PROJECT PART B: Hypothesis Testing and Confidence Intervals Math-533 Applied Managerial Statistics Prof. Jeffrey Frakes December 8‚ 2014 Jared D Stock A.) The average (mean) annual income was greater than $45‚000 Null Hypothesis: The average (mean) annual income is greater than or equal to $45‚000. Ho: u > $45‚000 Alternative Hypothesis: The average (mean) annual income was less than $45‚000 Ha: u < $45‚000 I will use a = .05 as the significance level‚ and observing the
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Chapter10 1. In an experiment involving matched pairs‚ a sample of 15 pairs of observations is collected. The degree of freedom for the t statistic is 14. true 2. In testing the difference between two means from two independent populations‚ the sample sizes do not have to be equal to be able to use the Z statistic. true 3. In testing the difference between the means of two independent populations‚ if neither population is normally distributed‚ then the sampling distribution of the difference in means
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squares total was 100. The sum of squares due to the treatments was 40. a. Set up the null hypothesis and the alternate hypothesis. b. What is the decision rule? Use the .05 significance level. c. Complete the ANOVA table. What is the value of F? d. What is your decision regarding the null hypothesis? SS 100 SST 40 SSE 60 k 3 n 15 null hypothesis Variance of one population equals the others alternate The variances differ k-1
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1) Conduct a hypothesis test for each sample at the .01 level of significance and determine what action‚ if any‚ should be taken. Provide the test statistic and the p-value for each test. At 0.01 level of significance │Zᾳ/2 │ = 2.58 Reject Ho when │Z│> │Zᾳ/2 │ Sample 1 Sample 2 Sample 3 Sample 4 SAMPLE MEAN 11.958 12.028 11.889 12.081 POPULATION MEAN 12 12 12 12 SAMPLE STANDARD DEVIATION 0.22 0.22 0.20 0.20 SAMPLE SIZE 30 30 30 30 Z -1.028 0.712 -2.935 2.161 RESULT ACCEPT ACCEPT REJECT ACCEPT
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the null hypothesis. This suggests that there is a difference in the control and treatment groups. 2. State the null hypothesis for the Baird and Sands (2004) study that focuses on the effect of the GI with PMR treatment on patients’ mobility level. Should the null hypothesis be rejected for the difference between the two groups in change in mobility scores over 12 weeks? Provide a rationale for your answer. Answer: Again the p- value is less than 0.05 and therefor the null hypothesis can be rejected
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being able to analyze and interpret the data that has been collected. This paper will provide the null and alternative hypothesis‚ explain the hypothesis testing procedure used‚ describe the results of that test‚ and explain how those results will answer the team’s previously stated research question. Null and Alternative Hypotheses Forming the null and alternative hypothesis is an important part of statistics. Looking at housing data set provided by the text (Lind‚ Marchal‚ & Wathen‚ 2011)
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May 13‚ 13 Gerald Heidt Learning Team Reflection This week‚ we were introduced to the null and alternative hypothesizes. In doing this we were given examples of how to compare two populations by using confidence intervals in order to test the hypothesis. Team A was also introduced to how we can apply these methods to problems more applicable to our professional careers‚ when two population means‚ population proportions‚ or population variances‚ need to be compared. In learning new material‚ there
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Confidence Intervals and Hypothesis Testing Name: Math 256‚ Nelson 1. A soft-drink machine is regulated so that the amount of drink dispensed is approximately normally distributed with a standard deviation equal to 1.5 deciliters. Find a 95% confidence interval for the mean of all drinks dispensed by this machine if a random sample of 36 drinks had an average content of 2.25 dl. 2. The heights of a random sample of 50 college students showed a mean of 174.5 centimeters. Assume the
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HIGHER COLLEGES OF TECHNOLOGY ABU DHABI MEN’S COLLEGE CIS 2003 Assessment 4 – Group Project Programme Name: Bachelor Degree Course Code and Name: CIS 2003 Time Allowed: ( 3 Weeks ) Assessment Number: 4 LO/Goals Covered by this Assessment: 1‚2‚3‚4‚5 Special Instructions: Read the entire Project. No Outside Help is Allowed You are Not Permitted to work with anyone else‚ Inside or Outside the College on the Project‚ other than your fellow group members It must be the Groups Original
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good way to advertise. d) Most of the population in Brasov believes that internet advertising is aggressive. e) A big part of the population in Brasov would decide to purchase a product‚ following an Internet advertising campaign. II.2. Statistical Assumptions H0: At least 55% of the interviewed consider that Internet advertising is invasive. H1: Less than 55% of the interviewed consider that Internet advertising is invasive. H0: Up to 65% of people from Brasov believe that the Internet
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