# statistics review interactive

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Category: Education

## Presentation Description

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## Presentation Transcript

### Slide 1:

Review of some concepts from Chapters 4 through 6 Probability Discrete Distributions Normal Distribution Statistics Review

### Slide 2:

Proceed to the next slide, by clicking the button below, to start the first question. You will answer a series of questions. Click on the answer you believe to be correct. If you need help click on the question. It will direct you to a website where you can find the answer. If you answer correctly, click the next button and you will proceed to the next question. If you answer incorrectly, click the back button to try again. Enjoy! Instructions

### Question 1 :

Question 1 For a normal distribution, the spread of the curve decreases and its height increases as: A. The ratio of the mean and standard deviation increases B. The sample size decreases C. The mean increases D. The standard deviation decreases

### Sorry… :

Sorry… You chose the wrong answer! Please return to the previous slide and click the hyperlinked question to try to find the correct answer. When finished searching the website, try again!

### That is Correct!!! :

That is Correct!!! Nice work. You sure know your stuff! For a normal distribution, the spread of the curve decreases and its height increases as the standard deviation decreases. Click on the NEXT button below to move to the next question. Keep up the good work!

### Question 2 :

Question 2 For a continuous random variable x, the total area under the probability distribution curve is always: A. Equal to 1 B. Greater than 1 C. In the range zero to 1 D. Less than 1

### Ooooopsey… :

Ooooopsey… You better think harder! Please return to the previous slide and click the hyperlinked question to try to find the correct answer. When finished searching the website, try again!

### That is Correct!!! :

That is Correct!!! You are super duper! For a continuous random variable x, the total area under the probability distribution curve is always equal to 1. Click on the NEXT button below to move to the next question. Keep up the good work!

### Question 3 :

Question 3 According to a survey, 70% of adults believe that all college students should be required to perform community service to graduate. Assume that this percentage is true for the current population of all adults. Let x be the number of adults in a random sample of 12 who believe that all college students should be required to perform community service to graduate. What is the mean of x? A. 4.80 B. 8.40 C. 7.20 D. 3.50

### Yowsers! :

Yowsers! You chose the wrong answer! Please return to the previous slide and click the hyperlinked question to try to find the correct answer. When finished searching the website, try again!

### That is Correct!!! :

That is Correct!!! You are super duper! This is a binomial distribution since you have two outcomes. The mean of a binomial distribution is given by multiply the same size, n, by the probability of success, p. Thus, we have n*p = 12(.70) = 8.4 Click on the NEXT button below to move to the next question. You are doing an awesome job!

### Question 4 :

Question 4 Two households are randomly selected and it is observed whether or not each of them owns a telephone answering machine. The total number of outcomes for this experiment is: A. six B. eight C. two D. four

### Uh oh! :

Uh oh! No way! You better think harder! Please return to the previous slide and click the hyperlinked question to try to find the correct answer. When finished searching the website, try again!

### That is Correct!!! :

That is Correct!!! You are awesome! The total number of outcomes for this experiment is 4. You are selecting 2 people and each have 2 outcomes (yes or no), therefore by the counting rule, 2 * 2 = 4 outcomes. Click on the NEXT button below to move to the next question. Way to go!

### Question 5 :

Question 5 An ice cream shop offers 20 flavors of ice cream. How many ways are there to select 2 different flavors from these 20 flavors? A. 50 B. 190 C. 625 D. 300

### Nope! :

Nope! Better luck next time. Please return to the previous slide and click the hyperlinked question to try to find the correct answer. When finished searching the website, try again!

### That is Correct!!! :

That is Correct!!! Very nice! The total number of combinations is found from nCr = 20C2 = 20!/(18! * 2!) = 20 * 19/ 2* 1 = 190. You have finished your quiz! Click the next button to see the acknowledgements. Great Work! r

### Acknowledgments :

Acknowledgments http://www-stat.stanford.edu/~naras/jsm/NormalDensity/NormalDensity.html http://www.visualstatistics.net/023%20Statistical%20Distributions/Normal%20DistributioPropertiesn.htm http://stattrek.com/Lesson2/Binomial.aspx http://www.andrews.edu/~calkins/math/webtexts/prod02.htm http://www.mathwords.com/c/combination_formula.htm