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incorrect stats questions.docx


This document has incorrect answers highlighted in yellow and a not in red below the incorrect problem.  You must show your work and also either provide a link to a calculator or provide formula in an Excel.

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Most of the problems are completed correctly. Please look at anything that is highlighted in yellow with a comment in red below it. ( )( X Y ( )2 ( )2 ) -1 1 7 2 18 -7 49 15 = 4 30 1 9 5 40 3 28 1 5 -2 1 -16 2 3 125 3 sy = 4 15 0 10 = 25 sx = 1 5 256 4 225 0 9 540 32 30 0 74 1.581 r= PLEASE SHOW WORK AND LINK IF YOU USED A CALCULATOR OR Sy= and for r= [The following information applies to the questions displayed below.] The following information is available. H0: μ = 57 H1: μ ≠ 57 The sample mean is 53, and the sample size is 33. The population standard deviation is 6. Use the .05 significance level. 1. award: 2 out of 2.00 points Is this a one- or two-tailed test? One-tailed test Two-tailed test eBook Links (3) Multiple Learning Objective: 10-05 Distinguish between Learning Objective: 10-07 Choice Difficulty: Medium a one-tailed and a two-tailed test of hypothesis. Compute and interpret a pvalue. Learning Objective: 10-06 Conduct a test of hypothesis about a population mean. 2. award: 2 out of 2.00 points What is the decision rule? Reject H0 if -1.96 < z < 1.96 Reject H0 if z < -1.96 or z > 1.96 eBook Links (3) Multiple Choice Difficulty: Medium Learning Objective: 10-07 Learning Objective: 10-05 Distinguish between Compute and interpret a pa one-tailed and a two-tailed test of hypothesis. value. Learning Objective: 10-06 Conduct a test of hypothesis about a population mean. 3. award: 2 out of 2.00 points What is the value of the test statistic? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Value of the test statistic eBook Links (3) Worksheet Difficulty: Medium 4. award: 2 out of 2.00 points -3.83 Learning Objective: 10-07 Learning Objective: 10-05 Distinguish between Compute and interpret a pa one-tailed and a two-tailed test of hypothesis. value. Learning Objective: 10-06 Conduct a test of hypothesis about a population mean. What is your decision regarding H0? Fail to reject H0 Reject H0 eBook Links (3) Multiple Choice Difficulty: Medium Learning Objective: 10-07 Learning Objective: 10-05 Distinguish between Compute and interpret a pa one-tailed and a two-tailed test of hypothesis. value. Learning Objective: 10-06 Conduct a test of hypothesis about a population mean. 5. award: 0 out of 2.00 points What is the p-value? (Round z value to 2 decimal places and final answer to 4 decimal places.) p-value .9999 PLEASE SHOW WORK AND A LINK TO CALCULATOR OF p-value 6. award: 12 out of 16.00 points A sample of 39 observations is selected from a normal population. The sample mean is 28, and the population standard deviation is 4. Conduct the following test of hypothesis using the .05 significance level. H0 : μ ≤ 26 H1 : μ > 26 (a)Is this a one- or two-tailed test? "One-tailed"-the alternate hypothesis is greater than direction. (b)What is the decision rule? (Round your answer to 2 decimal places.) Reject H0 and do not reject H1 when z > 1.68 please show work and link to calculator What is the value of the test statistic? (Round your answer to 2 decimal (c) places.) Value of the test statistic 3.12 (d)What is your decision regarding H0? Reject There is sufficient greater than 26. evidence to conclude that the population mean is (e)What is the p-value? (Round your answer to 4 decimal places.) .0017 please show work and link to calculator award: 8 out of 10.00 points At the time she was hired as a server at the Grumney Family Restaurant, Beth Brigden was told, “You can average $83 a day in tips.” Assume the population of daily tips is normally distributed with a standard deviation of $4.07. Over the first 45 days she was employed at the restaurant, the mean daily amount of her tips was $84.86. At the .05 significance level, can Ms. Brigden conclude that her daily tips average more than $83? (a)State the null hypothesis and the alternate hypothesis. H0:μ ≤ 83 ; H1: μ > 83 (b)State the decision rule. Reject H0 if z > 1.65 (c) Compute the value of the test statistic. (Round your answer to 2 decimal places.) Value of the test statistic 3.07 (d)What is your decision regarding H0 ? Reject H0 (e)What is the p-value? (Round your answer to 4 decimal places.) p-value .9981 Please show work and a link to calculator
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