See attached files. 9. The state department of education is interested the length of time it takes students to graduate. As part of the study the department manager wants to determine whether the proportion of all female students graduating in 5 years or less ( out of all females who graduate) is significantly different from
Please show all the work for each problem. Chapter Questions 2. Describe what is measured by the estimated standard error I the bottom of the independent -measures t statistics? 20. Harris, Schoen, and Hensley (1992) conducted a research study showing how cultural experiences can influence memory. They prese
The mean income per person in the United States is $41,500, and the distribution of incomes follows a normal distribution. A random sample of 10 residents of Wilmington, Delaware, had a mean of $47,500 with a standard deviation of $10,600. At the .01 level of significance, is that enough evidence to conclude that residents of Wi
According to the National Institute for Occupational Safety and Health, job stress poses a major threat to the health of workers. A national survey of restaurant employees found that 75% said that job stress had a negative impact on their personal lives. A sample of 100 employees of a restaurant chain finds that 68 answer Yes
Hypothesis Testing of Mean: Evidence that executive blood pressures differ from the national average
Do middle-aged male executives have different average blood pressure than the general population? The National Center for Health Statistics reports that the mean systolic pressure for males ages 35 to 44 is 128 and the standard deviation of this population is 15. The medical director of a company looks at the medical records of
The presence of harmful insects in farm fields is detected by erecting boards covered with a sticky substance and then examining the insects trapped on the board. To investigate which colors are most attractive to cereal leaf beetles, researchers placed six boards of each of four colors in a field of oats. The data is listed bel
The Computer Anxiety Rating Scale (CARS) measures an individual's level of computer anxiety, on a scale from 20 ( no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business students. One of the objectives of the study was to determine whether there is a difference between th
A national sales manager of an automobile supply chain claims that monthly sales of auto parts at on of the district office are an average of $5,285. The district manager believes the amount is too high. They authorize you to settle the dispute. You take a simple random sample (n=25) of the sales receipts over the last three yea
32. What probability value would be needed to complete the following probability distribution? x -5 -1 0 1 4 P(x) 0.13 0.25 0.12 0.30 25. An apartment building has the following apartments: 1 bedroom 2 bedroom 3 bedroom 1st floor 3 1 1 2nd floor 2 2 2 3rd floor 1 4 1 If an apartment is selected at random, what is
How do you classify statistical findings in order of power: nominal, ordinal, interval, and ratio? Give example by making up values. Use example of Rancidity values in Rice Bran. Thanks
31. A new weight-watching company, Weight Reducers International, advertises that those who join will lose, on the average, 10 pounds the first two weeks with a standard deviation of 2.8 pounds. A random sample of 50 people who joined the new weight reduction program revealed the mean loss to be 9 pounds. At the .05 level of
Please see attachment. Show step by step solution.
4. Explain why a t distribution tends to be flatter and more spread out than the normal distribution. 12. Last fall a sample of n = 36 freshman was selected to participate in a new four hour training program designed to improve study skills. To evaluate the effectiveness of the new program, the sample was compared with t
Thirty anorexic girls were treated with cognitive behavioral therapy (CBT). They were weighed before and after the treatment. The weight gains, which are positive scores, and weight losses, which are negative scores, are given below. A gain of more than zero pounds would confirm whether the treatment worked. Did the group gain more than zero pounds? Data: 1.7 0.7 -0.1 -0.7 -3.5 14.9 3.5 17.1 -7.6 1.6 11.7 6.1 1.1 -4.0 20.9 -9.1 2.1 -1.4 1.4 -0.3 -3.7 -0.8 2.4 12.6 1.9 3.9 0.1 15.4 -0.7 0 Report the appropriate null and research hypotheses and the critical value (alpha = 0.05). In addition, provide your statistical conclusion, including calculation of test statistic, in the APA format and conceptual conclusion in one to two sentences.
Thirty anorexic girls were treated with cognitive behavioral therapy (CBT). They were weighed before and after the treatment. The weight gains, which are positive scores, and weight losses, which are negative scores, are given below. A gain of more than zero pounds would confirm whether the treatment worked. Did the group gain m
Describe under what circumstances a parametric test is not applicable and a nonparametric test has to be done
Describe under what circumstances a parametric test is not applicable and a nonparametric test has to be done.
