Pennies made before 1983 are 97% copper and 3% zinc, whereas pennies made after 1983 are...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Pennies made before 1983 are 97% copper and 3% zinc, whereas pennies made after 1983 are 3% copper and 97% zinc. Listed below are the weights (in grams) of pennies from each of the two time periods. Find the mean and median for each of the two samples, then compare the two sets of results. 3.1087 3.1581 Before 1983: After 1983: 3.1035 3.0779 2.4904 2.4953 2.4841 2.4997 *** The mean weight of the pennies made before 1983 is grams. (Round to five decimal places as needed.) The median weight of the pennies made before 1983 is grams. (Round to five decimal places as needed.) The mean weight of the pennies made after 1983 is grams. (Round to five decimal places as needed.) The median weight of the pennies made after 1983 is grams. (Round to five decimal places as needed.) Does there appear to be a considerable difference in the means? O A. No, because the difference in the means is less than 5%. B. No, because the difference in the means is more than 5%. OC. Yes, because the difference in the means is more than 5%. O D. Yes, because the difference in the means is less than 5%. 3.1046 2.5024 3.1275 2.4822 Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 54.6 degrees. Low Temperature (o F) Frequency 40-44 45-49 50-54 55-59 60-64 3 7 12 4 1 The mean of the frequency distribution is (Round to the nearest tenth as needed.) degrees. *** Which of the following best describes the relationship between the computed mean and the actual mean? OA. The computed mean is not close to the actual mean because the difference between the means is more than 5% of the actual mean. OB. The computed mean is close to the actual mean because the difference between the means is less than 5% of the actual mean. OC. The computed mean is not close to the actual mean because the difference between the means is less than 5% of the actual mean.. OD. The computed mean is close to the actual mean because the difference between the means is more than 5% of the actual mean. Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the range, variance, and standard deviation for the sample data. Given that these are the top 10 salaries, do we know anything about the variation of salaries of TV personalities in general? 39 38 36 30 18 14 13 9 8.6 7.3 ..... The range of the sample data is $ million. (Type an integer or a decimal.) The variance of the sample data is. (Round to two decimal places as needed.) The standard deviation of the sample data is $ million. (Round to two decimal places as needed.) Is the standard deviation of the sample a good estimate of the variation of salaries of TV personalities in general? O A. No, because the sample is not representative of the whole population. B. No, because there is an outlier in the sample data. C. Yes, because the sample is random. D. Yes, because the standard deviation is an unbiased estimator. Pennies made before 1983 are 97% copper and 3% zinc, whereas pennies made after 1983 are 3% copper and 97% zinc. Listed below are the weights (in grams) of pennies from each of the two time periods. Find the mean and median for each of the two samples, then compare the two sets of results. 3.1087 3.1581 Before 1983: After 1983: 3.1035 3.0779 2.4904 2.4953 2.4841 2.4997 *** The mean weight of the pennies made before 1983 is grams. (Round to five decimal places as needed.) The median weight of the pennies made before 1983 is grams. (Round to five decimal places as needed.) The mean weight of the pennies made after 1983 is grams. (Round to five decimal places as needed.) The median weight of the pennies made after 1983 is grams. (Round to five decimal places as needed.) Does there appear to be a considerable difference in the means? O A. No, because the difference in the means is less than 5%. B. No, because the difference in the means is more than 5%. OC. Yes, because the difference in the means is more than 5%. O D. Yes, because the difference in the means is less than 5%. 3.1046 2.5024 3.1275 2.4822 Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 54.6 degrees. Low Temperature (o F) Frequency 40-44 45-49 50-54 55-59 60-64 3 7 12 4 1 The mean of the frequency distribution is (Round to the nearest tenth as needed.) degrees. *** Which of the following best describes the relationship between the computed mean and the actual mean? OA. The computed mean is not close to the actual mean because the difference between the means is more than 5% of the actual mean. OB. The computed mean is close to the actual mean because the difference between the means is less than 5% of the actual mean. OC. The computed mean is not close to the actual mean because the difference between the means is less than 5% of the actual mean.. OD. The computed mean is close to the actual mean because the difference between the means is more than 5% of the actual mean. Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the range, variance, and standard deviation for the sample data. Given that these are the top 10 salaries, do we know anything about the variation of salaries of TV personalities in general? 39 38 36 30 18 14 13 9 8.6 7.3 ..... The range of the sample data is $ million. (Type an integer or a decimal.) The variance of the sample data is. (Round to two decimal places as needed.) The standard deviation of the sample data is $ million. (Round to two decimal places as needed.) Is the standard deviation of the sample a good estimate of the variation of salaries of TV personalities in general? O A. No, because the sample is not representative of the whole population. B. No, because there is an outlier in the sample data. C. Yes, because the sample is random. D. Yes, because the standard deviation is an unbiased estimator.
