Consolidated Power, a large electric power utility, has just built a modern nuclear power plant. This plant discharges waste water that is allowed to flow into the Atlantic Ocean. The Environmental Protection Agency has ordered that the waste water may not be excessively warm so that thermal pollution of the marine environment n
Determine the standardized test statistic to test the claim about the population proportion 'p' is 0.325 given n=42 and p-hat=0.247, use alpha=0.05
Indicate the statistical test, the degrees of freedom, the level of significance, the region of rejection, the critical value, the calculated value of the test statistic, and the probability. Situation A The number of new US book titles increased from almost 47,000 in 1990 to over 48,000 in 1991. However, this was still bel
A psychology researcher who does work in creativity wants to determine whether her sample of 50-year-old adults (N = 150) differs statistically from the population of 50-year-olds in intelligence.
Dear OTA, Please help me with steps. Thanks These problems will follow the hypothesis-testing format that is similar to (but not exactly the same as) the one your textbook uses. 1. A psychology researcher who does work in creativity wants to determine whether her sample of 50-year-old adults (N = 150) differs statis
I do not understand the worksheet for this project. Please explain. I have attached this to the file. Understanding Experiments with Two Groups Twenty sets of depressed twins are obtained for a study on the effects of a new antidepressant. In each twin set, one twin is assigned to receive the drug, and the other is desi
Researchers who are interested in schizophrenia examined 15 pairs of identical twins, where one twin was schizophrenic ("affected") and the other was not ("unaffected"). Through MRI studies, they measured the volumes of several regions and subregions within the twin's brains. The data here contains the volumes (in cubic centim
Hypothesis Testing - A market research consultant hired by the Pepsi-Cola Co is interested in determining whether there is a difference between the portions of female and male consumers who favor Pepsi Cola over Coke Classic in a particular urban location.
Need help setting up the problem. I understand the mechanics of the problem, I am having trouble setting up P1 and P2 based on the 2 way table (established from the data). ------------------------------------------------------------------- A market research consultant hired by the Pepsi-Cola Co is interested in determining
3. At a food processing plant, a machine produces 10 lb bags of sugar. In this particular process, it is important that the sugar content does not go below 9.9 lbs. In fact, when the bags of sugar are less than 9.9 lbs, maintenance is performed on the machine. Consider a hypothesis test where: Ho: X > 9.9 lbs. (In this c
1.An insurance company states that 90% of its claims are settled with 5 weeks. A consumer group selected a random sample of 100 of the company's claims and found 75 of the claims were settled within 5 weeks. Is there enough evidence to support the consumer group's claim that fewer that fewer than 90% of the claims were settled
Quarterly customer surveys are taken at a medical center. Each individual department has scores and is comparted to the medical center average. Department of Physical Therapy had scores of 9.14, 9.19 and 7.75 for quarters 1-3 respectively. The medical center had scores of 9.01, 9.00 and 9.05 for quarters 1-3 respectively.
At one time, the theory of biorhythms was very popular. The theory behind it is that our lives are affected by three primary cycles: Physical, Emotional, and Intellectual. These three cycles can be plotted as sine waves, beginning at zero on the day that a person is born. When any of the individual cycles is at a high point, the
Here, you are ready to test the hypothesis you have formulated in your JRT experimental design from the Unit 2 assignment. The task is to adjust and reframe your variables and hypothesis in such a way that it can be adequately demonstrated with collected data (better known as Sekaran's Step #8 in the Research Process). Once yu h
The Environmental Protection Agency (EPA) estimated that the, on average, 1994 Polaris automobile obtains a 35 miles per gallon (mpg) on the highway. However, the company that manufactures the car claims that the EPA has underestimated the Polaris' mileage. To support its assertion, the company randomly selects 50 1994-Polaris
1. A study was conducted to estimate the mean amount spent on birthday gifts for a typical family having two children. A sample of 150 was taken, and the mean amount spent was $225. Assuming a standard deviation equal to $50, find the 95% confidence interval form, the mean for all such families. 2. In testing the hypothesis,
Statistics - Which of the following statements is not true about the level of significance in a test of hypothesis?
