Exam 3: Some Key Ingredients for Inferential Statistics: Z Scores,the Normal Curve, Sample Versus Population, and Probability

On a test of marital intimacy,husbands' scores are normally distributed with a mean of 140 and a standard deviation of 25. a.Using the normal curve approximation rules,approximately what percentages of husbands have scores above 190,below 165,and below 115? b.Illustrate your answer with a sketch. c.Explain your answers to a person who is familiar with mean,standard deviation,and Z scores,but not with normal curve percentages.

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Question 1

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A)Z = 2,so 2%; Z = 1,so 84%; Z = -1,so 16% B)Not answered. C)Not answered.

Using the percentage approximations for the normal curve,the percentage of scores between the mean and one standard deviation below the mean is

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Question 2

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In a distribution of Z scores,the mean is always

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Question 3

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When discussing a population,the symbol for the mean is ,and the symbol for the standard deviation is .

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Question 4

The understanding of probability as the degree of certainty that a particular outcome will occur is the __________ interpretation of probability.

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Question 5

If the mean score on a stress scale is 5,the standard deviation is 2,and the distribution is normal,the percentage of people who would obtain scores between 5 and 9 is

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Question 6

Using a normal curve table,if a person received a test score that is in the top 32% of all test scores,the person's Z score must be at least

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Question 7

If the mean score on a creativity test is 20,the standard deviation is 5,and the distribution is normal,the percentage of people who would obtain scores between 15 and 25 is

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Question 8

In a housing project there are 350 households in which English is spoken,50 in which Spanish is spoken,and 100 in which the language is other than English or Spanish.If a psychologist approaches a house at random to conduct an interview,the chance that the language in that household will NOT be English is

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Question 9

If the mean of a test is 13 and its standard deviation is 3,the Z score for a person with a raw score of 7 is

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Question 10

A developmental psychologist was interested in how long it would take a particular 7-year-old child to complete three different aptitude tests as compared with 7-year-olds in the general population.The child's time for reading was 31 minutes (population: M = 29,SD = 4).For math,it was 26 minutes (population: M = 32,SD = 2).For science,it was 40 minutes (population: M = 31,SD = 4). a.Calculate the child's Z scores for each of the aptitude tests. b.Which aptitude test(s)took the child substantially more time to complete as compared with other 7-year-olds? c.Which aptitude test(s)took the child substantially less time to complete as compared with other 7-year-olds? d.Explain your answers to someone who has never had a course in statistics.

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Question 11

The understanding of probability as the proportion of a particular outcome that will be obtained if an experiment is repeated many times is the __________ interpretation of probability.

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Question 12

The larger group to which a researcher makes inferences based on the particular group of participants studied is a(n)__________.

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Question 13

The mean,standard deviation,and variance of a sample are called sample __________.

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Question 14

The traditional view about the normal curve in psychology is that normal curves are

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Question 15

The length of conversations between supervisors and workers in a certain manufacturing industry is normally distributed with a mean of 4.0 minutes and a standard deviation of 0.8 minutes. a.Use the normal curve table to determine the percentage of conversations that are longer than 4.4 minutes,longer than 5 minutes,longer than 3 minutes,and shorter than 2 minutes. b.Illustrate your answer with a sketch. c.Explain your answers to a person who is familiar with mean,standard deviation,and Z scores,but not with normal curve percentages.

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Question 16

The formula for changing a Z score to a raw score is __________.

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Question 17

The probability rule that applies when figuring the probability of getting both of two independent outcomes is the

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Question 18

Using a normal curve table,if a person has a music aptitude score of 41,which equals a Z score of 1.3,the percentage of people having a higher score is

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Question 19

In a standardized distribution,the mean is always and the standard deviation is always .

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Question 20

Showing 1 - 20 of 73

Using the percentage approximations for the normal curve,the percentage of scores between the mean and one standard deviation below the mean is

In a distribution of Z scores,the mean is always

When discussing a population,the symbol for the mean is ,and the symbol for the standard deviation is .

