Question 1

If a curve is symmetrical, _________.

Accepted Answer

A)  most of the scores fall at the lower values of the X axis 
B)  most of the scores fall at the higher values of the X axis 
C)  if folded in half, the two sides of the curve coincide 
D)  most of the scores fall at the higher values of the Y axis 
A)  most of the scores fall at the lower values of the X axis 
B)  most of the scores fall at the higher values of the X axis 
C)  if folded in half, the two sides of the curve coincide 
D)  most of the scores fall at the higher values of the Y axis

Question 2

Stem and leaf diagrams are like histograms, except that they lose the original scores.

Accepted Answer

A) True 
 B)False

Question 3

In constructing a frequency distribution of grouped scores, the intervals must be continuous and mutually exclusive.

Accepted Answer

A) True 
 B)False

Question 4

For the frequency distribution shown in the following table, = 25.

Accepted Answer

A) True 
 B)False

Question 5

What is the range of the distribution in problem 23?

Accepted Answer

As an AI, I don't have access to externa

Question 6

A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. The resulting data are shown in the following frequency distribution.   The percentile rank of a score of 40 is _________.

Accepted Answer

A)  16.33% 
B)  16.00% 
C)  9.67% 
D)  16.67% 
A)  16.33% 
B)  16.00% 
C)  9.67% 
D)  16.67%

Question 7

To determine the width of the class interval, i, divide the range by the number of class intervals.

Accepted Answer

A) True 
 B)False

Question 8

Your new Mercedes weighs 1850 kilograms when measured to the nearest kilogram. The real limits of its weight are _________.

Accepted Answer

A)  1800-1900 
B)  1840-1860 
C)  1849-1851 
D)  1849.5-1850.5 
A)  1800-1900 
B)  1840-1860 
C)  1849-1851 
D)  1849.5-1850.5

Question 9

A cumulative frequency distribution indicates the number of scores which fell below the upper real limit of each interval.

Accepted Answer

A) True 
 B)False

Question 10

When individual scores are combined into groups, _________.

Accepted Answer

A)  information is lost 
B)  data is added 
C)  a meaningful visual display can result depending on the interval width 
D)  information is lost and data is added 
A)  information is lost 
B)  data is added 
C)  a meaningful visual display can result depending on the interval width 
D)  information is lost and data is added

Question 11

A relative frequency distribution indicates the total number of scores which occurred in each interval.

Accepted Answer

A) True 
 B)False

Question 12

What indicates the proportion of the total number of scores that occurred in each interval?

Accepted Answer

A)  relative frequency distribution 
B)  cumulative frequency distribution 
C)  cumulative percentage distribution 
D)  none of these 
A)  relative frequency distribution 
B)  cumulative frequency distribution 
C)  cumulative percentage distribution 
D)  none of these

Question 13

Given the distribution of grouped scores shown in the following table.   What is the value of i ?

Accepted Answer

A)  10 
B)  9 
C)  9.5 
D)  10.5 
A)  10 
B)  9 
C)  9.5 
D)  10.5

Question 14

Define frequency polygon.

Accepted Answer

A frequency polygon is a graphical repre

Question 15

Define positively skewed curve.

Accepted Answer

A positively skewed curve, also known as

Question 16

Draw a graph to represent each of the following:

Accepted Answer

The answer of Draw a graph to represent each of...

Question 17

A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. Here is the frequency distribution of the data.   The real limits of the interval 56-65 are _________.

Accepted Answer

A)  56.5-65.5 
B)  55.5-65.5 
C)  55-67 
D)  56-65 
A)  56.5-65.5 
B)  55.5-65.5 
C)  55-67 
D)  56-65

Question 18

A distribution which has a predominance of scores at the lower values of the distribution and which tails off at the higher end is _______.

Accepted Answer

A)  positively skewed 
B)  negatively skewed 
C)  normally distributed 
D)  symmetrical 
A)  positively skewed 
B)  negatively skewed 
C)  normally distributed 
D)  symmetrical

Question 19

The percentile rank of a score is equal to the percentage of scores in the distribution that fall below the score in question.

Accepted Answer

A) True 
 B)False

Question 20

In a frequency polygon the points are plotted over _______ at a height corresponding to the frequency of the interval.

Accepted Answer

A)  the midpoint of each interval 
B)  the lower real limit 
C)  the upper real limit 
D)  none of these 
A)  the midpoint of each interval 
B)  the lower real limit 
C)  the upper real limit 
D)  none of these

If a curve is symmetrical, _________.

Stem and leaf diagrams are like histograms, except that they lose the original scores.

In constructing a frequency distribution of grouped scores, the intervals must be continuous and mutually exclusive.

For the frequency distribution shown in the following table, = 25.

What is the range of the distribution in problem 23?

To determine the width of the class interval, i, divide the range by the number of class intervals.

Your new Mercedes weighs 1850 kilograms when measured to the nearest kilogram. The real limits of its weight are _________.

A cumulative frequency distribution indicates the number of scores which fell below the upper real limit of each interval.

When individual scores are combined into groups, _________.

A relative frequency distribution indicates the total number of scores which occurred in each interval.

What indicates the proportion of the total number of scores that occurred in each interval?

Given the distribution of grouped scores shown in the following table. What is the value of i ?

Define frequency polygon.

Define positively skewed curve.

Draw a graph to represent each of the following:

A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. Here is the frequency distribution of the data. The real limits of the interval 56-65 are _________.

A distribution which has a predominance of scores at the lower values of the distribution and which tails off at the higher end is _______.

The percentile rank of a score is equal to the percentage of scores in the distribution that fall below the score in question.

In a frequency polygon the points are plotted over _______ at a height corresponding to the frequency of the interval.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

Exam 3: Frequency Distributions

If a curve is symmetrical, _________.

Stem and leaf diagrams are like histograms, except that they lose the original scores.

In constructing a frequency distribution of grouped scores, the intervals must be continuous and mutually exclusive.

For the frequency distribution shown in the following table, = 25.

What is the range of the distribution in problem 23?

To determine the width of the class interval, i, divide the range by the number of class intervals.

Your new Mercedes weighs 1850 kilograms when measured to the nearest kilogram. The real limits of its weight are _________.

A cumulative frequency distribution indicates the number of scores which fell below the upper real limit of each interval.

When individual scores are combined into groups, _________.

A relative frequency distribution indicates the total number of scores which occurred in each interval.

What indicates the proportion of the total number of scores that occurred in each interval?

Given the distribution of grouped scores shown in the following table. What is the value of i ?

Define frequency polygon.

Define positively skewed curve.

Draw a graph to represent each of the following:

A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. Here is the frequency distribution of the data. The real limits of the interval 56-65 are _________.

A distribution which has a predominance of scores at the lower values of the distribution and which tails off at the higher end is _______.

The percentile rank of a score is equal to the percentage of scores in the distribution that fall below the score in question.

In a frequency polygon the points are plotted over _______ at a height corresponding to the frequency of the interval.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters