For the items in the table below, you will have two sets of calculations to perform.First, using the split-half method, derive an estimate of reliability using the oddnumbered items versus the even numbered items. You do not need to show yourcalculations, However, indicate the values that you obtained for (1) the sums ofsquares, (2) the sum of products, and (3) and the final reliability estimate as pointswill be allocated for those values. Second, calculate Cronbach's a. Again, you do notneed to show your calculations. However, indicate the values that you obtained for (1)the variances of the items, (2) the variance of the test, and (3) the final value forCronbach's a as points will be allocated for those values.q01245233902335355q03245344q0433424№st4

Given :Calculate Cronbach's .a. Indicate the values that you obtaines for the variances of the…

Answered: For the items in the table below, you…

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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An outdoor hot dog vendor sells an average of 70 hot dogs per day in dry weather and an average of 25 hot dogs in rainy weather. If the weather in this area is rainy 20% if the time, determine the expected number of hot dogs sold per day.
To the Internal Revenue Service (IRS), the reasonableness of total itemized deductions depends on the taxpayer's adjusted gross income. Large deductions, which include charity and medical deductions, are more reasonable for taxpayers with larg given level of income, the chances of an IRS audit are increased. Data (in thousands of dollars) on adjusted gross income and the average or reasonable amount of itemized deductions follow. Adjusted Gross Income Itemized Deductions ($1,000s) 22 ($1,000) 9.6 27 9.6 32 10.1 48 11.1 65 13.5 85 120 15.7 25.5 (a) Develop a scatter diagram for these data with adjusted gross income as the independent variable. 30 25 20 15 10 5 30 25 20 15 10 5+ 30 25- 20- 15- 10- .. 5- 0 20 40 60 80 100 120 140 Adjusted Gross Income ($1,000s) 0 20 40 60 80 100 120 140 0 Adjusted Gross Income ($1,000s) 20 40 60 80 100 120 140 Adjusted Gross Income ($1,000s) 30 25 20 15 10 5- 0 20 40 60 80 100 Adjusted Gross Income ($1,000s) 120 140 G (b) Use the least squares method to…
Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost estimating purposes, managers use two hours of labor time for the planting of a medium- sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours). Select your answer - 2 t Họ:1 H₂H b. Compute the sample mean. (to 2 decimals) c. Compute the sample standard deviation. (to 4 decimals) d. Find the test statistic and p-value. (Use Table 2 in Appendix B.) - Select your answer - 2 ✓ (to 3 decimals) 2.9 3.4 With a 0.05 level of significance, test to see whether the mean tree-planting time differs from two hours. a. State the null and alternative hypotheses. Select your answer - 1.5 v 2.4 1.6 4 2.6 p-value e. What is your conclusion? We Select your answer-reject the null hypothesis. There - Select…
Use the estimate yest=3.3x2 - 9.4x - 0.1 to calculate a set of residuals, using a formula or a calculator. Explain your steps, then create a residual plot using this new model and assess its validity
A magazine collected the ratings for food, decor, service and the cost per person for a sample of 104 restaurants. They combined the ratings to create a summated rating and used that to predict the cost of a restaurant meal. The data are modeled by Yi=−28.781+1.0138Xi, where Xi is the summated ratings and Yi is meal cost. For these data, SYX=8.246, X=61.63, and hi=0.026171 when X=53 A. Construct a 95% confidence interval estimate of the mean cost of a meal for restaurants that have a summated rating of 53. B. Construct a 95% prediction interval of the cost of a meal for an individual restaurant that has a summated rating of 53.
Please solve for A, B, and C
Elaine is interested in determining if men are more satisfied in their jobs than women in the healthcare industry. She administers a job satisfaction questionnaire to 20 men and 20 women working in hospital administration. Her grouping variable is gender and dependent variable is job satisfaction. The job satisfaction scale consists of 8 items measured using a 5-point rating scale. A higher score on this scale would indicate high job satisfaction. The maximum score that can be obtained on the scale is 40. We can assume that job satisfaction scores are normally distributed. Use the appropriate T test with a significance level of 0.05 to test the hypothesis. Research Question Do the mean job satisfaction scores differ for men and women working in the hospital administration department? Hypothesis The mean job satisfaction scores do not differ for men and women working in the hospital administration department. Compute an independent sample t test on these data. Report…
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A magazine collected the ratings for food, decor, service and the cost per person for a sample of 96 restaurants. They combined the ratings to create a summated rating and used that to predict the cost of a restaurant meal. The data are modeled by Y; = - 30.871 + 0.9349X;, where X; is the summated ratings and Y; is meal cost. For these data, Syx = 8.575, X= 61.02, and h; = 0.027122 when X = 52. Complete parts (a) through (c). %3D %3D a. Construct a 90% confidence interval estimate of the mean cost of a meal for restaurants that have a summated rating of 52. |SHYIX =x, 5 (Type integers or decimals. Round to three decimal places as needed. Use ascending order.)

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