr.Johnson gives the medicine to a random sample of 100 patients with rapid heart rhythm (RHR)and obtains a sample mean of 128.Dr.Johnson knows that the heart rate of the population of individuals with RHR is 135,with   .If Dr.Johnson uses a one-tailed test and   ,what is the appropriate conclusion?

Accepted Answer

A)    Fail to reject   . 
B)    Fail to reject   . 
C)    Fail to reject   . 
D)    Reject   and accept
  . 
A)    Fail to reject   . 
B)    Fail to reject   . 
C)    Fail to reject   . 
D)    Reject   and accept
  .

Question 15

The Physical Fitness Test (National Level for Girls)shows the national average for 10-year-old girls on "right-angle push-ups" to be   = 13.Principal Smyth hypothesizes that her girls at Strong School are significantly above the national mean.If the   and the scores for nine girls are as reported here,compute   and determine if Principal Smyth is right.Use   . 14 16 18 16 12 16 17 20 15

Accepted Answer

A)    ,so Principal Smyth is right. 
B)    ,so Principal Smyth is wrong. 
C)    ,so Principal Smyth is right. 
D)    ,so Principal Smyth is wrong. 
A)    ,so Principal Smyth is right. 
B)    ,so Principal Smyth is wrong. 
C)    ,so Principal Smyth is right. 
D)    ,so Principal Smyth is wrong.

Question 16

When choosing between one-tailed and two-tailed tests,

Accepted Answer

A) use a one-tailed test only if you have a convincing reason for predicting the direction. 
B) always use two-tailed tests. 
C) use a two-tailed test only if you have a convincing reason for not predicting a direction. 
D) use the one that is most likely to produce significant results. 
A) use a one-tailed test only if you have a convincing reason for predicting the direction. 
B) always use two-tailed tests. 
C) use a two-tailed test only if you have a convincing reason for not predicting a direction. 
D) use the one that is most likely to produce significant results.

Question 17

For   and   ,what is the appropriate outcome of a z-test?

Accepted Answer

A)    Reject   and accept
  . 
B)    Reject   and accept
  . 
C)    Reject   and accept
  . 
D)    Fail to reject   . 
A)    Reject   and accept
  . 
B)    Reject   and accept
  . 
C)    Reject   and accept
  . 
D)    Fail to reject   .

Question 18

Which of the following accurately defines a Type II error?

Accepted Answer

A) Rejecting   when it is true 
B) Rejecting   when it is false 
C) Failing to reject   when it is true 
D) Failing to reject   when it is false 
A) Rejecting   when it is true 
B) Rejecting   when it is false 
C) Failing to reject   when it is true 
D) Failing to reject   when it is false

Question 19

Which of the following is correct regarding alternative hypotheses?

Accepted Answer

A) They are alternatives to the experimental hypotheses. 
B) They state the predicted relationship if the sample statistic does not fall in the region of rejection. 
C) They describe the population parameters represented by the sample data if the predicted relationship exists. 
D) They describe the population parameters represented by the sample data if the predicted relationship does not exist. 
A) They are alternatives to the experimental hypotheses. 
B) They state the predicted relationship if the sample statistic does not fall in the region of rejection. 
C) They describe the population parameters represented by the sample data if the predicted relationship exists. 
D) They describe the population parameters represented by the sample data if the predicted relationship does not exist.

Question 20

Why do we perform inferential statistics?

Accepted Answer

A) Because we know our sample is not representative. 
B) Because it is possible we are being misled by sampling error. 
C) Because we want to describe the characteristics of the population. 
D) Because we need to be certain we make the correct decision. 
A) Because we know our sample is not representative. 
B) Because it is possible we are being misled by sampling error. 
C) Because we want to describe the characteristics of the population. 
D) Because we need to be certain we make the correct decision.

When experimental results are significant,this means that the hypothesis has been .

For and ,what is the appropriate outcome of a z-test?

The key difference between parametric and nonparametric procedures is that parametric procedures

If and ,what is the value of ?

For and ,what is the appropriate outcome of a z-test?

If and what is the value of ?

The population mean for the Elementary Tenacity Test (ETT)is 150,with .A recent study of elementary school children participating in a school lunch program obtained the following ETT scores.Use a two-tailed z-test and . 145 180 176 152 148 142 179 163 159 154 167 172 146 169 157 150 161 160 153 165

If and what is the value of ?

Which of the following is true of any one-sample experiment?

Inferential statistics are used to

Suppose that a population is known to have a mean of 80.If a researcher predicts the experimental treatment will produce an increase in the population mean,then the null hypothesis for this statistical hypothesis test would state

Which of the following describe(s)the situation if the relationship you are testing in your experiment really exists?

When choosing between one-tailed and two-tailed tests,

For and ,what is the appropriate outcome of a z-test?

Which of the following accurately defines a Type II error?

Which of the following is correct regarding alternative hypotheses?

Why do we perform inferential statistics?

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Central Tendency;the Mean, median, and Mode

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

The Correlation Coefficient

Linear Regression

Using Probability to Make Decisions About Data

Performing the One-Sample T-Test and Testing Correlation Coefficients

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

Exam 10: Introduction to Hypothesis Testing

When experimental results are significant,this means that the ______ hypothesis has been ______.

For and ,what is the appropriate outcome of a z-test?

The key difference between parametric and nonparametric procedures is that parametric procedures

If and ,what is the value of ?

For and ,what is the appropriate outcome of a z-test?

If and what is the value of ?

The population mean for the Elementary Tenacity Test (ETT)is 150,with .A recent study of elementary school children participating in a school lunch program obtained the following ETT scores.Use a two-tailed z-test and . 145 180 176 152 148 142 179 163 159 154 167 172 146 169 157 150 161 160 153 165

If and what is the value of ?

Which of the following is true of any one-sample experiment?

Inferential statistics are used to

Suppose that a population is known to have a mean of 80.If a researcher predicts the experimental treatment will produce an increase in the population mean,then the null hypothesis for this statistical hypothesis test would state

Which of the following describe(s)the situation if the relationship you are testing in your experiment really exists?

When choosing between one-tailed and two-tailed tests,

For and ,what is the appropriate outcome of a z-test?

Which of the following accurately defines a Type II error?

Which of the following is correct regarding alternative hypotheses?

Why do we perform inferential statistics?

Introduction to Statistics

Statistics and the Research Process

Frequency Distributions and Percentiles

Measures of Central Tendency;the Mean, median, and Mode

Measures of Variability: Range, variance, and Standard Deviation

Z-Scores and the Normal Curve

The Correlation Coefficient

Linear Regression

Using Probability to Make Decisions About Data

Performing the One-Sample T-Test and Testing Correlation Coefficients

The Two-Sample T-Test

The One-Way Analysis of Variance

The Two-Way Analysis of Variance

Chi Square and Other Nonparametric Procedures

Filters

When experimental results are significant,this means that the hypothesis has been .