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Hypothesis Testing

Statistical Test Data and Critical Values

You are interested in ratings of cell phone service by 5 different carriers. 10 people rate each of the five carriers. The data that you collect is the number of people who rated each of the services favorably and the number of people that rated each of these services unfavorably. Which test would be appropriate to use in thi

Hypothesis Testing by the Wall Street Journal

The wall street journal reported 28% of people who bank online have cut back on their internet use. A credit union's manager is certain that while internet use may be down, it is much less than 28% of its customers. They are convinced that at most 10% of their customers have reduced their internet banking transactions. the cr

Hypothesis Testing Business Applications

Please help with the following problem. A major issue facing many states is whether to legalize casino gambling. Suppose the govenor of one state believes that more than 55% of the state's registered voters would favor some form of legal casino gambling. However before backing a proposal to allow such gambling, the govenor

Hypothesis Testing in Business Applications

A major issue facing many states is whether to legalize casino gambling. Suppose the Governor of one state believes that more than 55% of the state's registered voters would favor some form of legal casino gambling. However, before backing a proposal to allow such a gambling, the Governor has instructed his aides to conduct a

Hypothesis Testing

The director of a state agency believes that the average starting salary for clerical employees in the state is less than $30,000 per year. To test her hypothesis, she collected a simple random sample of 100 starting clerical salaries from across the state and found that the sample mean is $29,750. 1: State the appropriate n

Hypothesis Testing for Relevant Critical Values

Provide the relevant critical value for each of the following circumstances: 1: HA: μ > 13, n = 15, σ = 10.3, Level of Significance = 0.05 2: HA: μ =/ 21, n = 23, s = 35.40, Level of Significance = 0.02

Mean salary of accountants

Is the mean salary of accountants who have reached partnership status higher than that for accountants who are not partners? A sample of 15 accountants who have the partnership status showed a mean salary of $82,000 with a standard deviation of $5,500. A sample of 12 accountants who were not partners showed a mean of $78,000 wi

Statistics - Verbal Hypothesis

A) Research Problem: Are students spending less time in studies now (in 2009) than they did in 2002? (B) Research Problem: Are males spending less time in studies now (in 2009) than they did in 2002 as compared to females now (in 2009) than they did in 2002?

Test value (test statistic) for a hypothesis test

At a certain university, the average cost of books per student was $400 per student last semester. In a sample of 40 students this semester, their average cost was $430 with a standard deviation of $80. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?

Two Sample Hypothesis Test: Pay and Age

Develop one business research question from which you will formulate a research hypothesis that will test two populations. Prepare a 1,050-1,750-word paper describing the results of a hypothesis test of two populations. Be sure to include the following in your paper: a. Formulate both a numerical and verbal hypothesis stat

Numerical and Verbal Hypothesis Statements

Identify a research issue, problem, or opportunity that uses data that has absolute zero measurements and ratio level data. Create a paper that describes the results of a hypothesis test on your selected research issue, problem, or opportunity. Begin by describing your selection. Then, formulate both a numerical and verbal h

Hypothesis Testing for a Pancake Recipe

Can a hypothesis test on a recipe for making pancakes from the recipe on the back of the Bisquick box. Should it be based on the number of pancakes it says the recipe could make? For example, it would say that it yields 14 pancakes. Will the recipe yield the 14 pancakes it claims it will? or If the correct amount of pan

Hypothesis Statements and Significance Levels

How might one know if an error was made in accepting or rejecting the null hypothesis? Do you suppose the nature of the research has an influence on the selection of the significance level? Why or why not? Why might it be important to state the decision rule when it may be clear in step 1 -the hypothesis statements?

Statistics

A local bottling company has determined the number of machine breakdowns per month and their respective probabilities as shown below: Number of Breakdowns Probability 0 0.12 1 0.38 2 0.25 3 0.18 4 0.07 ____ 1. Refer to Exhibit 1-1. The expected number of machine breakdowns per month is a. 2 b. 1.70 c. one, since i

P-value for the hypothesis test

For a sample of 12 items from a normally distributed population for which the standard deviation is s=17.0, the sample mean is 230.8. At the 0.05 level of significance, test Ho:µ<= 220 versus H1:µ>220. Determine and interpret the p-value for the test.

