Exam 4: Percentiles percentile Ranks standard Scores and the Normal Distribution

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.If Jeff has a standard score of -1.5 how many hours does he sleep?

(Multiple Choice)

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Question 61

Why are standard scores more meaningful when they occur in a normal distribution?

(Essay)

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Question 62

A standard score in a normal distribution is referred to as a z score.

(True/False)

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Question 63

In a frequency distribution,the term designating the score corresponding to the 50th percentile is known as the _____.

(Multiple Choice)

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Question 64

Standardization _____ the central tendency and variability of the scores.

(Multiple Choice)

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Question 65

The score value corresponding to a given percentile rank is referred to as a(n)_____.

(Multiple Choice)

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Question 66

Gary is told that his percentile rank on the law school admissions exam is 87.This indicates that 87% of students taking this exam scored _____ Gary.

(Multiple Choice)

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Question 67

Given an approximately normal distribution of test scores with µ = 75,ó = 25,what test (raw)score would correspond to a z score of 1.5?

(Multiple Choice)

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Question 68

Assume you have a normal distribution with a mean of 5 and a standard deviation of 2.What proportion of scores fall between the raw scores of 7 and 9?

(Multiple Choice)

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Question 69

Based on the Applications to the Analysis of Social Problems section of Chapter 4,the formula referred to in question 1 above would most likely be used with

(Multiple Choice)

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Question 70

The sum of a set of standard scores equals

(Multiple Choice)

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Question 71

Average family watches 40 hours of TV a week and the SD is 4.Jane says she watches about 28 hours of TV a week and her variance is 4.What is her Standard score?

(Multiple Choice)

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Question 72

Jack told his mom that he was 1.2 standard units above the mean in his math class.What is his original score if the class mean was 78 and the SD=3?

(Short Answer)

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Question 73

In a normal distribution,approximately _____ of all scores fall between the standard scores of -1 and +1.

(Multiple Choice)

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Question 74

All normal distributions are _____ in nature.

(Multiple Choice)

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Question 75

The percentage of scores in the distribution that occur at or below a given value,X,is the percentile of that value.

(True/False)

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Question 76

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85, S² = 36.What is Ronald's approximate percentile rank?

(Multiple Choice)

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Question 77

In most normal distributions,the mean,the median,and the mode are different from each other.

(True/False)

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Question 78

What proportion of scores in a normal distribution are between z = -1.75 and z = -2.75?

(Multiple Choice)

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Question 79

A psychologist is interested in how well people can remember words that they had previously seen.He gives them a list of 70 words,but does not tell them they will be tested later.One week later the students are given a list of 140 words,and told to choose the ones they had seen the previous week.Below is the grouped distribution of the number of words remembered by the subjects. What is the percentile rank of a score of 47?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 176

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.If Jeff has a standard score of -1.5 how many hours does he sleep?

Why are standard scores more meaningful when they occur in a normal distribution?

A standard score in a normal distribution is referred to as a z score.

In a frequency distribution,the term designating the score corresponding to the 50th percentile is known as the _____.

Standardization _____ the central tendency and variability of the scores.

The score value corresponding to a given percentile rank is referred to as a(n)_____.

Gary is told that his percentile rank on the law school admissions exam is 87.This indicates that 87% of students taking this exam scored _____ Gary.

Given an approximately normal distribution of test scores with µ = 75,ó = 25,what test (raw)score would correspond to a z score of 1.5?

Assume you have a normal distribution with a mean of 5 and a standard deviation of 2.What proportion of scores fall between the raw scores of 7 and 9?

Based on the Applications to the Analysis of Social Problems section of Chapter 4,the formula referred to in question 1 above would most likely be used with

The sum of a set of standard scores equals

Average family watches 40 hours of TV a week and the SD is 4.Jane says she watches about 28 hours of TV a week and her variance is 4.What is her Standard score?

Jack told his mom that he was 1.2 standard units above the mean in his math class.What is his original score if the class mean was 78 and the SD=3?

In a normal distribution,approximately _____ of all scores fall between the standard scores of -1 and +1.

All normal distributions are _____ in nature.

The percentage of scores in the distribution that occur at or below a given value,X,is the percentile of that value.

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85, S² = 36.What is Ronald's approximate percentile rank?

In most normal distributions,the mean,the median,and the mode are different from each other.

What proportion of scores in a normal distribution are between z = -1.75 and z = -2.75?

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Pearson Correlation and Regression: Descriptive Aspects

Measures of Central Tendency and Variability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Probability

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Independent Groups T -Test

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

Exam 4: Percentiles percentile Ranks standard Scores and the Normal Distribution

On average a person sleeps 6 hours a day with a standard deviation of 1 hour.If Jeff has a standard score of -1.5 how many hours does he sleep?

Why are standard scores more meaningful when they occur in a normal distribution?

A standard score in a normal distribution is referred to as a z score.

In a frequency distribution,the term designating the score corresponding to the 50th percentile is known as the _____.

Standardization _____ the central tendency and variability of the scores.

The score value corresponding to a given percentile rank is referred to as a(n)_____.

Gary is told that his percentile rank on the law school admissions exam is 87.This indicates that 87% of students taking this exam scored _____ Gary.

Given an approximately normal distribution of test scores with µ = 75,ó = 25,what test (raw)score would correspond to a z score of 1.5?

Assume you have a normal distribution with a mean of 5 and a standard deviation of 2.What proportion of scores fall between the raw scores of 7 and 9?

Based on the Applications to the Analysis of Social Problems section of Chapter 4,the formula referred to in question 1 above would most likely be used with

The sum of a set of standard scores equals

Average family watches 40 hours of TV a week and the SD is 4.Jane says she watches about 28 hours of TV a week and her variance is 4.What is her Standard score?

Jack told his mom that he was 1.2 standard units above the mean in his math class.What is his original score if the class mean was 78 and the SD=3?

In a normal distribution,approximately _____ of all scores fall between the standard scores of -1 and +1.

All normal distributions are _____ in nature.

The percentage of scores in the distribution that occur at or below a given value,X,is the percentile of that value.

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85, S2 = 36.What is Ronald's approximate percentile rank?

In most normal distributions,the mean,the median,and the mode are different from each other.

What proportion of scores in a normal distribution are between z = -1.75 and z = -2.75?

Introduction and Mathematical Preliminaries

Frequency and Probability Distributions

Pearson Correlation and Regression: Descriptive Aspects

Measures of Central Tendency and Variability

Estimation and Sampling Distributions

Hypothesis Testing: Inferences About a Single Mean

Probability

Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships

Independent Groups T -Test

Correlated Groups T-Test

One-Way Repeated Measures Analysis of Variance

Pearson Correlation and Regression: Inferential Aspects

Chi-Square Test

Nonparametric Statistics

Two-Way Between-Subjects Analysis of Variance

Overview and Extension: Statistical Tests for More Complex Designs

Filters

An instructor has given his final exam,and scores are approximately normally distributed.Nancy scores a 90 and Ronald scores a 75.The characteristics of the distribution are as follows: = 85, S² = 36.What is Ronald's approximate percentile rank?