Question 1

Probability is

Accepted Answer

A) the study of likelihood and uncertainty.​ 
B) the number of ways a particular outcome can occur divided by the total number of outcomes. 
C) the process of determining whether a hypothesis is supported by the results of a research study. 
D) both the study of likelihood and uncertainty and the number of ways a particular outcome can occur divided by the total number of outcomes. 
A) the study of likelihood and uncertainty.​ 
B) the number of ways a particular outcome can occur divided by the total number of outcomes. 
C) the process of determining whether a hypothesis is supported by the results of a research study. 
D) both the study of likelihood and uncertainty and the number of ways a particular outcome can occur divided by the total number of outcomes.

Question 2

What is the probability of rolling a 3 in a single roll of a die?

Accepted Answer

A) 0.50​ 
B) 1.0 
C) 0.25 
D) 0.17 
A) 0.50​ 
B) 1.0 
C) 0.25 
D) 0.17

Question 3

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 120 or less pounds?

Accepted Answer

​Z = -0.20

Question 4

What is the probability of a couple having two children in the following order: girl, boy?​

Accepted Answer

A) 0.0625 
B) 0.125 
C) 0.25 
D) 0.50 
A) 0.0625 
B) 0.125 
C) 0.25 
D) 0.50

Question 5

What is the probability of pulling a heart from a standard (52-card) deck of playing cards?

Accepted Answer

A) 0.25​ 
B) 0.50 
C) 0.75 
D) 1.0 
A) 0.25​ 
B) 0.50 
C) 0.75 
D) 1.0

Question 6

What is the probability of pulling a jack from a standard (52-card) deck of playing cards?​

Accepted Answer

A) 0.019 
B) 0.077 
C) 0.15 
D) 0.25 
A) 0.019 
B) 0.077 
C) 0.15 
D) 0.25

Question 7

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 170 or more pounds?
​

Accepted Answer

​Z = 0.50,

Question 8

What is the probability of a couple having four children in the following order: girl, girl, girl, boy?

Accepted Answer

A) 0.0625 
B) 0.125 
C) 0.25 
D) 0.50 
A) 0.0625 
B) 0.125 
C) 0.25 
D) 0.50

Question 9

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower or 500 or higher on the test?​

Accepted Answer

A) 0.12 
B) 0.22 
C) 0.45 
D) 0.66 
A) 0.12 
B) 0.22 
C) 0.45 
D) 0.66

Question 10

Imagine that you have a bag filled with 10 pink marbles and 5 black marbles. What is the probability of pulling a black marble from the bag?​

Accepted Answer

A) 0.25 
B) 0.33 
C) 0.50 
D) 0.67 
A) 0.25 
B) 0.33 
C) 0.50 
D) 0.67

Question 11

What is the probability of drawing either a club or a spade from a standard (52-card) deck of playing cards?​

Accepted Answer

A) 0.25 
B) 0.50 
C) 0.75 
D) 1.0 
A) 0.25 
B) 0.50 
C) 0.75 
D) 1.0

Question 12

What is the probability of drawing either a king or a queen from a standard (52-card) deck of playing cards?​

Accepted Answer

A) 0.15 
B) 0.31 
C) 0.50 
D) 0.62 
A) 0.15 
B) 0.31 
C) 0.50 
D) 0.62

Question 13

Directional hypothesis is to nondirectional hypothesis as _____ hypothesis is to _____ hypothesis.

Accepted Answer

A) null; alternative 
B) alternative; null 
C) one-tailed; two-tailed 
D) two-tailed; one-tailed 
A) null; alternative 
B) alternative; null 
C) one-tailed; two-tailed 
D) two-tailed; one-tailed

Question 14

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 700 or higher on the test?​

Accepted Answer

A) 0.98 
B) 0.02 
C) 0.12 
D) 0.75 
A) 0.98 
B) 0.02 
C) 0.12 
D) 0.75

Question 15

When using a _____ hypothesis, the researcher predicts the direction of the expected difference between the groups.

Accepted Answer

A) null 
B) nondirectional 
C) one-tailed 
D) two-tailed 
A) null 
B) nondirectional 
C) one-tailed 
D) two-tailed

Question 16

What is the probability of a couple having three children in the following order: girl, girl, girl?​

Accepted Answer

A) 0.0625 
B) 0.125 
C) 0.25 
D) 0.50 
A) 0.0625 
B) 0.125 
C) 0.25 
D) 0.50

Question 17

What it the probability of two heads in two flips of a coin?​

Accepted Answer

A) 0.25 
B) 0.50 
C) 0.75 
D) 1.0 
A) 0.25 
B) 0.50 
C) 0.75 
D) 1.0

Question 18

What is the probability of getting a 'head' on a single toss of a coin?​

Accepted Answer

A) 1.0 
B) 2.0 
C) 0.50 
D) 0.25 
A) 1.0 
B) 2.0 
C) 0.50 
D) 0.25

Question 19

A researcher hypothesizes that children who learn to read using phonics will read better than those not taught in this manner. Identify I0 and Ha. Is this a one- or two-tailed test?​

Accepted Answer

H₀: There will be no difference in readi

Question 20

Rejecting H0 when we should have failed to reject it is a _____ error.

