1. Identify the null hypothesis and the alternative hypothesis. A researcher claims that 62% of voters favor gun control. H0: p < 0.62 H1:p >= 0.62 H0: p = 0.62 H1: p not = 0.62 H0: p not = 0.62 H1: p = 0.62 H0: p > = 0.62 H1: p < 0.62 2. Assume that the data has a normal distribution and the nu
Par, Inc., is a major manufacturer of golf equipment. Management believes that Par's market share could be increased with the introduction of a cut-resistant, longer-lasting golf ball. Therefore, the research group at Par has been investigating a new golf ball coating designed to resist cuts and provide a more durable ball. T
According to the historical data, the life expectancy in the United States is equal to the life expectancy in Germany. A new study has been made to see whether this has changed. Records of 225 individuals from the United States who died recently are selected at random. The 225 individuals lived an average of 77.7 years with a
The null and alternate hypotheses are: H0:µ1= µ2 H1:µ1 ≠µ2 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 devia
In some places in the US, people are aware of the need for more care for older citizens, like Dr. Hope. In the election in one area, they put forward a referendum that would increase the county sales tax by one cent to pay for increased services for this important part of the community. Registered voters were asked to vote Yes,
Some feminists have asserted that the Wechsler IQ tends to treat females differently from males. Another group, who advocates for people with psychiatric disorders, might say the same thing about people with psychiatric disorders. To examine these alleged differences they studied the following clients using only the most indicat
You have been fortunate enough to receive a grant from a foundation studying pain in arthritis victims under the age of 30. You have not found a lot of people, but you think that you may have identified something that works pretty good. They are measured on an established scale pain scale from 20 (not much pain) to 100 (a lot of
In 2001, the U.S. department of Labor reported the average hourly earnings for U.S Production workers to be $14.32 per hour. A sample of 75 production workers during 2003 showed a sample mean of $14.68 per hour. Assuming the population standard deviation = $1.45, can we conclude that an increase occurred in the mean hourly earni
1. If the alpha level is set at 0.01, then what is the result of likelihood of a significant result occurring, due to mere chance? 2. Four pairs of data yield r = 0.942 and the Regression equation =3x. Also, y-bar =12.75. What is the best predicted value of y for x=2.6? 3. What should be used as a
1. You would like to help some of your math-deficient friends understand probability before they loose too much on lottery tickets. After shuffling two decks of cards, you lay down 40 of them. You say that there should be 10 in each of the four suits: hearts, diamonds, spades, and clubs. What you actually get is 9 hearts, 8 di
Conclude if there is a difference in the mean income. The null hypothesis is that the mean scores are the same for the three ratings. The null hypothesis is: H0: µ1 = µ2 = µ3 The alternate hypothesis is that the mean scores are not all the same for the three ratings. H1: Treatment means are not all the same or
Consider the following hypothesis test. See attached file for full problem description. Consider the following hypothesis test The following data are from matched samples taken form two populations. Populations Element 1 2 1 21 20 2 28 26 3 18 18 4 20 20 5 26 24
Your supervisor has asked you to conduct a survey about consumers' buying habits. For this task, you surveyed 100 men and 100 women at a local shopping mall. Of the men, 79 said they had used a credit card to make a purchase over $20 in the past week, while 84 of the women admitted to this type of purchase. How would you sta
1.In a randomized controlled trial in Kenya, insecticide treated bednets were tested as a way to reduce malaria. Among 343 infants who used the bednets, 15 developed malaria. Among 294 infants not using bednets, 27 developed malaria. Use a 0.01 significance level to test the claim that the incidence of malaria is lower for i
I am not sure what formulas to use to calculate the relationships between data. I have attached the data I have collected, but I am not sure how to utilize it correctly. How can you hypothesize a meaningful relationship between the data sets? Assuming a meaningful relationship is possible, what would your null and alter
The company you work for employs 585 assembly-line workers - 526 men and 59 women. 16 men and 10 women have been laid off. Of the 526 male assembly-line workers, 134 were over 40 years of age. 12 of the 16 laid off men are over 40 years of age. Those 12 men are alleging that they were discriminated against because of their ag
I have four restaurants with a nearest neighbor analysis defining the restaurant pattern as clustered, random, or dispersed. Italian: Observed mean distance/expected mean distance = 0.67 Less than 1% likelihood it being clustered is random Z score = 6.3 standard deviations Significance Levels: 0.01;
1 Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim. a) The Genetics and IVF Institute conducted a clinical trial of the YSORT method designed to increase the probability of conceivin
1 Identifying the indicated value using Statdisk Data Set 2 in Statdisk (Body temp) includes a sample of 106 body temperatures with a mean of 98.20 F. Assume that σ is known to be 0.62F. Consider a hypothesis test that uses a 0.05 significance level to test the claim that the mean body temperature of the population is l
Give one example that you can apply hypothesis testing in your work (in accounting). Give one limitation of using Excel's statistical functions for the task of hypothesis testing (i.e., what can't Excel do for you in accounting).
1 Identify H0 and H1 The mean top of knee height of a sitting male is 20.7 in. 2 Identify H0 and H1 High school teachers have incomes with a standard deviation that is less than $20,000. 3 Find critical values Two-tailed test; a =0.01. 4 Find critical values Left-tailed test; a =0.05. 5 Find critical values
See attached file for full problem description.
Use the Internet or other resources to find an example of a research article in a professional journal of interest to you, and not in daily periodicals or weekly publications. Prepare a synopsis of the article including the following: a. Define the business research and its purpose. b. Explain the business problem(s) under i
Question 1 For the given data, find (a) the point estimate of the population mean and (b) the margin of error for a 90% confidence interval. Lengths of work commute of 32 people (in miles): 12 9 7 2 8 7 3 27 21 10 13 3 7 2 30 7 6 13 6 14 4 1 10 3 13 6 2 9 2 12 16 18 Question 2 a. Find the critical value of tc for the
A sample of employees at a large chemical plant was asked to indicate a preference for one of three pension plans. The results are given in the following table. Does it seem that there is a relationship between the pension plan selected and the job classification of the employees? Use the .01 significance level. Pension Pla
What is the difference between practical significance and statistical significance? Can you give me an example?
A sample of 60 college students was given a special training program designed to improve their time management skills. One month after completing the course the students were contacted and asked whether the skills learned in the program were effective. A total of 42 responded yes. At the .05 significance level, can we conclude t
Question 1 Which one of the following statements is true to perform a z-test for the difference between two population mean μ1 and μ2? a. Three conditions are required to perform such a test. b. The samples must be independent and selected randomly. c. Sample size must be at least 30. d. All of the above. Ques
Question 1 Which one of the following statements is true to perform a z-test for the difference between two population mean mu1 and mu2? a. Three conditions are required to perform such a test. b. The samples must be independent and selected randomly. c. Sample size must be at least 30. d. All of the above. Question 2
A computer manufacturer offers a help line that purchasers can call for help 24 hours a day, 7 days a week. Clearing these calls for help in a timely fashion is important to the company's image. After telling the caller that resolution of the problem is important the caller is asked whether the issue is "software" or "hardware"