# Ilab Week 6 Math 221

**Topics:**Statistics, Normal distribution, Standard deviation

**Pages:**4 (805 words)

**Published:**September 1, 2012

iLab Week 6

Statistical Concepts:

* Data Simulation

* Discrete Probability Distribution

* Confidence Intervals

Calculations for a set of variables

MeanMedian

3.23.5

4.55.0

3.74.0

3.73.0

3.13.5

3.63.5

3.13.0

3.63.0

3.84.0

2.62.0

4.34.0

3.53.5

3.33.5

4.14.5

4.25.0

2.92.5

3.54.0

3.73.5

3.53.0

3.34.0

Calculating Descriptive Statistics

Descriptive Statistics: Mean, Median

Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximum Mean 20 0 3.560 0.106 0.476 2.600 3.225 3.550 3.775 4.500 Median 20 0 3.600 0.169 0.754 2.000 3.000 3.500 4.000 5.000

Calculating Confidence Intervals for one Variable

One-Sample T: Sleep

Variable N Mean StDev SE Mean 95% CI

Sleep 20 6.950 1.572 0.352 (6.214, 7.686)

One-Sample T: Sleep

Variable N Mean StDev SE Mean 99% CI

Sleep 20 6.950 1.572 0.352 (5.944, 7.956)

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.

It is a discrete random variable because the values of the variable is 1 of the 6 values in the set (1,2,3,4,5,6), Since this set is infinite, the random variable is discrete.|

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.

Descriptive Statistics: Die1 Variable Mean StDevDie1 3.450 1.317Mean: 3.50Standard deviation: 1.317Calculations were derived by using the minitab and going into the Stat > Basic Statistics > Display Descriptive Statistics > Variables than select the C14 (Die1) > below enter the statistics and check mark only mean and standard deviation > enter OK twice than you get the answer for the mean and...

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