STAT TECH IN BUSINESS & ECON AC
18th Edition
ISBN: 9781264731657
Author: Lind
Publisher: MCG
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Chapter 3, Problem 44E
a.
To determine
Find the arithmetic mean return.
b.
To determine
Find the variance.
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To analyze the risk, or volatility, associated with investing in General Electric common stock, consider a sample of the eight quarterly percent
total returns. The percent total return includes the stock price change plus the dividend payment for the quarter.
Excel File: data11-06.xlsx
20.0 -20.5 12.2 12.6 10.5 -5.8 -18.7 15.3
a. What is the value of the sample mean (to 1 decimal)?
What is its interpretation?
This is the estimate of the-Select your answer-mean percent total return per quarter for General Electric.
b. Compute the sample variance and sample standard deviation as measures of volatility for the quarterly return for General Electric (to 2
decimals).
Variance:
Standard deviation:
c. Construct a 95% confidence interval for the population variance (to 2 decimals). Use Table 11.1.
sots
d. Construct a 95% confidence interval for the population standard deviation (to 2 decimals). Use Table 11.1.
sos
ReadSpeaker
To analyze the risk, or volatility, associated with investing in General Electric common stock, consider a sample of the eight quarterly percent total returns. The percent total return includes the stock price change plus the dividend
payment for the quarter.
Excel File: data11-06.xlsx
20.0
-20,5
12.2
12.6
10.5
-5.8
-18.7
15.3
a. What is the value of the sample mean (to 1 decimal)?
What is its interpretation?
This is the estimate of the
Select your answer
v mean percent total return per quarter for General Electric.
b. Compute the sample variance and sample standard deviation as measures of volatility for the quarterly return for General Electric (to 2 decimals).
Variance:
Standard deviation:
c. Construct a 95% confidence interval for the population variance (to 2 decimals). Use Table 11.1.
d. Construct a 95% confidence interval for the population standard deviation (to 2 decimals). Use Table 11.1.
The Seneca Children’s Fund (SCF) is a local charity that runs a summer camp for disadvantaged children. The fund’s board of directors has been working very hard over recent years to decrease the amount of overhead expenses, a major factor in how charities are rated by independent agencies. The following data show the percentage of the money SCF has raised that was spent on administrative and fund-raising expenses over the past seven years:
Year
Period (t)
Expense (%)
2003
1
13.9
2004
2
12.2
2005
3
10.5
2006
4
10.4
2007
5
11.5
2008
6
10.0
2009
7
8.5
a. Construct a time series plot. What type of pattern exists in the data?b. Use simple linear regression analysis to find the parameters for the line that minimizes MSE for this time series.c. Forecast the percentage of administrative expenses for year 8.d. If SCF can maintain its current trend in reducing administrative expenses, how long will it take for SCF to achieve a level of 5% or less?
Chapter 3 Solutions
STAT TECH IN BUSINESS & ECON AC
Ch. 3 - The annual incomes of a sample of...Ch. 3 - The six students in Computer Science 411 are a...Ch. 3 - Compute the mean of the following population...Ch. 3 - Compute the mean of the following population...Ch. 3 - a. Compute the mean of the following sample...Ch. 3 - a. Compute the mean of the following sample...Ch. 3 - Compute the mean of the following sample values:...Ch. 3 - Suppose you go to the grocery store and spend...Ch. 3 - For Exercises 710, (a) compute the arithmetic mean...Ch. 3 - For Exercises 710, (a) compute the arithmetic mean...
Ch. 3 - For Exercises 710, (a) compute the arithmetic mean...Ch. 3 - For Exercises 710, (a) compute the arithmetic mean...Ch. 3 - Prob. 11ECh. 3 - Prob. 12ECh. 3 - Prob. 2.1SRCh. 3 - Prob. 2.2SRCh. 3 - Prob. 13ECh. 3 - Prob. 14ECh. 3 - Prob. 15ECh. 3 - Prob. 16ECh. 3 - Prob. 17ECh. 3 - Prob. 18ECh. 3 - Prob. 19ECh. 3 - Prob. 20ECh. 3 - Prob. 3SRCh. 3 - Prob. 21ECh. 3 - Prob. 22ECh. 3 - Prob. 4SRCh. 3 - Prob. 23ECh. 3 - Prob. 24ECh. 3 - Prob. 25ECh. 3 - Prob. 26ECh. 3 - Prob. 5.1SRCh. 3 - Prob. 5.2SRCh. 3 - Compute the geometric mean of the following...Ch. 3 - Prob. 28ECh. 3 - Listed below is the percent increase in sales for...Ch. 3 - Prob. 30ECh. 3 - Prob. 31ECh. 3 - Prob. 32ECh. 3 - Prob. 33ECh. 3 - Prob. 34ECh. 3 - Prob. 6SRCh. 3 - Prob. 35ECh. 3 - Prob. 36ECh. 3 - Prob. 37ECh. 3 - Prob. 38ECh. 3 - Prob. 39ECh. 3 - Prob. 40ECh. 3 - Prob. 7SRCh. 3 - Prob. 41ECh. 3 - Prob. 42ECh. 3 - Prob. 43ECh. 3 - Prob. 44ECh. 3 - Plywood Inc. reported these returns on stockholder...Ch. 3 - Prob. 46ECh. 3 - Prob. 8SRCh. 3 - Prob. 47ECh. 3 - Prob. 48ECh. 3 - Prob. 49ECh. 3 - Prob. 50ECh. 3 - Prob. 51ECh. 3 - Prob. 52ECh. 3 - Prob. 9SRCh. 3 - Prob. 53ECh. 3 - The mean income of a group of sample observations...Ch. 3 - Prob. 55ECh. 3 - Prob. 56ECh. 3 - Prob. 10SRCh. 3 - Prob. 57ECh. 3 - Prob. 58ECh. 3 - Prob. 59ECh. 3 - Prob. 60ECh. 3 - The IRS was interested in the number of individual...Ch. 3 - Prob. 62ECh. 3 - Prob. 63CECh. 3 - Prob. 64CECh. 3 - Prob. 65CECh. 3 - Prob. 66CECh. 3 - Prob. 67CECh. 3 - Prob. 68CECh. 3 - Prob. 69CECh. 3 - Prob. 70CECh. 3 - Prob. 71CECh. 3 - Prob. 72CECh. 3 - Prob. 73CECh. 3 - A recent article suggested that, if you earn...Ch. 3 - Prob. 75CECh. 3 - Prob. 76CECh. 3 - Prob. 77CECh. 3 - Prob. 78CECh. 3 - The Apollo space program lasted from 1967 until...Ch. 3 - Prob. 80CECh. 3 - Prob. 81CECh. 3 - Prob. 82CECh. 3 - Prob. 83CECh. 3 - Prob. 84CECh. 3 - Bidwell Electronics Inc. recently surveyed a...Ch. 3 - Refer to the North Valley Real Estate data and...Ch. 3 - Prob. 87DACh. 3 - Refer to the Lincolnville School District bus...
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