I have a good deal of difficulty with statistics - can you please assist me with the following attachment. Thank you. Please see attached file for full problem description. 1. If the null hypothesis is true and the researchers reject it, a Type II error has been made. True False 2. Which of the following statem
If John Smith is charged with a crime under the U.S. legal system and is brought to trial, what are the null and alternative hypotheses that the judge, the jury, and the prosecution must work under? If the jury decides in favor of John Smith does this mean that he has been proven innocent? What about if the jury finds against hi
I've been trying to understand the differences between one tailed and two tailed testing, t and z testing and p value. I think I understood #5 but need some help with #18, 23 and 44. 18. The management of White Industries is considering a new method of assembling its golf cart. The present method requires 42.3 minutes, on the
A particular magazine typically has 65% subscription renewals. A new advertising campaign is introduced to see if this can be increased. To monitor renewals, a sample of 300 subscribers is taken each month to see what percentage renew their subscription. What are the upper and lower control limits for a control chart for the
You are a water quality tester, working for the EPA. You are testing the water in a stream just below the point where a major manufacturing company runs water from its plant into the stream. In particular, you are testing for the presence of a pollutant that is supposed to be held at a mean level of 10 ppm. You test the follo
1. We have now studied two statistics Z and t. Compare and contrast the use of these two statistical tests, with particular attention to the quantity and quality of the data we use in each test. Is one test better than the other? 2. In research the concept of p value is useful to interpret the results of a hypothesis test.
The data to the left are the highway mileage obtained from 20 automobiles of the same make and model driven under normal conditions by 20 different owners. a. The sticker on the automobile claims that cars of this type get an average of 30 miles per gallon. However the average of these 20 autos is only 28.6 miles per gallon.
8.76 A random sample of 25 SUV's of the same year and model revealed the following miles per gallon (mpg) values: 12.4 13.0 12.6 13.1 13.0 12.0 13.1 12.6 9.5 13.25 12.4 11.7 10.0 14.0 10
Dear: I need help with the following sample question. Many thanks! Could you offer me related data and detailed explanations to the sub-questions so that I can attack similar problems? Thanks! The question: We will run a regression to test whether the Random Walk Model describes daily adjusted closing prices for S
EXERCISES FROM LIND (Statistical Techniques in Business & Economics by Lind, et al) 1. The Grand Strand Family Medical Center is specifically set up to treat minor medical emergencies for visitors to the Myrtle Beach area. There are two facilities, one in the Little River Area and the other in Murrells Inlet. The Quality Assu
Please see attached file for full problem description. Chapter 10 For Exercises 1 & 3 answer the questions: (a) Is this a one- or two-tailed test? (b) What is the decision rule? (c) What is the value of the test statistic? (d) What is your decision regarding H0? (e) What is the p-value? Interpret it. 1. The following in
Please see attached file for full problem description. 1- At LLD Records, some of the market research of college students is done during promotions on college campuses, while other market research of college students is done through anonymous mail, phone, internet, and record store questionnaires. In all cases, for each new C
The nighttime cold medicine Dozenol bears the label indicating the presence of 600 mg of acetaminophen in each fluid ounce of drug. The Food and Drug administration randomly selected 98 one ounce samples and found that the mean acetaminophen is 575 mg, whereas the standard deviation is 55 mg. Use a 21% significance level and tes
1. Variance is... A. The average of the squared deviation from the mean. B. A measure of variability of data values about the mean. C. A measure of dispersion. D. All of the above. F. None of the above. 2. Analysis of variance means... A. We compute the variances of the variables observed in the study.
1-Refer to the table below (Computer-interactive Data analysis) that lists the number of years that U.S president and popes and British monarch (since 1690) lived after their inauguration, election, or coronation. Determine whether the survival times for the three groups differ. See attachment for data. 2q-Archaeology: Skull
Statistical problems from the book Basic Statistics for Business and Economics. Lind, D. McGraw-Hill/Irwin Series
60. Owens Orchards sells apples in a large bag by weight. A sample of seven bags contained the following numbers of apples: 23, 19, 26, 17, 21, 24, 22. a. Compute the mean number and median number of apples in a bag. b. Verify that _(X _ ) _ 0. 62. The Citizens Banking Company is studying the number of times the ATM located