1.Collect 30+ numerical data values and list them all. Example, select one baseball player from each team and record their salary.10 points. 2.Describe step by step how you collected your datain Step 1and name the type of sampling used (systematic-stratified-cluster-random)10 points. 3.Using your data, calculate the mean, median, mode, range, and standard deviation of the […]
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Evaluate A= mean+ -kxStandard deviation and B= mean -kxStandard deviation. Use the function COUNTIFS to count the number of data points that are between A and B and see whetherbthis agrees with Chebyshev’s theory). For part b) see whether your results agree with the empirical rule – 68-95-99.7% rule for k=1,2,and 3( This is not in our text but I discussed it in one of our meetings.
The following is your project (worth 10% of grade): Generate 200 random integers between 1 and 9999 a) verify Chebyshev’s Theorem (pages 135 –137 text for k=1.5,2,3 b) determine whether these data is normal or approxinmately normally distributed Justify your decision. This project should be no more than 2-4 pages ( if you use Excel […]
Explain the coefficient test result. Is the null hypothesis rejected? What does that mean?
Q1. Perform and Interpret a Bivariate Linear Regression (9 points total) Q1Q2 data set contains cognitive function scores and demographics from a group of older adults. The focus of this question set is the executive function (Executive). Create an SPSS data file by importing the Q1Q2 data. Configure the “measure” for each variable. A . […]
Explain What is the population of people? Where and how are you going to collect your sample? Does your sample accurately represent your population? Why or why not?
To study about the relationship between height and the weight, you need to collect a sample of nine (9) people using a systematic sampling method. What is the population of people? Where and how are you going to collect your sample? Does your sample accurately represent your population? Why or why not? Collect the sample […]
Suppose that the amount of time teenagers spend on the Internet is normally distributed, with a standard deviation of 1.5 hours. A sample of 100 teenagers is selected at random, and the sample mean is computed as 6.5 hours. Determine the 99% confidence interval estimate of the population mean.
Question 1 A survey of 100 retailers revealed that the mean after-tax profit was $80 000. Assuming that the population standard deviation is $15 000, determine the 95% confidence interval estimate of the mean after-tax profit for all retailers. Question 2 Suppose that the amount of time teenagers spend on the Internet is normally distributed, […]
Six people from different occupations were interviewed for a survey, and their annual salaries were as follows: $12,000, $20,000, $25,000, $37,000, $67,000, and $125,000. What is the mean annual salary for the six people?
Class Information folder. These problems are also due Wednesday, October 7 by 11:00 am. NO late papers will be graded. TEST 2 PART 2: Each part counts 3 points. Solve and answer each problem. 29. Six people from different occupations were interviewed for a survey, and their annual salaries were as follows: $12,000, $20,000, $25,000, […]
Is the company’s claimed mean inside your confidence interval?Explain.
For this Assignment, you are working at a firm that conducts independent testing for heavy industry. Recently, an automobile manufacturer has been in the news for complaints about the highway gas mileage of their latest model minivan. You receive a contract from a consumer action group to test and write a report on the company’s […]
Would you prefer to use the mean or the medians this dataset’s measure of central tendency? Why?
Respond to the following in a minimum of 175 words: The most frequently used measures of central tendency for quantitative data are the mean and the median. The following table shows civil service examination scores from 24 applicants to law enforcement jobs: 83 74 85 79 82 67 78 70 18 93 64 27 93 […]
Discuss the importance of constructing confidence intervals for the population mean.
Discuss the importance of constructing confidence intervals for the population mean. What are confidence intervals? What is a point estimate? What is the best point estimate for the population mean? Explain. Why do we need confidence intervals? Based on your selected topic, evaluate the following: Find the best point estimate of the population mean. Construct […]