Accepted Answer

A) Type I 
B) Type II 
C) null 
D) one-tailed 
A) Type I 
B) Type II 
C) null 
D) one-tailed

Probability is

What is the probability of rolling a 3 in a single roll of a die?

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 120 or less pounds?

What is the probability of a couple having two children in the following order: girl, boy?

What is the probability of pulling a heart from a standard (52-card) deck of playing cards?

What is the probability of pulling a jack from a standard (52-card) deck of playing cards?

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 170 or more pounds?

What is the probability of a couple having four children in the following order: girl, girl, girl, boy?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower or 500 or higher on the test?

Imagine that you have a bag filled with 10 pink marbles and 5 black marbles. What is the probability of pulling a black marble from the bag?

What is the probability of drawing either a club or a spade from a standard (52-card) deck of playing cards?

What is the probability of drawing either a king or a queen from a standard (52-card) deck of playing cards?

Directional hypothesis is to nondirectional hypothesis as _ hypothesis is to _ hypothesis.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 700 or higher on the test?

When using a _____ hypothesis, the researcher predicts the direction of the expected difference between the groups.

What is the probability of a couple having three children in the following order: girl, girl, girl?

What it the probability of two heads in two flips of a coin?

What is the probability of getting a 'head' on a single toss of a coin?

A researcher hypothesizes that children who learn to read using phonics will read better than those not taught in this manner. Identify I₀ and H_a. Is this a one- or two-tailed test?

Rejecting H₀ when we should have failed to reject it is a _____ error.

Thinking Like a Scientist

Getting Started

Defining Measuring and Manipulating Variables

Descriptive Methods

Data Organization and Descriptive Statistics

Correlational Methods and Statistics

Introduction to Inferential Statistics

Experimental Design and Analysis I

Experimental Design and Analysis II

Experimental Design and Analysis III

Experimental Design and Analysis Iv

Quasi Experimental and Single Case Designs

Nonparametric Inferential Statistics

APA Communication Guidelines

Filters

Exam 7: Probability and Hypothesis Testing

Probability is

What is the probability of rolling a 3 in a single roll of a die?

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 120 or less pounds?

What is the probability of a couple having two children in the following order: girl, boy?​

What is the probability of pulling a heart from a standard (52-card) deck of playing cards?

What is the probability of pulling a jack from a standard (52-card) deck of playing cards?​

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 170 or more pounds? ​

What is the probability of a couple having four children in the following order: girl, girl, girl, boy?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower or 500 or higher on the test?​

Imagine that you have a bag filled with 10 pink marbles and 5 black marbles. What is the probability of pulling a black marble from the bag?​

What is the probability of drawing either a club or a spade from a standard (52-card) deck of playing cards?​

What is the probability of drawing either a king or a queen from a standard (52-card) deck of playing cards?​

Directional hypothesis is to nondirectional hypothesis as _____ hypothesis is to _____ hypothesis.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 700 or higher on the test?​

When using a _____ hypothesis, the researcher predicts the direction of the expected difference between the groups.

What is the probability of a couple having three children in the following order: girl, girl, girl?​

What it the probability of two heads in two flips of a coin?​

What is the probability of getting a 'head' on a single toss of a coin?​

A researcher hypothesizes that children who learn to read using phonics will read better than those not taught in this manner. Identify I0 and Ha. Is this a one- or two-tailed test?​

Rejecting H0 when we should have failed to reject it is a _____ error.

Thinking Like a Scientist

Getting Started

Defining Measuring and Manipulating Variables

Descriptive Methods

Data Organization and Descriptive Statistics

Correlational Methods and Statistics

Introduction to Inferential Statistics

Experimental Design and Analysis I

Experimental Design and Analysis II

Experimental Design and Analysis III

Experimental Design and Analysis Iv

Quasi Experimental and Single Case Designs

Nonparametric Inferential Statistics

APA Communication Guidelines

Filters

What is the probability of a couple having two children in the following order: girl, boy?

What is the probability of pulling a jack from a standard (52-card) deck of playing cards?

If weight in the general population is normally distributed with an average of 160 pounds and a standard deviation of 20 pounds, what is the probability of selecting someone who weighs 170 or more pounds?

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 400 or lower or 500 or higher on the test?

Imagine that you have a bag filled with 10 pink marbles and 5 black marbles. What is the probability of pulling a black marble from the bag?

What is the probability of drawing either a club or a spade from a standard (52-card) deck of playing cards?

What is the probability of drawing either a king or a queen from a standard (52-card) deck of playing cards?

Directional hypothesis is to nondirectional hypothesis as _ hypothesis is to _ hypothesis.

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of a student scoring 700 or higher on the test?

What is the probability of a couple having three children in the following order: girl, girl, girl?

What it the probability of two heads in two flips of a coin?

What is the probability of getting a 'head' on a single toss of a coin?

A researcher hypothesizes that children who learn to read using phonics will read better than those not taught in this manner. Identify I₀ and H_a. Is this a one- or two-tailed test?

Rejecting H₀ when we should have failed to reject it is a _____ error.