A) cum ƒ B) average frequency C) cum % D) relative frequency A) cum ƒ B) average frequency C) cum % D) relative frequency

Exam 2: Frequency Distributions, Percentiles,

The following scores were obtained by university freshmen on an achievement test in history: (a) Construct a grouped frequency distribution. (b)Convert the frequencies to relative frequencies (use proportions).

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(Short Answer)

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Question 1

Correct Answer:

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range: 54 - 18 = 36
Interval width: 36/10 = 3.6, 36/20 = 1.8, so i = 2 or 3 is okay; we chose i = 3. By making the lower apparent limits a multiple of interval width, we construct the following distributions:

The lowest score is 23 and the highest score is 87. The range is

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Question 2

Correct Answer:

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Convert the following percents to proportions (use the same degree of accuracy): (a)42%, (b)78%, (c)43.7%, (d)5.25%, (e).8%.

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(Short Answer)

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Question 3

Correct Answer:

Verified

(a)42
(b).78
(c).437
(d).0525
(e).008.

Construct a relative frequency distribution (use proportions) from the scores of the above using an interval width of 5 and 15-19 as the lowest interval.

(Short Answer)

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Question 4

The lowest score is 23 and the highest score is 87. Permissible class interval widths are

(Multiple Choice)

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Question 5

Base your answers to the questions on the following distribution: -The score below which 40% of the cases fall is

(Multiple Choice)

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Question 6

The apparent limits of an interval are 30-34. The width of the interval is

(Multiple Choice)

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Question 7

If measurement is to the nearest 10 lb, then a score of 540 lb means

(Multiple Choice)

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Question 8

Convert the following proportions to percents (report the percent to the same degree of accuracy as the proportion): (a)26, (b).05, (c).79, (d).555, (e).005.

(Short Answer)

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Question 9

Base your answers to the questions on the following distribution: -The cum ƒ value of 8 means that 8 cases fall below

(Multiple Choice)

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Question 10

For each of the following intervals, give (1) the interval width, (2) the real limits of the interval, and (3) the apparent limits and real limits of the next higher interval (assume the scores are rounded to the nearest whole number or decimal place indicated unless otherwise specified): (a)10-14, (b)20-39, (c)2.50-2.74, (d)1.0-1.9, (e)30-40 (accurate to the nearest 10).

(Short Answer)

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Question 11

Which one, if any, of the first three alternatives is impossible?

(Multiple Choice)

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Question 12

The lowest and highest scores are given below for different sets of scores. In each case, the scores are to be grouped into class intervals. For each, give (1) the range, (2) your choice of class interval width, (3) the score limits for the lowest interval, and (4) the score limits for the highest interval (do this directly without listing any of the intervals between the lowest and the highest): a) 36, 62, b) 27, 101, c) 56, 69, d) 187, 821, e) 6.3, 21.9, f) 1.27, 3.47.

(Short Answer)

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Question 13

John uses our guidelines to arrive at an interval size of 30. Which of the following is the most likely value for the range of scores in his sample?

(Multiple Choice)

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Question 14

Base your answers to the questions on the following distribution: -The percentile rank of a score of 54.5 is

(Multiple Choice)

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Question 15

Construct a cumulative percentage distribution for the following data:

(Short Answer)

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Question 16

ƒ/n gives us:

(Multiple Choice)

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Question 17

Which one, if any, of the first three alternatives is impossible?

(Multiple Choice)

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Question 18

Base your answers to the questions on the following distribution: -There are 16 scores falling below

(Multiple Choice)

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Question 19

Base your answers to the questions on the following distribution: -P₁₀ is

(Multiple Choice)

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Question 20

Showing 1 - 20 of 34

The following scores were obtained by university freshmen on an achievement test in history: (a) Construct a grouped frequency distribution. (b)Convert the frequencies to relative frequencies (use proportions).

The lowest score is 23 and the highest score is 87. The range is

Convert the following percents to proportions (use the same degree of accuracy): (a)42%, (b)78%, (c)43.7%, (d)5.25%, (e).8%.

Construct a relative frequency distribution (use proportions) from the scores of the above using an interval width of 5 and 15-19 as the lowest interval.

