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Devry MATH221 week 6 ilab

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Question;Statistics ? Lab #6;Name;Statistical Concepts;?;Data Simulation;?;Discrete Probability Distribution;?;Confidence Intervals;Calculations for a set of;variables;? Open the class;survey results that were entered into the MINITAB worksheet.;? We want to;calculate the mean for the 10 rolls of the die for each student in the class. Label;the column next to die10 in the Worksheet with the word mean. Pull up Calc >;Row Statistics and select the radio-button corresponding to Mean. For Input variables:enter all 10 rows of the die data. Go to the Store result in: and select the mean column. Click OK and the mean for each observation will show up in the Worksheet.;? We also want to;calculate the median for the 10 rolls of the die. Label the next column in;the Worksheet with the word median.;Repeat the above steps but select the radio-button that corresponds to Median and in the Store results in: text area, place the median column.;Calculating Descriptive;Statistics;? Calculate;descriptive statistics for the mean and median columns that where created;above. Pull up Stat > Basic;Statistics > Display Descriptive Statistics and set Variables: to mean and median. The output will show up in your;Session Window. Print this information.;Calculating Confidence;Intervals for one Variable;? Open the class;survey results that were entered into the MINITAB worksheet.;? We are interested;in calculating a 95% confidence interval for the hours of sleep a student gets.;Pull up Stat > Basic Statistics >;1-Sample t and set Samples in;columns: to Sleep. Click the OK;button and the results will appear in your Session Window.;? We are also;interested in the same analysis with a 99% confidence interval. Use the same;steps except select the Options;button and change the Confidence level;to 99.;Short Answer Writing;Assignment;All answers should be;complete sentences.;1.;When rolling a die, is this an example of a discrete;or continuous random variable? Explain your reasoning.;2.;Calculate the mean and standard deviation of the;probability distribution created by rolling a die. Either show work or explain;how your answer was calculated.;Mean;Standard;deviation;3.;Give the mean for the mean column of the Worksheet.;Is this estimate centered about the parameter of interest (the parameter of;interest is the answer for the mean in question 2)?;4.;Give the mean for the median column of the;Worksheet. Is this estimate centered about the parameter of interest (the;parameter of interest is the answer for the mean in question 2)?;5.;Give the standard deviation for the mean and median;column. Compare these and be sure to identify which has the least variability?;6.;Based on questions 3, 4, and 5 is the mean or median;a better estimate for the parameter of interest? Explain your reasoning.;7.;Give and interpret the 95% confidence interval for;the hours of sleep a student gets.;8.;Give and interpret the 99% confidence interval for;the hours of sleep a student gets.;9.;Compare the 95% and 99% confidence intervals for the;hours of sleep a student gets. Explain the difference between these intervals;and why this difference occurs.

 

Paper#60510 | Written in 18-Jul-2015

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