2. SPSS computation and Interpretation (T-test): Use the "2009FinalExamData1_OnlineSurveyResponses.sav" file. This data set consists of 96 MBA students' perception/attitude toward social media usage. You should find the variable definition by clicking the SPSS "Variable View" for details. A researcher (let's call this indivi
The purpose of the present study conducted by Eidelman et al. (1991) was to identify the nature of lung destruction in cigarette smokers before the development of marked emphysema. Three destructive index measurements were made on the lungs of lifelong nonsmokers and smokers who died suddenly outside the hospital of nonrespiato
Hello. I have finished all of my homework except for this one question. I need step-by-step solutions for this problem, so that I can do the other questions like this in future homework assignments. A machine is designed to fill jars with 16 ounces of coffee. A consumer suspects that the machine is not filling the jars comple
Hello. I am doing my homework assignment and I cannot figure out and understand how to solve some of the problems. I have answered the questions that I am able to, but I cannot answer the other ones no matter how hard I have tried. Can you PLEASE include step-by-step instuctions on how to solve the problems. If I get behind with
Calculate the "t" value for independent groups for the following data using the formula provided in the attached word document. Using the raw measurement data presented, determine whether or not there exists a statistically significant difference between the salaries of female and male human resource managers using the appropr
Robyn is the Vice President for Human Resources for a large manufacturing company. In recent years she has noticed an increase in absenteeism that she thinks is related to the general health of the employees. Four years ago, in an attempt to improve the situation, she began a fitness program in which employees exercise during
A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The Traffic Department claims that a modification in the type of light will reduce these accidents. The county commissioners have agreed to a proposed experiment. Eight intersections were chosen at random, an
The amount of income spent on housing is an important component of the cost of living. The total costs of housing for homeowners might include mortgage payments, property taxes, and utility costs (water, heat, electricity). An economist selected a sample of 20 homeowners in New England and then calculated these total housing cos
Ketsia is the fitness coordinator at the local youth center. She has found a program that proports to help teens lose weight if they complete the course. A random sample of five recent participants showed that the following weights before and after completing the course. At the .05 significance level, can we conclude that the pa
The null hypothesis is that the mean price paid by younger customers (µ1) will not be as high as the price paid by older customers (µ2). The alternative hypothesis is that younger customers spend more on average than their older counterparts. Do a two sample test. 1. Perform the five-step hypothesis test on the data.
Mathmatical Hypotheses statements, decision rules, sample proporations, z test statistic, p-value, etc.
Chapter 10 Exercises 10.40 A sample of high school seniors showed that 18 of 60 who owned PlayStation 3 spent more than an hour a day playing games, compared with 32 of 80 who owned Xbox 360. Is there a significant difference in the population proportions at α = .10? 10.47 Has the cost to outsource a standard employee
Twenty students randomly assigned to an experimental group receive an instructional program; 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test (with an estimated population standard deviation of 3); the control group has a mean of 35 (with
The amount of time a bank teller spends with each customer is normally distributed with a mean of 3.10 minutes and a standard deviation of 0.40 minutes. (Use the z table) If a random sample of 16 customers is selected from the bank, what is the probability that the average time spent per customer will be at least 3 minutes?
Mitigating barriers to black employment through affirmative action regulations: a case study Ward Thomas The review of black political economy Winter 2000 Affirmative action regulation as a public policy to mitigate racial inequality in the labor market has been under political attack in recent years. During the 1980's, th
Imagine that research shows the average age of people who buy lottery tickets to be 70 with a standard deviation of 12. A sample of 30 individuals from Hawaii is selected and their ages are recorded as shown below. At a = 0.05 is there enough evidence to state that the average age of ticket buyers is the same in Hawaii as it is
An Excel Spreadsheet is reprinted below. Interpret the t-test results. Are they statistically significant? t-Test: Paired Two Sample for Means Beer Soda Variable 1 Variable 2 Mean 16.83333333 15.8
The managers in a company's East and West regions were rated on the basis of the company's evaluation system. A researcher wishes to conduct a t-test of means to determine if there is a difference between the East and West regions. Perform this calculation. Region Manager Rating Region Manager
Marks) A firm is studying the production times for two production methods. The firm is satisfied with production method A and is prepared to continue using it if the mean delivery time is the same as or less than for production method B. However, if the firm finds that the mean delivery time for method B is less than that for
Please see attached problem. -------------------------------- Ralston Enterprises has assets that will have a market value in one year as shown below: Probability 1% 6% 24% 38% 24% 6% 1% Value ($ million) 70 80 90 100 110 120 130 That is, there is a 1% chance the assets will be worth $70 million, a 6% chance the assets
From a population of cereal boxes marked "12 ounces," a sample of 16 boxes is selected and the contents of each box weighed. The sample revealed a mean of 11.7 ounces with a standard deviation of 0.8. Test to see if the mean of the population is at least 12 ounces. Use a 0.05 level of significance. (may use traditional or p-
Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking-even if they are not exposed to the usual pattern of sunlight. To test this notion, eight paid volunteers were placed (individua
Evolutionary theories often emphases that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking - even if they are not exposed to the usual pattern of sunlight. To test this notion, eight paid volunteers were placed (indivi
Consider the following results for two samples randomly taken from two populations. Sample A Sample B Sample Size 150 150 Sample Mean 412 405 Sample Std Deviation 128 54 A. At a .01 level of significance, test whether the
The mean (m) number of employee absences in company X is 6 days annually, according to previous studies conducted by the Human Resources Department. Five years have passed without determining whether this mean continues to be the same. Therefore, the company's industrial psychologist selects a sample of 9 employees and deter
Using 19 observations on each variable, a computer program generated the following multiple regression model: y = 43.7 - 1.83x_1 - 4.25x_2 If the standard errors of the coefficients of the independent variables are, respectively, 1.24 and 2.04, can you conclude that the independent variable is needed in the regression m
Two new york designs are under consideration for possible adoption in an assembly plant. A time study is conducted with 10 workers using design 1, and 12 workers using design 2. The means and standard deviation of their assembly times in minutes are below. Design 1 Design 2 Mean 78.3 minute
1. Outline the difference between the t test for independent groups and the t test for matched groups. 2. A researcher computed the F ratio for a four-group experiment.The computed F is 4.86. The degrees of freedom are 3 for the numerator and 16 for the denominator. a. Is the computed value of f significant at p <.05? Exp
Past records suggest that the mean annual income,m1 , of teachers in state of Connecticut is less than or equal to the mean annual income,m2 , of teachers in California. In a current study, a random sample of 25 teachers from Connecticut and an independent random sample of 25 teachers from California have been asked to report t
You want to compare differences in sales dollars (DV) for 43 employees before and after they have attended a motivational seminar. Since comparing differences is the goal, I presume that you are going to compare the means of a pre-post test of the 43 employees. Okay, I was going to say that this is the answer but lets be hon
Can independent and dependent variables be interchangeable? Why or why not?