The lowest score is 23 and the highest score is 87. Permissible class interval widths are

Base your answers to the questions on the following distribution: -The score below which 40% of the cases fall is

The apparent limits of an interval are 30-34. The width of the interval is

If measurement is to the nearest 10 lb, then a score of 540 lb means

Convert the following proportions to percents (report the percent to the same degree of accuracy as the proportion): (a)26, (b).05, (c).79, (d).555, (e).005.

Base your answers to the questions on the following distribution: -The cum ƒ value of 8 means that 8 cases fall below

Which one, if any, of the first three alternatives is impossible?

John uses our guidelines to arrive at an interval size of 30. Which of the following is the most likely value for the range of scores in his sample?

Base your answers to the questions on the following distribution: -The percentile rank of a score of 54.5 is

Construct a cumulative percentage distribution for the following data:

ƒ/n gives us:

Which one, if any, of the first three alternatives is impossible?

Base your answers to the questions on the following distribution: -There are 16 scores falling below

Base your answers to the questions on the following distribution: -P₁₀ is

Introduction

Graphic Representation of Frequency Distributions

Central Tendency

Variability and Standard Z Scores

Standard Scores and the Normal Curve

Correlation

Prediction

Interpretive Aspects of Correlation and Regression

Probability

Random Sampling and Sampling Distributions

Introduction to Statistical Inference: Testing Hypotheses About Single Means Z and T

Interpreting the Results of Hypothesis Testing: Effect Size, Type I and Type II Errors, and Power

Testing Hypotheses About the Difference Between Two Independent Groups

Testing for a Difference

Inference About Correlation Coefficients

An Alternative to Hypothesis Testing: Confidence Intervals

Testing for Differences Among Three or More Groups: One-Way Analysis of Variance and Some Alternatives

Factorial Analysis of Variance

Chi-Square and Inference About Frequencies

Some Almost Assumption-Free Tests

Filters

Exam 2: Frequency Distributions, Percentiles,

The following scores were obtained by university freshmen on an achievement test in history: (a) Construct a grouped frequency distribution. (b)Convert the frequencies to relative frequencies (use proportions).

The lowest score is 23 and the highest score is 87. The range is

Convert the following percents to proportions (use the same degree of accuracy): (a)42%, (b)78%, (c)43.7%, (d)5.25%, (e).8%.

Construct a relative frequency distribution (use proportions) from the scores of the above using an interval width of 5 and 15-19 as the lowest interval.

The lowest score is 23 and the highest score is 87. Permissible class interval widths are

Base your answers to the questions on the following distribution: -The score below which 40% of the cases fall is

The apparent limits of an interval are 30-34. The width of the interval is

If measurement is to the nearest 10 lb, then a score of 540 lb means

Convert the following proportions to percents (report the percent to the same degree of accuracy as the proportion): (a)26, (b).05, (c).79, (d).555, (e).005.

Base your answers to the questions on the following distribution: -The cum ƒ value of 8 means that 8 cases fall below

Which one, if any, of the first three alternatives is impossible?

John uses our guidelines to arrive at an interval size of 30. Which of the following is the most likely value for the range of scores in his sample?

Base your answers to the questions on the following distribution: -The percentile rank of a score of 54.5 is

Construct a cumulative percentage distribution for the following data:

ƒ/n gives us:

Which one, if any, of the first three alternatives is impossible?

Base your answers to the questions on the following distribution: -There are 16 scores falling below

Base your answers to the questions on the following distribution: -P10 is

Introduction

Graphic Representation of Frequency Distributions

Central Tendency

Variability and Standard Z Scores

Standard Scores and the Normal Curve

Correlation

Prediction

Interpretive Aspects of Correlation and Regression

Probability

Random Sampling and Sampling Distributions

Introduction to Statistical Inference: Testing Hypotheses About Single Means Z and T

Interpreting the Results of Hypothesis Testing: Effect Size, Type I and Type II Errors, and Power

Testing Hypotheses About the Difference Between Two Independent Groups

Testing for a Difference

Inference About Correlation Coefficients

An Alternative to Hypothesis Testing: Confidence Intervals

Testing for Differences Among Three or More Groups: One-Way Analysis of Variance and Some Alternatives

Factorial Analysis of Variance

Chi-Square and Inference About Frequencies

Some Almost Assumption-Free Tests

Filters

Base your answers to the questions on the following distribution: -P₁₀ is