We want to test the claim that the Smith method of gender selection is effective in increasing the likelihood that a baby will be born a girl. In a random sample of 80 couples who use the Smith method, it is found that among the 80 newborn babies, there are 35 girls. What should we conclude about the claim? Why is it nece
Tom Smith wants to test the hypothesis that adult men have a mean weight that is greater than 150 pounds. Tom surveys the adult male members of his family and obtains 40 sample values, which lead him to support the alternative hypothesis that the population mean is greater than 150 pounds. What is the fundamental flaw in hi
I love filet mignon. The full cut is supposed to weigh 16 ounces when fully cooked. My restaurant serves 200 servings of filet mignon per day. The restaurant claim is they serve filets that are 16 ounces with a standard deviation of .4 ounces due to shrinking while cooking. I ate filet mignon for 16 days straight. The average we
Taking a trip to Sweden again. Last years statistics report showed that 65% of the entire adult population are women. I had a friend in Sweden take a poll to see if this was true. He picked 50 adults at random and reported that 36 of them were female. Is it possible that the proportion of women is different than what I read in t
Please solve these four problems: 1) The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles. The Crosset Truck Company bought 48 tires and found that the mean mileage for t
1) The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles. The Crosset Truck Company bought 48 tires and found that the mean mileage for their trucks is 59,500 miles. Is Crosse
Prepare an analysis of the attached article and identify the hypothesis described in the article, and explain how the hypothesis statement was used in the study.
A radio station in Myrtle Beach announced that at least 90% of the hotels and motels would be full for the Memorial Day weekend. The station advised listeners to make reservations in advance if they planned to be in the resort over the weekend. On Saturday night a sample of 58 hotels and motels showed 49 with a no vacancy sign a
(See attached file for full problem description) --- 12. The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds. a) What is the value of the population mean? What is the bes
(See attached file for full problem description) --- The lives of many people are affected by fear that prevents them from flying. The Marist Institute of Public Opinion conducted a poll of 1014 adults, 48% of whom were men. According to a USA Today newspaper poll. ? 47% of Adults believe flying is the safest way to trave
1. Although opinion polls have long found that about 40% of American adults say they attend religious services last week, this is almost certainly not true. a. Why might we expect answers to a poll to overstate true church attendance? b. You suspect strongly that the true percentage attending church in any given week is less
I am writing a report for class and I need to understand what statistical procedure was used. The article does not give the beginning number but they do say 15 melanoma patients enrolled in the study failed to show sustained improvement from the modified immune cells. Twelve of those patients have died, and the other three are
See attached files for full problem description. The sales manager of your company wishes to evaluate the performance of the company's sales representatives. Each sales representative is solely responsible for one sales territory. You and the manager believe that sales performance substantially depends on the above collecte
From the sample statistics, find the value of p-bar used to test the hypothesis that the population proportions are equal. n1 = 100 n2 = 100 x1 = 39 x2 = 43 0.287 0.369 0.410 0.451
Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is µ d = 0. Compute the value of the t test statistic. x 7 2 7 3 10 y 4 4 3 4 5 t=1.292 t=0.578 t=0.415 t = 1.203. See attached file.
When you have the equation Ho : P > Po What is P or Po what you are solving for or z?
1. A recent article in a university newspaper claimed that the proportion of students who commute more than 15 miles to school is no more than 25%. Suppose we want to test the hypothesis. State hypothesis Ho and the alternative hypothesis H1 that we would use for this test. 2. The management of White Industries is considerin
1. Two boats, the Prada (Italy) and the Oracle (U.S.A.), are competing for a spot in the upcoming America's Cup race. They race over a part of the course several times. Below are the sample times in minutes. At the .05 significance level, can we conclude that there is a difference in their mean times? Boat Times (minutes) P
Lind Problems 1. The American Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds. a. What is the value of the population mean? What is the best estimate of this value? b. Explain
1. The owner of the Kate and Edith Cake Company state that the average number of buns sold daily was 1,500. A worker in the store wants to test the accuracy of the boss's statement. A random sample of 36 days showed that the average daily sales were 1,450 buns. Using a level of significance of .01 and assuming that the standa
1. Discuss an example where you would use a test of hypothesis for in your professional life, personal life, education or politics. Provide sufficient details so that the context is clear and also discuss if the example involves: population mean or proportion large sample or small sample one or two populations descrip
Test the claim that the samples come from populations with the same mean. Assume that the populations are normally distributed with the same variance. Given the sample data in the attachment, test the claim that the populations have the same mean. Use a significance level of 0.05. Find the test statistic F. Use three dec
1. _____ is a procedure for deriving a mathematical relationship, in the form of an equation between a single metric dependent variable and a single metric independent variable. a. chi-square b. part correlation c. multiple regression d. bivariate regression 2. _______ are hypothesis testing procedures that assume
A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12. A random sample of 17 observations from the second population revealed a sample mean of 342 and a sample standard deviation of 15. At the 0.1 significance level is there a difference in the population
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the attached sample information. At the .01 significance level, is there a relationship between job pressure and age?
Your firm is located in a 10-story building. Each floor has its own Xerox machine in a copy room. The firm owns these machines but must pay for paper, toner, and occasional maintenance. Each employee has a key that opens the copy room door on his or her floor only and does not have access to Xerox machines on other floors. B
Details: PiggyBank has narrowed its options down to two incentive plans: A. cash back when the consumer makes an online purchase; and B. cash back when the consumer makes a purchase at a clothing store. The bank doesn't know whether consumers would shop online more than at clothing stores. Information Experts has placed you
Use 0.05 significance level to test the claim. Assume the populations are normally distributed. Claim: Super filter filtered water varies more in unfiltered particulates than trusty filter filtered water. Super filter: n1 = 16, x- bar = 0.02, standard deviation = 0.0045 Trusty Filter: n2 = 16, x- bar =0.02 , standard
1. A polling organization conducted a study to test the claim at the 0.01 significance level, that the "refuse to respond the surveys" proportions are the same for the male and female college students. Among 134 randomly selected students, 9.3% refused to respond on a survey on cheating while among 154 male college students, 14.
Ear coning is a simple and safe way to remove excess wax and toxins from the inside of your ear. Ear coning is more comfortable and less invasive than conventional ear cleaning. The benefits have been documented through case histories by qualified practitioners. The benefits include improved hearing, visions, taste, smell, ba