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At the beginning of the course of Statistical Methods I, the instructor recommended that students devote 3 hours per week for the duration of the 13-week semester, for a total of 39 hours. It is known that the time spent on studying statistics follow a normal distribution. Throughout the course duration, students were claiming that they were following the instructor's recommendation. At the course completion, a random sample of 10 students enrolled in the course was drawn where each student was asked how many hours he or she spent doing homework in statistics. The data are listed below:
45
38
37
40
44
46
42
43
Calculate the sample mean and sample standard deviation.
Determine the values of mean M and standard deviation s for original sample?
Use this information to compute a 95% confidence interval for average number of credit cards carried by students.
Estimating a linear regression equation to predict the future values of the dependent variable Y.
The grade point averages for 10 randomly selected high school students are listed below. Assume the grade point averages are normally distributed.
Hagger Engineering Corporation is considering undertaking several proposed projects for the next fiscal year. The projects, the number of engineers and the number of support personnel necessary for each project.
To sketch the 3-sigma X-bar chart and R-chart parameters. A candy bar manufacturer desires to set up a variables control chart for the net weight of its candy bars.
Determine a 95 percent confidence interval for the population mean.
Beta and required rate of return stock has required return of 11%; risk-free rate is 7%t; and market risk premium is 4 %. Determine the stock's beta?
Given sample data arranged in a frequency distribution table. Use Excel to calculate the sample mean and variance from this data set.
We code middle-aged Americans as 1 and senior citizens as 0, the logistic regression model for senior citizens
Using the 0.95 degree of confidence, what is the interval estimate for the population proportion (to the nearest tenth of a percent)?
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
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