Question

For the question (2), please a. Formulate the null and alternative hypotheses. b. Calculate the expected...

For the question (2), please a. Formulate the null and alternative hypotheses. b. Calculate the expected results for the hypothesis test assuming the null hypothesis is true and determine the hypothesis test model. c. Label the diagram with mean, level of significance, reject and fail to reject area. d. Formulate the decision rule. e. Use the experimental outcome to determine the conclusion. f. Answer the question addressed in the problem. (2) The IRS claims that the mean amount of time it takes to transfer tax information from a tax return to a computer record is 35 minutes. Before they will invest into a new system, they decide to do a test run to determine if the new system is significantly better than the present system. Four hundred tax returns are randomly selected and the data is transferred using the new system. The mean amount of time it takes to transfer the data from a tax return to a computer record is 34.3 minutes with standard deviation of 4.2 minutes. Based upon this sample result should the IRS invest in the new system? (use level of significant at 5%) *please show all work

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
3) The IRS claims that the mean amount of time it takes to transfer information to...
3) The IRS claims that the mean amount of time it takes to transfer information to a computer record is 15 minutes. Before they will invest in a new system they decide to do a test run to determine if the new system is faster than the present one. 25 tax returns are randomly selected and transferred using the new system. The mean time for transfer is 14.3 minutes, with standard deviation 4.2 minutes. At a level of significance of...
a) Identify the claim: state the null and alternative hypotheses. b) Determine the test: left-tailed, right-tailed,...
a) Identify the claim: state the null and alternative hypotheses. b) Determine the test: left-tailed, right-tailed, or two-tailed. c) Identify the degree of freedom and determine the critical value. d) Graph your bell-shaped curve and label the critical value. e) Find your standardized test statistic ? and label it on your graph. f) Decide whether to reject or fail to reject the null hypothesis. g) Interpret your result. A dealership projected that the mean waiting time at a dealership is...
a. Please state both the null and alternative hypotheses for this question. b. Provide the decision...
a. Please state both the null and alternative hypotheses for this question. b. Provide the decision rule for making this decision. Use an alpha level of .05. c. Show all the work necessary to calculate the appropriate statistic. d. What conclusion are you allowed to draw? Write a conclusions sentence in APA format (i.e., it includes the appropriate statistical information). In a study of the effectiveness of an antipsychotic drug, patients treated with the drug were compared to patients receiving...
a. Please state both the null and alternative hypotheses for this question. b. Provide the decision...
a. Please state both the null and alternative hypotheses for this question. b. Provide the decision rule for making this decision. Use an alpha level of .05. c. Show all of the work necessary to calculate the appropriate statistic. d. What conclusion are you allowed to draw? Write a conclusions sentence in APA format (i.e., it includes the appropriate statistical information). At a state university, the student population is approximately one- third male and two-thirds female. Over a two-day period...
1) For each problem, state the null and alternative hypotheses, calculate the critical value(s) of the...
1) For each problem, state the null and alternative hypotheses, calculate the critical value(s) of the statistic by which you would reject the null hypothesis and state whether or not you would reject the null hypothesis for a level α specified by each problem. If the hypothesis test requires an unpaired t-test, then you may assume that the population variances are equal. Then calculate the appropriate statistic value by hand and use the appropriate probability table to obtain the exact...
I. State null and alternative hypotheses. II. Decide on the significance level, α. III. Compute the...
I. State null and alternative hypotheses. II. Decide on the significance level, α. III. Compute the value of the test statistic. IV. Determine a p-value, P. V. If P ≤ α reject H0, otherwise do not reject H0. VI. Interpret the result of the hypothesis test. 6. A biologist was interested in determining whether specific seedlings treated with a new fertilizer resulted in a higher than average height than the standard height of 11.2 cm. The biologist treated a random...
I. State null and alternative hypotheses. II. Decide on the significance level, α. III. Compute the...
I. State null and alternative hypotheses. II. Decide on the significance level, α. III. Compute the value of the test statistic. IV. Determine the critical value(s). V. If the value of the test statistic falls in the rejection region, reject H0. VI. Interpret the result of the hypothesis test. Question: . A manufacturer claims that the thickness of the spearmint gum it produces is 7.5 one-hundredths of an inch. A quality control specialist regularly checks this claim. On one production...
a) Identify the claim: state the null and alternative hypotheses. b) Determine the test: left-tailed, right-tailed,...
a) Identify the claim: state the null and alternative hypotheses. b) Determine the test: left-tailed, right-tailed, or two-tailed. c) Graph your bell-shaped curve and label your levels of significance or critical value. d) Find your standardized test statistic ? and label it on your graph. e) Decide whether to reject or fail to reject the null hypothesis. f) Interpret your result. A study was conducted to determine if the salaries of elementary school teachers from two neighboring states were equal....
Q1. State the null and alternative hypotheses. A customer service center claims the mean time a...
Q1. State the null and alternative hypotheses. A customer service center claims the mean time a customer is "on hold" is less than 2 minutes. (a) H0: μ = 2 H1: μ < 2 (b) H0: μ < 2 H1: μ = 2 (c) H0: μ = 2 H1: μ > 2 (d) H0: μ > 2 H1: μ = 2 Q2. You are testing the claim that the mean cost of a new car is more than $25,200. How...
The director of research and development is testing a new drug. She wants to know if...
The director of research and development is testing a new drug. She wants to know if there is evidence at the 0.01 level that the drug stays in the system for more than 327 minutes. For a sample of 67 patients, the mean time the drug stayed in the system was 330 minutes. Assume the population variance is known to be 529. Determine the test-z and make a decision to reject or fail to reject the null hypothesis.