The understanding of probability as the degree of certainty that a particular outcome will occur is the __________ interpretation of probability.

If the mean score on a stress scale is 5,the standard deviation is 2,and the distribution is normal,the percentage of people who would obtain scores between 5 and 9 is

Using a normal curve table,if a person received a test score that is in the top 32% of all test scores,the person's Z score must be at least

If the mean score on a creativity test is 20,the standard deviation is 5,and the distribution is normal,the percentage of people who would obtain scores between 15 and 25 is

If the mean of a test is 13 and its standard deviation is 3,the Z score for a person with a raw score of 7 is

The understanding of probability as the proportion of a particular outcome that will be obtained if an experiment is repeated many times is the __________ interpretation of probability.

The larger group to which a researcher makes inferences based on the particular group of participants studied is a(n)__________.

The mean,standard deviation,and variance of a sample are called sample __________.

The traditional view about the normal curve in psychology is that normal curves are

The formula for changing a Z score to a raw score is __________.

The probability rule that applies when figuring the probability of getting both of two independent outcomes is the

Using a normal curve table,if a person has a music aptitude score of 41,which equals a Z score of 1.3,the percentage of people having a higher score is

In a standardized distribution,the mean is always and the standard deviation is always .

Displaying the Order in a Group of Numbers

Central Tendency and Variability

Introduction to Hypothesis Testing

Hypothesis Tests With Means of Samples

Making Sense of Statistical Significance:decision Errors, Effect Size, and Statistical Power

Introduction to T Tests: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Factorial Analysis of Variance

Correlation

Prediction

Chi-Square Tests

Strategies When Population Distributions Are Not Normal: Data Transformations and Rank-Order Tests

The General Linear Model and Making Sense of Advanced Statistical Procedures in Research Articles

Filters

Exam 3: Some Key Ingredients for Inferential Statistics: Z Scores,the Normal Curve, Sample Versus Population, and Probability

Using the percentage approximations for the normal curve,the percentage of scores between the mean and one standard deviation below the mean is

In a distribution of Z scores,the mean is always

When discussing a population,the symbol for the mean is __________,and the symbol for the standard deviation is __________.

The understanding of probability as the degree of certainty that a particular outcome will occur is the __________ interpretation of probability.

If the mean score on a stress scale is 5,the standard deviation is 2,and the distribution is normal,the percentage of people who would obtain scores between 5 and 9 is

Using a normal curve table,if a person received a test score that is in the top 32% of all test scores,the person's Z score must be at least

If the mean score on a creativity test is 20,the standard deviation is 5,and the distribution is normal,the percentage of people who would obtain scores between 15 and 25 is

If the mean of a test is 13 and its standard deviation is 3,the Z score for a person with a raw score of 7 is

The understanding of probability as the proportion of a particular outcome that will be obtained if an experiment is repeated many times is the __________ interpretation of probability.

The larger group to which a researcher makes inferences based on the particular group of participants studied is a(n)__________.

The mean,standard deviation,and variance of a sample are called sample __________.

The traditional view about the normal curve in psychology is that normal curves are

The formula for changing a Z score to a raw score is __________.

The probability rule that applies when figuring the probability of getting both of two independent outcomes is the

Using a normal curve table,if a person has a music aptitude score of 41,which equals a Z score of 1.3,the percentage of people having a higher score is

In a standardized distribution,the mean is always __________ and the standard deviation is always __________.

Displaying the Order in a Group of Numbers

Central Tendency and Variability

Introduction to Hypothesis Testing

Hypothesis Tests With Means of Samples

Making Sense of Statistical Significance:decision Errors, Effect Size, and Statistical Power

Introduction to T Tests: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Factorial Analysis of Variance

Correlation

Prediction

Chi-Square Tests

Strategies When Population Distributions Are Not Normal: Data Transformations and Rank-Order Tests

The General Linear Model and Making Sense of Advanced Statistical Procedures in Research Articles

Filters

When discussing a population,the symbol for the mean is ,and the symbol for the standard deviation is .

In a standardized distribution,the mean is always and the standard deviation is always .