The examples in this section involved the claim that post-1983 pennies have weights with a standard deviation
Question:
The examples in this section involved the claim that post-1983 pennies have weights with a standard deviation less than 0.0230 g. Data Set 20 in Appendix B includes the weights of a simple random sample of pre-1983 pennies, and that sample has a standard deviation of 0.03910 g. Use a 0.05 significance level to test the claim that pre-1983 pennies have weights with a standard deviation greater than 0.0230 g. Based on these results and those found in Example 1, does it appear that weights of pre-1983 pennies vary more than those of post-1983 pennies?
Transcribed Image Text:
Data Set 20: Coin Weights (grams) The "pre-1983 pennies" were made after the Indian and wheat pennies, and they are 97% copper and 3% zinc. The "post-1983 pennies" are 3% copper and 97% zinc. The "pre-1964 silver quarters" are 90% silver and 10% copper. The "post-1964 quarters" are made with a copper-nickel alloy. 3.0630 3.0487 STATDISK: Minitab: Excel: TI-83/84 Plus: Text file names: 2.9149 3.1358 2.9753 Indian Wheat Pre-1983 Pennies Pennies Pennies 3.1366 3.0755 3.1692 3.0476 3.1029 3.0377 3.1083 3.1141 3.0976 3.0862 3.0570 3.0765 3.1114 3.0965 3.0816 3.0054 3.1934 3.1461 3.0185 3.1267 3.1524 3.0786 3.0131 3.1535 3.0480 3.0050 3.0290 Data set name is Coins. Worksheet name is COINS.MTW. Workbook name is COINS.XLS. 3.1038 3.0357 3.0064 3.0936 3.1031 3.0408 3.0561 3.0994 App name is COINS, and the file names are the same as for text files. Text file names are CPIND, CPWHT, CPPRE, CPPST, CPCAN, CQPRE, CQPST, CDOL. 3.1582 3.0406 3.0762 3.0398 3.1043 3.1274 3.0775 3.1038 3.1086 3.0586 3.0603 3.0502 3.1028 3.0522 3.0546 3.0185 3.0712 3.0717 3.0546 3.0817 3.0704 3.0797 3.0713 3.0631 3.0866 3.0763 3.1299 3.0846 3.0917 3.0877 2.9593 3.0966 2.9800 3.0934 3.1340 Post-1983 Canadian Pre-1964 Pennies Pennies Quarters 2.5113 2.4907 2.5024 2.5298 2.4950 2.5127 2.4998 2.4848 2.4823 2.5163 2.5222 2.5004 2.5248 2.5058 2.4900 2.5068 2.5016 2.4797 2.5067 2.5139 2.4762 2.5004 2.5170 2.4925 2.4876 2.4933 2.4806 2.4907 2.5017 2.4950 2.4973 2.5252 2.4978 2.5073 2.4658 2.4529 2.5085 3.2214 3.2326 2.4662 2.8357 3.3189 3.2612 3.2441 2.4679 2.7202 2.5120 6.2771 6.2371 6.1501 6.0002 6.1275 6.2151 6.2866 6.0760 6.1426 6.3415 6.1309 6.2412 6.1442 6.1073 6.1181 6.1352 6.2821 6.26 47 6.2908 6.1661 6.2674 6.2718 6.1949 6.2465 6.3172 6.1487 6.0829 6.1423 6.1970 6.2441 6.3669 6.0775 6.1095 6.1787 6.2130 6.1947 6.1940 6.0257 6.1719 6.3278 Post-1964 Quarters 5.7027 5.7495 5.7050 5.5941 5.7247 5.6114 5.6160 5.5999 5.7790 5.6841 5.6234 5.5928 5.6486 5.6661 5.5361 5.5491 5.7239 5.6555 5.6063 5.5709 5.5591 5.5864 5.6872 5.6274 5.6157 5.6668 5.7198 5.6694 5.5454 5.6646 5.5636 5.6485 5.6703 5.6848 5.5609 5.7344 5.6449 5.5804 5.6010 5.6022 Dollar Coins 8.1008 8.1072 8.0271 8.0813 8.0241 8.0510 7.9817 8.0954 8.0658 8.1238 8.1281 8.0307 8.0719 8.0345 8.0775 8.1384 8.1041 8.0894 8.0538 8.0342
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 71% (14 reviews)
To test the claim that pre1983 pennies have weights with a standard deviation greater than 00230 g y...View the full answer
Answered By
BillClinton Muguai
I have been a tutor for the past 5 years. I have experience working with students in a variety of subject areas, including computer science, math, science, English, and history. I have also worked with students of all ages, from elementary school to college. In addition to my tutoring experience, I have a degree in education from a top university. This has given me a strong foundation in child development and learning theories, which I use to inform my tutoring practices.
