2) Claim: The average income for college students is below $10,000. a) What would the null and alternative hypotheses be for this test? Họ: HA: b) Explain what a Type 1 error would be for this test. c) What would the decision rule for this test be? d) Suppose that a survey of 450 students had an average of $9550 with a standard deviation of $6000. However, the sample data suggests that the population has a distribution that is not normal. What would the p-value be for this test? (Show your work.) e) Given an interpretation of what the p-value means in the context of the problem. f) If a = 0.05, state a conclusion. %3D

2) Claim: The average income for college students is below $10,000. a) What would the null and alternative hypotheses be for this test? Họ: HA: b) Explain what a Type 1 error would be for this test. c) What would the decision rule for this test be? d) Suppose that a survey of 450 students had an average of $9550 with a standard deviation of $6000. However, the sample data suggests that the population has a distribution that is not normal. What would the p-value be for this test? (Show your work.) e) Given an interpretation of what the p-value means in the context of the problem. f) If a = 0.05, state a conclusion. %3D

Name: 2) Claim: The average income for college students is below $10,000.a)
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Description: 2) Claim: The average income for college students is below $10,000.a) What would the null and alternative hypotheses be for this test?Ho:HA:b) Explain what a Type 1 error would be for this test.c) What would the decision rule for this test be?d) Sup

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Answer D And E
According to the Annual Survey of Drug expenditure in country X, the annual expenditure for prescription drugs is $838 per person in the Northeast region of the country. A sample of 60 individuals in the Midwest shows a per person expenditure for prescription drugs of $745. Further, it is given that the population standard deviation of $300. I. Formulate hypotheses for a test to determine whether the sample data support the conclusion that the population annual expenditure for prescription drugs per person is lower in the Midwest than in the Northeast and Identify whether it is a two-tail test or a one-tail test (Left or right tail).II. Decide the suitable test statistics and justify your selection.III. Calculate the value of the relevant test statistics and identify the P-valueIV. Based on the p-value in part (III), at 99% confidence level, decide the decision criteria.V. Make the final conclusion based on the analysis.
A. What is the value of the test statistic for a test with a null hypothesis that mu = 100, Xbar = 110 the standard deviation = 10 and n = 100? B. What is the value of the test statistic for a test with a null hypothesis that mu = 98.6, Xbar = 99.4, the sample standard deviation = 2 and n = 16?
A high school counselor asks a college-bound student to complete a Readiness to Leave Home questionnaire. Among high schoolers, the questionnaire has a mean of 38.61 and a standard deviation of 9.05. The student earns a raw score of 21. Type your response to the following questions directly in Moodle: What is the student’s z score? (you do not need to show the calculation) In 1-2 sentences, what does the Z score tell us about the student's readiness to leave home? (show that you know the definition of a Z score & can apply it to this example) How would you recommend that the guidance counselor work with the student? (1 sentence)
An experiment was run to compare three groups. The sample sizes were 28, 33, and 102, and the corresponding estimated standard deviations were 2.7, 2.6 and 4.8. 1) What is the value of the pooled standard deviation? 2) Explain why the answer for part 1 is much closer to the standard deviation of the third group than to either of the other two standard deviations.
When students use the bus from their dorms, they have an average commute time of 8.263 minutes with standard deviation 2.9321 minutes. Approximately 75.67% of students reported a commute time greater than how many minutes? Assume the distribution is approximately normal. Question 10 options: 1) 6.22 2) 2.28 3) 14.24 4) 10.3 5) We do not have enough information to calculate the value.
In a particular year, registered nurses earned an average annual salary of $52,330. A survey was conducted with 48 nurses from a particular state to determine if the annual salary is higher than $52,330 for that state's nurses. The sample average was $61,599 with a sample standard deviation of $7,489. Conduct a hypothesis test at the 5% level.Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) State the distribution to use for the test. (Enter your answer in the form z or tdf where df is the degrees of freedom.) What is the test statistic? (Round your answer to two decimal places.) What is the p-value? (Round your answer to four decimal places.) Construct a 95% confidence interval for the true mean. Sketch the graph of the situation. Label the point estimate and the lower and upper bounds of the confidence interval. (Round your answers to the…
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An educational researcher claims that the average GPA of graduate students at FIU is less than 3.5 . To test his claim he collected data on 81 graduate students . The sample mean GPA was 3.25 with a standard deviation of 0.3 . What is the conclusion ? Group of answer choices A. Reject the null hypothesis B. Type I error C. Fail to reject the null hypothesis D. Reject the alternative hypothesis
The cost of a car is $30k at Joe's Garage. You cant to see if the cost is lower at Pete's Garage. To test, you collect data from 64 buyers who recently bought cars. The average of your sample is $29,760, with a sample standard deviation of $7,450. Using this data to perform the hypothesis test with H0: u=30,000 vs H0:u<30,000, what is the p-value of this test, and what is the conclusion of this test at the a=.05 level?
Use five-step hypothesis testing for each of the following problems. Number each of the five steps. You may use the traditional method or the p-value method. 1) Science fiction novels average 250 pages in length. The average length of 8 randomly chosen novels written by I. M. Wordy was 265 pages in length with a standard deviation of 35. At are Wordy's novels significantly longer than the average science fiction novel? Use five-step hypothesis testing. 2) The average monthly cell phone bill was reported to be $50.07 by the U.S. Wireless Industry. Random Sampling of a large cell phone company found the following monthly cell phone charges (in dollars): At the 0.01 level of significance, can it be concluded that the average phone bill has…
a) Determine the standard deviation (s) of sunflower heights in the test plot which wasnot fertilized and the Pseudo-Standard deviation (PSD) of sunflower heights in the test plotwhich was fertilized. b) Consider the following three statements A.If the median of X is greater than the mean of X than the distribution of X ispositively skewed. B.For Normal populations the median and the mean are approximately equal. C.The median and the Inter-quartile range are measures of variability in apopulation. c) Consider the following three statements A.The correlation between two positive quantities is always positive. B.If the correlation between X and Y is negative than the slope of the regressionline for predicting Y from X is negative. C.Pearsons correlation coefficient is always between -1 and +1. This is notnecessarily true for Spearmans correlation coefficient