Writing the Null and Alternative Hypothesis

Using statistical terms explain, what does "individual packages of cereal may weigh slightly more or less than the marked weight due to normal variation incurred with high speed packaging machines, but each day's production of cereal will average slightly above the marked weight." Also explain is words a hypothesis test for chec

One sample hypothesis testing for M&M experiments

Using the data derived from the M&M experiment in class develop one research question from which you will formulate a research hypothesis. prepare a 350-700words paper describing the results of a hypothesis test of one population mean or population proportion. be sure to include the following in your paper a. formulate bo

Hypothesis Testing: The Speed of Service Time

A restaurant claims that its speed of service time is less than 18 minutes. A random selection of 36 service times was collected, and their mean was calculated to be 17.1 minutes. Their standard deviation is 3.1 minutes. Is there enough evidence to support the claim at alpha = .08. Perform an appropriate hypothesis test, showing

Testing One Variable's Data

Perform hypothesis testing on one variable's data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by formulating a null and an alternative statement, choosing an acceptable significance value, determining the appropriate critical value, selecting the test statistic and determining its value from the sample d

A Hypothesis Test for a Single Population Mean

Please conduct a hypothesis test for a single population mean of a quantitative variable equal to a given number. For example, test the hypothesis that the population mean of the intrinsic is equal to 5 or not. Use all 25 data rows. Since n<30, use a t statistic. For this and any hypothesis test, number the five steps

Positive Association of Flights

A regional commuter airline selected a random sample of 25 flights and found that the correlation between the number of passengers and the total weight, in pounds, of luggage stored in the luggage compartment is 0.94. Using the .05 significance level, can we conclude that there is a positive association between the two variables

Five step hypothesis testing

1) What are the five steps involved in classic hypothesis testing? 2) In general, what is a "Critical Value" or "Cut-Off Score" of a test statistic? What are the critical values of z for a two-tailed test (.05)? What are the critical values of z for a one-tailed test (.05)? What are the critical values of z for a two-

Test statistic for a test of hypothesis

A random sample of 51 observations was selected from a normally distributed population. The sample mean was x = 88.6 , and the sample variance was s2 = 38.2. We wish to determine if there is sufficient reason to conclude that the population standard deviation is not equal to 8 at the 0.05 level of significance. Calculate the

Determining Sizes for Two Independent Samples

If two independent samples are used in a hypothesis test concerning the difference between population means for which the combined degrees of freedom is 20, which of the following could not be true about the sample sizes n1 and n2? A) n1=12 and n2=8 B) n1=12 and n2=10 C) n1=13 and n2=9 D) Cannot be determined from the given

Writing Null and Alternate Hypothesis

Which of the following would be the hypothesis for testing the claim that the proportion of students at a large university who smoke is significantly different from 0.15? A) H o: p = 1.5, H a: p > 1.5 B) H o: p = 1.5, H a: p is not equal to 1.5 C) H o: p > 1.5, H a: p = 1.5 D) H o: p < 1.5, H a: p > 1.5.

The "Compute" Function

Use the "compute" function (transform - compute)in SPSS to get "difference of the average response between A variable and B variable". What should I enter in numerical expression in Compute to answer this question?

Hypothesis Testing for Variable Data

Perform hypothesis testing on one variable's data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by formulating a null and an alternative statement, choosing an acceptable significance value, determining the appropriate critical value, selecting the test statistic and determining its value from the sample d

The Mean Waist Size for Males

To test the null hypothesis that the mean waist size for males under 40 years equals 34 inches versus the hypothesis that the mean differs from 34, the following data were collected: 33, 33, 30, 34, 34, 40, 35, 35, 32, 38, 34, 32, 35, 32, 32, 34, 36, 30. Calculate the t* -value of the test statistic. State the null hypoth