1. A sample of 64 observations is selected from a normal population. The sample mean is 216, and the sample standard deviation is 15. Conduct the following test of hypothesis sing the .03 significance level. H0: µ ≥220 H1: µ < 220 a. State the null and the alternate hypothesis b. State the decision rule c. Compute
You're trying to explain null and alternative hypotheses to one of the senior managers at Company W and he's not "getting it" when you use snack food sales. Help him by thinking about a business problem in another organization or department. Formulate a null hypothesis and the corresponding alternative hypothesis that could be t
What is the five-step process for hypothesis testing? Is the order important? Why or why not?
1. Describe the general characteristics of a research study for which an independent-measures t would be the appropriate test statistics 2. What is measured by the estimated standard error that is used for the independent-measures t statistic? 3. Describe the homogeneity of variance assumption, and explain why it is import
See the attached file. Quaker Oats is contemplating changing the shape of its box from the quaint cylinder presently in use. Different random samples were selected from five stores of similar size in the same region, and one of the candidate boxes was substituted for the cylinder for several days. The following results were o
1. Based on the specific question under study, how can one always determine which is the null hypothesis (H0) and which is the alternative hypothesis (H1). 2. A consumer advocate tests the claim that the Toyota Corolla actually delivers less than 32 mpg (as stated on the advertisements). So, we have:
1. Degrees of freedom for the independent-measures t statistic can be computed as df = n 1 + n 2 - 2. True False 2. For an independent-measures study comparing two samples with n = 8 in each sample, the t statistic would have df = 15. True False 3. Which of the following rese
Ten automobiles were driven on a measured test track - once with standard gasoline with no additive and once with an additive supposed to increase miles per gallon (mpg). The results are given below: mpg / car # 1 2 3 4 5 6 7 8 9 10 without additive 19 22 25 18 26 21 23 28 24 24 with additive
Safe T cigarettes claim that their product has "low tar." Government standards are that this claim is invalid if there are more than 13.5mg tar per cigarette. A sample of five Safe T cigarettes gives 14.0, 13.7, 13.9, 13.8, and 14.1 mg of tar. Is there sufficient evidence at the alpha=0.05 significance level for the governmen
1. The dependent and independent variables as they are not correct. Please advise. 2. Also, need advise on formulating the research question and developing the hypotheses Equation: The random sample population is 500 people who shop for workout programs and equipment. The sample mean of those shopping is that they spend an
Equation: The random sample population is 500 people who shop for workout programs and equipment. The sample mean of those shopping is that they spend an average of $250.00 per purchase and perchance at least 2 to 3 items for working out and weight lost Assume that the population of consumers is normally distributed with mean M
Please help me with the following statistical problem: A sample is taken prior to a major election of likely voters. The null hypothesis is that the votes will be split 50/50. One candidate gets 54% of the support in the sample and the p-value for this sample is calculated to be 0.12. What is the correct interpretation o
Given the following information about a hypothesis test of the difference between 2 means based on independent random samples, what is the correct rejection region at a significance level of .05? Ha: Ua> Ub x1-112, x2=9 s1=4, s2=2 n1=13, n2=10.
Describe the results of the test and explain how the use of this hypothesis testing can be used to evaluate solutions to your research issue. Steadily rising transportations expend larger portions of the consumer budget. This test is specifically targeting funds spent on public transportation, gasoline, or toll fees. In orde
This is a hypothesis testing problem. I have set up the null and alternative hypotheses. I need assistance in completing the requirements located at the bottom of the document. Steadily rising transportations expend larger portions of the consumer budget. This test is specifically targeting funds spent on public transportatio
The weights of 9 of managers at Company X are determined. They have a mean of 70.2 Kg, and a standard deviation of 1.5 Kg. Use a 0.01 significance level to test the claim that managers at Company X have weights with a mean that is greater than the mean of 63.6 Kg for managers from the general population. Given that there are
Working at Company X is very stressful for any human being. Medecines Sans Frontires stepped in to see if there is any possible violations of human rights at the notorious Company X. They picked one hapless employee and have a group of 14 volunteer nurses measured his systolic blood pressure and obtained the following results
I need assistance testing a hypothesis and identifying the solution/variance, details are included in the attachment. A driving machine was employed to hit a sample of 41 each of two different brands of golf balls using the same force each time. The research team then measured the distance between the point of impact and wher
- Using PHSTat - Send Excel + Paste into Word also * Must write out a NULL & HYPOTHESIS and include BUT WHAT DOES THIS MEAN TO A MANAGER?? See attached file for solution template.
1. In z-score formula as it is used in a hypothesis test a. Explain what is measured by M- µ in the numerator. b. Explain what is measured by the standard error in the denominator. 2. The value of the z-score that is obtained for a hypothesis test in influenced by several factors. Some factors influence that size of the n
1. Whenever your decision is to reject the null hypothesis, there is a risk of a Type I error. True False 2. A Type I error occurs when you conclude that a treatment effect exists, but the treatment has no effect. True False 3. The critical region consists of extreme sample values
Create an equation for which the appropriate test of the statistical hypothesis would require the use of a z-score. (For the population mean for the variable of interest, you may invent a hypothetical population mean for the sake of this equation.) o Clearly identify the independent and dependent variables you would analyze.
See attached: Must use Excel with the PHSTAT add-in, and then paste all into MS Word. The manager of a paint supply store wants to determine whether the amount of paint contained in 1-gallon cans purchased from a nationally known manufacturer actually averages 1gallon. It is known from the manufacturer's specifications that t
Shank's Inc., a nationwide advertising firm, wants to know whether the size of an advertisement and the color of the advertisement make a difference in the response of magazine readers. A random same of readers is shown ads of four different colors and three different sizes. Each reader is asked to give the particular combinatio
Problem. Test scores for class are: 93%, 77%, 90%, 85%, 86%, 81%, 88% At a = .10 can it be said that the standard deviation is greater than 4%. State (1) the null hypothesis (2) determine the critical value (3) determine the test statistic (4) State decision and summary Also, construct the 90% confidence interval for th
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HeatFlux Insulation 271.8 783.35 264 748.45 238.8 684.45 230.7 827.8 251.6 860.45 257.9 875.15 263.9 909.45 266.5 905.55 229.1 756 239.3 769.35 258 793.5 257.6 801.65 267.3 819.65 267 808.55 259.6 774.95 240.4 711.85 227.2 694.85 196 638.1 278.7 774.55 272.3 757.9 267.4 753.35 254.5 704.7 224.7 666.8 181.
The data in the table that follows was collected by a large car manufacturer concerning a new prototype car called the CIELO. Thirty carefully selected respondents were shown the car and fully briefed about its capabilities. Here is the data, which includes age (intervally scaled), sex (nominal), social status (interval scale ra
Managerial Research Design and Analysis. See attached file for full problem description. For all problems, State the H0 and H1. Perform the appropriate test and include your printout. state your conclusion 1. It is hypothesized that the mean for the variable family income in the lawn data set is $50,000. Can this claim
The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in our sample is anywhere from 6 to 12, we shall not reject the null hypothesis that p = 0.6; otherwise, we shall conclude t