1. A random sample of size 81 is taken from a large population, measuring the time it takes to complete a driver's license examination. The sample mean was found to be 43 minutes, and the sample standard deviation 5.71 minutes. Construct a 95% confidence interval around the sample mean. Be sure to show whether you use the t- or
Part-I: Perform regression analysis to answer the following questions: 1) Is spirituality a detminant of ethics in the work place? 2) Is religiosity (intrinsic & extrinsic) a determinant of ethics in the work place? Part-II: Demonstrate an analysis of variance and a two population hypothesis test on the given data.
The table below summarizes the fate of the passengers and crew. A common rule of the sea is that when a ship is threatened with sinking, women and children are the first to be saved. Fate of passengers and crew on the Titanic: ____________________________________________________________ Men
Callaway Golf is one of the leading golf equipment manufacturers in the United States. The company's R&D department has created three new golf ball designs (GB1, GB2 and GB3) that result in reduced air drag and thereby increase driving distance. The company currently has three distinct brands of driver clubs: FX1, FX2 and FX3.
See data file attached. You are the research director at the golf magazine 'Golf Central'. Your magazine decides to test three different brands of 3-iron golf clubs and rate the three brands with regards to the distance. You randomly recruit 5 golfers to test each of the three brands of 3-iron clubs. Each golfer uses all thr
The financial data file is attached but you need spss to open the file. Data analysis for a financial services company. There are three different Investment Plans that the company could offer to its customers . You are asked to find out if the expected revenue from marketing any one of these plans is different from the other
Please solve the exercise below and show your work. A recent study conducted by the state government attempts to determine whether the voting public supports further increase in cigarette taxes. The opinion poll recently sampled 1500 voting age citizens. 1020 of the sampled citizens were in favour of an increase in cigarette
In an opinion survey, a random sample of 1000 adults from the U.S.A and 1000 adults from Germany were asked whether they supported the death penalty. 590 American adults and 560 German adults indicated that they supported the death penalty. The researcher wants to know if there is sufficient evidence to conclude that the pro
Please choose the correct answers and write briefly why: For a given multiple regression model with three independent variables, the value of the adjusted multiple coefficient of determination is _________ less than R2. a. Always b. Sometimes c. Never d. Can be greater or less depending on the standard error
See attached file for proper format. Please solve the exercise below in Excel and show your work (and formulas) 1. At α =..05 and .10, test the hypothesis that the proportion of Consumer (CON) industry companies winter quarter profit growth is more than 2% greater than the proportion of Banking (BKG) companies winter
Restaurateur Danny Valentine is evaluating two, sites, Raymondville and Rosenber, for his next restaurant. Denny suspects that Raymondville residents (population 1) dine out more often (number of times per month) than Rosenberg residents (population 2). Denny commissions a market survey to test his hypothesis. The market
Please select the correct answer and explain briefly why: 1. In order to test the effectiveness of a drug called XZR designed to reduce cholesterol levels, 20 heart patients' cholesterol levels are measured before they are given the drug. The same 20 patients use XZR for two continuous months. After two months of continuous u
Please help me with this problem: Sixteen juvenile rats were treated with the drug Naloxone (pairs 1,3,7,8) or, as a placebo control, Saline (pairs 2,4,5,6) and then observed for their play and non-play behavior in an open field for 1.5 minutes. The goal of the research was to test the idea that the inhibition of endogenous o
TEST #1 Intrinsic by gender Perform the following two-tailed hypothesis test, using a .05 significance level: - State the null and an alternate statement for the test - Use Microsoft Excel (Data Analysis Tools) to process your data and run the appropriate test. Copy and paste the results of the output to your report in Mic
Please solve the exercise below and show your work in Excel (and formulas). In an early study, researchers at an Ivy University found that 33% of the freshmen had received at least one A in their first semester. Administrators are concerned that grade inflation has caused this percentage to increase. In a more recent study, o