Exam 3: Descriptive Statistics: Numerical Methods

The rate of return for each of the past four years on a market fund are R₁ = 2.4%,R₂ = 1.0%,R₃ = -3.2%,and R₄ = 0.5%.Find the geometric mean rate of return.

(Short Answer)

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Question 81

An initial investment of $10,000 has a value of $7,382 at the end of year 1.What is the rate of return for the first year?

(Short Answer)

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Question 82

In an analysis of the relationship between the average weekly temperature in a major city and the per person consumption of ice cream (pints),a least squares line is defined by the equation 5.72 + .004x.Predict the average amount of ice cream consumed when it is 50 degrees outside.

(Short Answer)

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Question 83

The company financial officer was interested in the average cost of PCs that had been purchased in the past six months.She took a random sample of the price of 10 computers,with the following results. $3,250,$1,127,$2,995,$3,250,$3,445,$3,449,$1,482,$6,120,$3,009,$4,000 What are the lower and upper limits?

(Multiple Choice)

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Question 84

Find the z-score for an IQ test score of 118 when the mean is 100 and the standard deviation is 15.

(Multiple Choice)

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Question 85

Researchers wish to study fuel consumption rates based on speed.The data from the test car at 10 speeds are below: It can be shown that for these data: Calculate the sample covariance.

(Multiple Choice)

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Question 86

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are (mean = 70): 68,67,70,71,68,75,68,62,80,73,68. What is the range?

(Multiple Choice)

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Question 87

Z-score is often used as a measure of risk.

(True/False)

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Question 88

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are: 68,67,70,71,68,75,68,62,80,73,68. What is the median?

(Multiple Choice)

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Question 89

It is appropriate to use the Empirical Rule to describe a population that is extremely skewed.

(True/False)

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Question 90

In a statistics class,10 scores were randomly selected with the following results (mean = 71.5): 74,73,77,77,71,68,65,77,67,66 What is the variance?

(Multiple Choice)

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Question 91

Compute the sample standard deviation of the data set 6,4,2,1,4,1.

(Multiple Choice)

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Question 92

The mode is the measurement in a sample or population that occurs most frequently.

(True/False)

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Question 93

Compute the population variance of these data: 16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14.

(Multiple Choice)

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Question 94

The following table shows the Price-to-Earnings ratio for a stereo equipment manufacturing company between 1998 and 2002.The annual percentage growth rate of the P/E ratios is also calculated and given below. Calculate the geometric mean growth rate increase or decrease over the period from 1998 to 2002.

(Multiple Choice)

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Question 95

The average lateness for one of the top airline companies is 10 minutes.The variance of the lateness measure is calculated as 9.An airplane arrived 13 minutes after the stated arrival time.Calculate the z-score for the lateness of this particular airplane.

(Multiple Choice)

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Question 96

Which percentile describes the third quartile,Q3?

(Multiple Choice)

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Question 97

If the mean is greater than the median,then the distribution is ___________.

(Multiple Choice)

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Question 98

According to a survey of the top 10 employers in a major city in the Midwest,a worker spends an average of 413 minutes a day on the job.Suppose the standard deviation is 26.8 minutes,and the time spent is approximately a normal distribution. What are the times within which approximately 68.26 percent of all workers will fall?

(Multiple Choice)

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Question 99

If the median of a data set is 760,the upper quartile is 950,and the lower quartile is 650,what is the interquartile range?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 141

The rate of return for each of the past four years on a market fund are R₁ = 2.4%,R₂ = 1.0%,R₃ = -3.2%,and R₄ = 0.5%.Find the geometric mean rate of return.

An initial investment of $10,000 has a value of $7,382 at the end of year 1.What is the rate of return for the first year?

In an analysis of the relationship between the average weekly temperature in a major city and the per person consumption of ice cream (pints),a least squares line is defined by the equation 5.72 + .004x.Predict the average amount of ice cream consumed when it is 50 degrees outside.

Find the z-score for an IQ test score of 118 when the mean is 100 and the standard deviation is 15.

Researchers wish to study fuel consumption rates based on speed.The data from the test car at 10 speeds are below: It can be shown that for these data: Calculate the sample covariance.

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are (mean = 70): 68,67,70,71,68,75,68,62,80,73,68. What is the range?

Z-score is often used as a measure of risk.

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are: 68,67,70,71,68,75,68,62,80,73,68. What is the median?

It is appropriate to use the Empirical Rule to describe a population that is extremely skewed.

In a statistics class,10 scores were randomly selected with the following results (mean = 71.5): 74,73,77,77,71,68,65,77,67,66 What is the variance?

Compute the sample standard deviation of the data set 6,4,2,1,4,1.

The mode is the measurement in a sample or population that occurs most frequently.

Compute the population variance of these data: 16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14.

The average lateness for one of the top airline companies is 10 minutes.The variance of the lateness measure is calculated as 9.An airplane arrived 13 minutes after the stated arrival time.Calculate the z-score for the lateness of this particular airplane.

Which percentile describes the third quartile,Q3?

If the mean is greater than the median,then the distribution is ___________.

If the median of a data set is 760,the upper quartile is 950,and the lower quartile is 650,what is the interquartile range?

An Introduction to Business Statistics

Descriptive Statistics: Tabular and Graphical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Process Improvement Using Control Charts

Filters

Exam 3: Descriptive Statistics: Numerical Methods

The rate of return for each of the past four years on a market fund are R1 = 2.4%,R2 = 1.0%,R3 = -3.2%,and R4 = 0.5%.Find the geometric mean rate of return.

An initial investment of $10,000 has a value of $7,382 at the end of year 1.What is the rate of return for the first year?

In an analysis of the relationship between the average weekly temperature in a major city and the per person consumption of ice cream (pints),a least squares line is defined by the equation 5.72 + .004x.Predict the average amount of ice cream consumed when it is 50 degrees outside.

Find the z-score for an IQ test score of 118 when the mean is 100 and the standard deviation is 15.

Researchers wish to study fuel consumption rates based on speed.The data from the test car at 10 speeds are below: It can be shown that for these data: Calculate the sample covariance.

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are (mean = 70): 68,67,70,71,68,75,68,62,80,73,68. What is the range?

Z-score is often used as a measure of risk.

In a hearing test,subjects estimate the loudness (in decibels)of a sound,and the results are: 68,67,70,71,68,75,68,62,80,73,68. What is the median?

It is appropriate to use the Empirical Rule to describe a population that is extremely skewed.

In a statistics class,10 scores were randomly selected with the following results (mean = 71.5): 74,73,77,77,71,68,65,77,67,66 What is the variance?

Compute the sample standard deviation of the data set 6,4,2,1,4,1.

The mode is the measurement in a sample or population that occurs most frequently.

Compute the population variance of these data: 16,18,23,21,17,16,24,23,9,17,11,16,22,10,15,14.

The average lateness for one of the top airline companies is 10 minutes.The variance of the lateness measure is calculated as 9.An airplane arrived 13 minutes after the stated arrival time.Calculate the z-score for the lateness of this particular airplane.

Which percentile describes the third quartile,Q3?

If the mean is greater than the median,then the distribution is ___________.

If the median of a data set is 760,the upper quartile is 950,and the lower quartile is 650,what is the interquartile range?

An Introduction to Business Statistics

Descriptive Statistics: Tabular and Graphical Methods

Probability

Discrete Random Variables

Continuous Random Variables

Sampling and Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Process Improvement Using Control Charts

Filters

The rate of return for each of the past four years on a market fund are R₁ = 2.4%,R₂ = 1.0%,R₃ = -3.2%,and R₄ = 0.5%.Find the geometric mean rate of return.