Expert Answer:
Answer rating: 100% (QA)
The mean weight of the pennies made before 1983 is 31047 31587 31277 30777 31047 310836 311363 ... View the full answer
Related Book For
Understanding Basic Statistics
ISBN: 978-1111827021
6th edition
Authors: Charles Henry Brase, Corrinne Pellillo Brase
Posted Date:
Students also viewed these mathematics questions
-
Refer to Table 1.6. a. What is the average miles per gallon for city driving? b. On average, how much higher is the miles per gallon for highway driving as compared to city driving? c. What...
-
Refer to Exercise 10-30. What is the average sample number of incoming lots that are 2% nonconforming? What is the average total inspection for this quality level of 2% nonconforming? In Exercise...
-
What is the average cost between $2.50 and $1.95?
-
Josie's new job has a yearly salary of $42,000. Her salary will increase by $4000 each year thereafter. If Josie works for at this job for 30 years how much will she have been paid total over the 30...
-
Arnie, Becky, and Clay are equal partners in the ABC General Partnership. The three individuals each have a $120,000 tax basis in their partnership interest. For business reasons, the partnership...
-
One of the fads of the future might be "century hopping," where occupants of high-speed spaceships would depart from Earth for several years and return centuries later. What are the present-day...
-
A neighborhood fuel cell power plant is to be designed for an electric power output of \(2000 \mathrm{~kW}\) with liquid-water product. Estimate the flow rates of hydrogen and oxygen during peak...
-
Near the end of 2013, the management of Isle Corp., a merchandising company, prepared the following estimated balance sheet for December 31, 2013. To prepare a master budget for January, February,...
-
Silver Records has 4 employees who are paid on the 1 and 15 of each month for the work they performed in the preceding half-month. At November 30, each employee is owed gross pay of $2,250, but each...
-
Explain why the following situation is not an example of discrimination: A teacher seats students wearing short sleeves on the left half of the room and students wearing long sleeves on the right...
-
Your team of three works in the Finance division of the Hexa Manufacturing Ltd. The company is deciding on an investment in a new moulding machine for a new product line. Your team has been asked to...
-
Consider the following two choices: 1. You have to choose between losing \(\$ 7400\) for sure, and a risky alternative, whereby you lose \(\$ 10,000\) with probability 0.75 and nothing with...
-
There is a strong correlation between tobacco smoking and incidence of lung cancer, and most physicians believe that tobacco smoking causes lung cancer. Yet, not everyone who smokes gets lung cancer....
-
Which of the following describes the charges on the droplets that end up in the five tubes, moving from left to right? A. \(+2 q,+q, 0,-q,-2 q\) B. \(+q,+2 q, 0,-2 q,-q\) C. \(-q,-2 q, 0,+2 q,+q\) D....
-
Find a news report concerning an ongoing legal case, either civil or criminal, in which establishing causality is important to the outcome. Briefly describe the issue of causation in the case and how...
-
Charge \(q\) is fired through a small hole in the positive plate of a capacitor, as shown in Figure Q21.2. a. If \(q\) is a positive charge, does it speed up or slow down inside the capacitor? Answer...
-
Find the equation of a line with the slope m = -4 and containing the point (3,-9). Write the equation in slope-intercept form.
-
Use the method of Example 4.29 to compute the indicated power of the matrix. 1 0 1
-
USA Today reported that about 47% of the general consumer population in the United States is loyal to the automobile manufacturer of their choice. Suppose Chevrolet did a study of a random sample of...
-
Effect of Helium-Neon Laser Auriculotherapy on Experimental Pain Threshold is the title of an article in the journal Physical Therapy. In this article, laser therapy is discussed as a useful...
-
Oxygen demand is a term biologists use to describe the oxygen needed by fish and other aquatic organisms for survival. The Environmental Protection Agency conducted a study of a wetland area in Marin...
-
For tidal waves in a channel, what is the mathematical relationship between the speed of the wave and the depth of the channel?
-
What is the change of the speed of sound with frequency called?
-
In the design of a horn tweeter, which parameter is most critical in specifying where the cutoff frequency for the loudspeaker would lie? Why?
Study smarter with the SolutionInn App