Problem 4: Please use the paired difference test to solve this problem given the following conditions (5 points).
Employee # |
Before (1) |
After (2) |
Difference Di |
1 |
8 |
11 |
|
2 |
7 |
5 |
|
3 |
11 |
19 |
Employee # | Before (1) | After (2) | Difference Di | Di - Mean | ^2 of Di-Mean |
1 | 8 | 11 | -3 | 0 | 0 |
2 | 7 | 5 | 2 | 5 | 25 |
3 | 11 | 19 | -8 | -5 | 25 |
Total | -9 | 50 |
mean difference ¯d = -9 / 3
= -3
standard deviation of the differences sd = 50/3 = 16.667 = = 4.082
standard error of the mean difference, SE( ¯d) = sd / √n
= 4.082 / √3
= 2.357
t-statistic T = ¯d / SE( ¯d)
= 3 / 2.357
= 1.273
Problem 4: Please use the paired difference test to solve this problem given the following conditions...
Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is μd = 0. Compute the value of the t test statistic. Round intermediate calculations to four decimal places as needed and final answers to three decimal places as needed. A farmer has decided to use a new additive to grow his crops. He divided his farm into 10 plots and kept records of the corn yield (in...
19 2. sole [6] 2. Solve by the Hungarian/Munkries method the following assignment problem given by the table below. Job 1 Job 2 Job 3 Job 4 Job 5 Worker 1 $8 $7 Worker 2 $7 $5 $3 $8 Worker 3 $4 Worker 4 $7 $6 $3 $8 $6 Worker 5 $9 $3 $9 $8 $6 $3 $11 $4
Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an unabraded (U) condition and an abraded (A) condition Use the paired t test to test Ho: HD 0 versus Ha: HD> 0 at significance level 0.01. (Use μD-4-A.) Note: The data below is formatted such that you can copy and paste it into R. Fabric 4 u=c( 36.5, 55.0, 51.5, 38.6, 43.2, 48.8, 25.6, 49.7) A-c28.5,20.0, 46.0, 34.0, 36.5,52.5, 26.5,46.5) 1 2 3 5...
solve the problem using the Finite-Difference Method. use these conditions: L=2m, h1 = 20 and h2 = 10 A flat plate (k-1 W/m-K, p 2 kg/m3, c 0.7 kJ/kg-K) separates two fluids with different temperatures and convection coefficients. Heat conduction in the plate can be considered one-dimensional. The initial temperature of the plate is uniform and equal to 30 °C. a) Select the problem parameters using the table below. b) Cover the domain with a grid and write the finite...
10-38. You are given the following results of a paired difference test: d =-4.6 d0.25 n=16 CHAPTER 10 a. Construct and interpret a 99% confidence interval estimate for the paired difference in mean values. b. Construct and interpret a 90% confidence interval estimate for the paired difference in mean values.
c. Run a two-sample paired t-test for means to test your hypothesis, using a confidence level of 95%. To show whether it is a one-tail test or a two-tail test, highlight the significant values in the Excel output, including your p-value, critical t, and t stat. and write a sentence or two to interpret the results. should the null hypothesis be rejected? In EXCEL PLEASE TABLE C9-2: Wife and Husband Feedback Scores on 1-7 Scale + Same Day or Not...
s. QUESTION 2 Use minitab Suppose a sample of 20 students were given a diagnostic test before studying a particular module and then again after completing the module. We want to find out if, in general, our teaching leads to improvements in students' knowledge/skills (i.e. test scores). We can use the results from our sample of students to draw conclusions about the impact of this module in general. 92.MPJ 1) check assumption (fort show your correct 3) find the t-value...
Use minitab if possible. If it is, please show step by step process of how you did it. To estimate efficiency of a drug for weight loss, the clinical trial was performed. The results are presented in the table below. Patient number Weight before trial, kg Weight after trial, kg 1 85.0 83.5 2 79.6 78.1 3 75.0 73.2 4 76.4 74.0 5 91 90.2 6 89.3 87.0 7 82.4 79.9 8 81.5 78.5 9 67.4 64.0 10 68.1 65.1...
Please use a two tailed test and a= .05 for all tests One-sample t-test A researcher was interested in examining the effect of exercise on happiness levels among college students. The average college student happiness levels is u = 30. A sample of 5 individuals was selected and asked to exercise for three weeks. And then, they were asked to report their happiness scores. Can he conclude that exercise influences happiness levels ? Happiness 37 32 33 36 32 1)...
Question 19 4 pts Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is ud = 0. Compute the value of the t test statistic. Round final answer to three decimal places as needed. 9 5 7 3 12 7 S 6 O t = 0.578 O t= 1.292 Ot=2.890 O t= 0.415