I am patient and adaptable, and I work to create a positive and supportive learning environment for my students. I believe that all students have the ability to succeed, and it is my job to help them find and develop their strengths. I am confident in my ability to tutor students and help them achieve their academic goals.
0.00
0 Reviews
10+ Question Solved
Related Book For
Question Posted:
Students also viewed these Mathematics questions
-
The preceding excerise involved the claim that post 1983 pennies have weights with a standard deviation less than 0 0230 g Date set 21 in appendix includes the weights of a simple random sample of 35...
-
Data Set 21 in Appendix B includes a simple random sample of 37 weights ofpost-1983 pennies. Those 37 weights have a mean of 2.49910 g and a standard deviation of 0.01648g. U.S. Mint specifications...
-
Data Set 21 in Appendix B includes a simple random sample of wheat pennies. U.S. Mint specifications now use a standard deviation of 0.0230 g for weights of pennies. Use a 0.01 significance level to...
-
You have observed the following returns over time: Assume that the risk-free rate is 6% and the market risk premium is 5%. a. What are the betas of Stocks X and Y? b. What are the required rates of...
-
Radial keratotomy is a type of refractive surgery in which radial incisions are made in the cornea of myopic (nearsighted) patients in an effort to reduce their myopia. Theoretically, the incisions...
-
Use the implicit finite difference method to solve the heat conduction problem on the unit square: \[\begin{aligned}& \frac{\partial^{2} u}{\partial x^{2}}=\frac{\partial u}{\partial t} \\& u(x, 0)=x...
-
List the advantages of using PLCs in safety applications, as compared to relays.
-
Peter owns 50% of Air South Corporation, an air charter service. His S corporation stock basis at beginning of the year is $100,000. Air South has not done well this year and will report an ordinary...
-
1: Explain what happens to create regional and contact metamorphism? 2: Describe radioactive decay processes and the half-life? 3: Identify and describe fault and fold types? 4: Explain 3 of the 7...
-
The Armory Committee was composed of officers from various National Guard units. It organized a New Years Eve dance at a charge of $2 per person to defray costs. Perry, along with others, was a...
-
Use the sample results from Exercise 7 to test the claim that the generated values are from a population with a standard deviation equal to 12.5. Use a 0.05 significance level. Exercise 7 The...
-
Find the test statistic and critical value(s). Also, use Table A-4 to find limits containing the P-value, then determine whether there is sufficient evidence to support the given alternative...
-
Use pentominos to tile a rectangle of the size requested in Problems 5455. 4 15
-
The following figures show the level curves of f and the constraint curve g(x, y) = 0. Estimate the maximum and minimum values of f subject to the constraint. At each point where an extreme value...
-
In this exercise you will deter- mine if there is a relationship between height and shoe size. (a) Have classmates write their shoe size and height in inches on a slip of paper. When you have enough...
-
Write a polynomial function that imitates the end behavior of each graph in Exercises 9093. The dashed portions of the graphs indicate that you should focus only on imitating the left and right...
-
Using the Shewhart charting methods described in Figure 2.4 in Chapter 2, analyze the performance of the following invoice processing activity. The standard time to validate an invoice for payment is...
-
Use the graph of the rational function in the figure shown to complete each statement in Exercises 914. Vortical asymptoto: x = -3 Horizontal asymptoto: y = 0 -3 -2 -1 y 3+ 2+ -2- -3- 2 3 X Vertical...
-
What three amounts are reported on the balance sheet for a long-term asset such as equipment?
-
Identify the source of funds within Micro Credit? How does this differ from traditional sources of financing? What internal and external governance mechanisms are in place in Micro Credit?
-
The listed body temperatures were obtained from Dr. Steven Wasserman, Dr. Philip Mackowiak, and Dr. Myron Levine, who were researchers at the University of Maryland. Is the source of the data likely...
-
When studying the relationship between lengths of feet and heights so that footprint evidence at a crime scene can be used to estimate the height of the suspect, a researcher records the exact...
-
In 1936, Literary Digest magazine mailed questionnaires to 10 million people and obtained 2,266,566 responses. The responses indicated that Alf Landon would win the presidential election. He didnt....
-
1. Explain what the "Deinstitutionalization Mandate" is. This should be done in at least two paragraphs. 2. In another two paragraphs, discuss how status offenses are connected to the...
-
You are the owner of a very small business that sells gourmet coffee. You sell only one product, a 12-ounce bag of whole-bean French roast coffee. You sell each bag of coffee for $14 each, but due to...
-
Find the instantaneous rate of change of the function f(t)=3+5t when t=-3.
Study smarter with the SolutionInn App