Here are heart rates for a sample of 30 students before and after a class break. At alpha = .05, was there a significant difference in the mean heart rate? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic. (d) Make a decision. (e) Estimate the p-value and interpret it. Heart
For the preceding problem you should find that there are significant differences among 3 treatments. The primary reason for the significance is that the mean for treatment 1 is substantially smaller than the means for the other two treatments.To create the following data we started with the values from problem 7 and added 3 poin
To evaluate the effect of a treatment , a sample of n=9 is obtained from a population with a mean of m=40 and the treatment is administered to the individuals is found to be M-33 A: If a sample has a standard deviation of s=9, are the data sufficient to conclude that the treatment has a significant effect using a two tailed t
The association of Home Builders provided information on the cost of the most popular home remodeling projects. Sample data on cost for the two types of remodeling projects are as follows.(in thousands of dollars) Kitchen Master Bedroom 25.2 18 17.4 22.9 22.8
Here are heart rates for a sample of 30 students before and after a class break. At ? = .05, was there a significant difference in the mean heart rate? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic. (d) Make a decision. (e) Estimate the p-value and interpret it. HeartRate
A half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml. (a) Which sampling distribution would you use if random samples of 10 bottles are to be weighed? Why? (b) Set up hypotheses and a two-tailed decisi
See attached file. Measuring Association Go to the Resources section in this syllabus and open the file media.xls. This file contains information from a study indicating where different age groups primarily get their news. Each cell represents the number of responses from that particular group. At the .05 level of sig
Problem 1 There are four auto body shops in Bangor, Maine, and all claim to promptly serve customers. To check if there is any difference in service, customers are randomly selected from each repair shop and their waiting times in days are recorded. The output from a statistical software package is: ANOVA Source of Varia
Need a brief example of the following: Cite an example of how you could/would apply a test of a hypothesis for a single mean, one tail test described in the lecture to real world situations? Make sure you state your hypothesis in both the null and alternate form as well as showing the hypotheses in symbol form such as Ho : u
1. An industrial engineer at Lyons Products would like to determine whether there are more units produced on the afternoon shift than on the morning shift. A sample of 50 morning-shift workers showed that the mean number of units produced was 345, with a standard deviation of 21. A sample of 60 afternoon-shift workers showed the
There has been much debate over the use of the death penalty. Advocates of the death penalty feel that the penalty will reduce crime. However, as we have seen in recent years, it is being revealed that many innocent individuals may have been falsely convicted and sentenced to death due to prejudiced jurors and mishandling of evi
1. What are the four levels of measurement scales? Give examples of each and explain in detail. 2. Explain the use of normal probability plot to evaluate whether a set of data is normally distributed? Please discuss in detail. 3. Discuss how a sample size, n, an increase in confidence is achieved by widening the confidenc
Question #1- Using your experience from previous or current employment, provide a business example where you could use a t-test to assist in a business decision. State the null and alternative hypothesis. The null and alternative should be the exact opposite of each other and the t-test will be looking for a difference between t
A summary on the daily consumption of caffeine for a sample size of 49 adult women produced: Ð? = 49 X bar = 215 mg s = 235 mg range: 5 to 1176 1. Does it appear plausible that the population distribution of daily caffeine consumption is normal? Explain 2. Is it necessary to assume a normal population distribut
See attached data file. Assignment 6 Measuring Differences Between Two Means (1) Go to the Resources section in this syllabus and open the file restaurants.xls. This data file contains ratings for food, decor, service, and the price per person for a sample of 50 restaurants located in an urban area and 50 restaurants
Human Body Temperature: What's Normal? In an article in the Journal of Statistics Education (vol. 4, no. 2, 1996), Allen Shoemaker describes a study that was reported in the Journal of the American Medical Association.* It is generally accepted that the mean body temperature of adult humans is 98.6°F. In his article, Shoemaker
Problems 23 & 37 For each claim, assume the distribution of the population is approximately normal. 23. Microwave Repair Costs ◆ A microwave oven repairer says that the mean repair cost for damaged microwave ovens is less than $100.You work for the repairer and want to test this claim. You find that a random sample
Sethi and Seligman examine relationship between religious optimism and conservatism. Test differences if possible
Prepare an analysis of your selected article. Start by identifying and summarizing the hypothesis described in the article. Then explain whether the hypothesis was rejected or accepted, and what the implications of this finding are for the study. Use the following article: Job satisfaction of managers in tourism: Cases in the
1. Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of .05. R = -0.8444, n=5 Critical values: r =± 0.950, no significant linear correlation
Please show all work. More men than women were randomly assigned to the Clardozan group. After a careful examination of the results, the pharmaceutical company wonders if gender influenced the results. Conduct a test to determine if there was a relationship between gender and group assignment using the .05 level of signific
What are the 3 Levels of Measurement and the 2 variables in any hypothesis statement?
Problem A The manager of a grocery store claims that the average time that customers spend in checkout lines is 20 minutes or less. A sample of 36 customers is taken. The average time spent on checkout lines for the sample is 24.6 minutes; and the sample standard deviation is 12 minutes. Conduct a hypothesis test (at 0.05 l
1. Last year, according to consumer group, the average passenger vehicle was driven 10.3 thousand miles with a standard deviation of 2 thousand miles before a claim of accident was made. A random sample of 225 passenger cars was collected by the auto insurance company which showed a mean of 10.1 thousand miles driven when a cl
1. (TCO 8) For the following statement, write the null hypothesis and the alternative hypothesis. Then, label the one that is the claim being made. A special insulation will lower your heating bills by less than $78. 2. (TCO 11) A 15-minute Oil and Lube service claims that their average service time is no more than 15 m
1. A machine produces 5-inch nails. A sample of 12 nails was selected and their lengths determined. The results are as follows: 4.85 4.80 4.89 4.82 4.94 4.96 4.96 4.83 4.80 4.84 4.95 4.88 Assuming that alpha = 0.10, test the hypothesis that the population mean is equal to 5. i) State the null and alternate hypot
1. Assume that you plan to use a significance level of ? = .05 to test the claim that p1 =p2. Use the given sample sizes and numbers of successes to find the pooled estimate p. Round to the nearest thousandth n1 = 34 n2 = 414 x1 = 15 x2 =105 2. Assume that you plan to use a significance level of ? = .05 to test the
Validity is more critical to measurement than reliability. A valid measurement is reliable, but a reliable measurement may not be valid. Do you agree with these statements? Explain your answer. Provide examples to support your rationale.
Hope you can help me to understand and do this assignment. Thanks much. How does hypothesis testing contribute to the scientific knowledge base? What is one example of a null hypothesis statement?
Explain what you know about hypothesis and hypothesis testing. Describe the five-step hypothesis-testing procedure? Discuss the concepts of Type I and Type II Errors? How do they relate to hypothesis testing?