MATH 221 Entire Course NEWhttp://www.hiqualitytutorials.com/product/math-221-entire-course-statistics-for-decision-making-new/Ended October, 2015.This Course Includes ALL iLabs, Homework, Quizzes, Final Exam, and All Discussions ALL 100% CorrectWeek 3 Quiz - 3 SetsWeek 5 Quiz – 3 SetsWeek 7 Quiz 4 SetsAll Quizzes and Final Exam Include Formulas in Excel and in Word that can be used if a numerical data is different MATH 221 iLab Week 2 http://www.hiqualitytutorials.com/product/math-221-ilab-week-2-statistics-for-decision-devry/Statistical Concepts:

Using Minitab Graphics Shapes of Distributions Descriptive Statistics Empirical Rule

Data in Minitab Minitab is a powerful, yet user-friendly, data analysis software package. You can launch

Minitab by finding the icon and double clicking on it. After a moment you will see two windows, the Session Window in the top half of the screen and the Worksheet or Data Window in the bottom half.

Data have already been formatted and entered into a Minitab worksheet. Go to the eCollege Doc sharing site to download this data file. The names of each variable from the survey are in the first row of the Worksheet. This row has a background color of gray to identify it as the variable names. All other rows of the Minitab Worksheet represent a certain students’ answers to the survey questions. Therefore, the rows are called observations and the columns are called variables. Included with this lab, you will find a code sheet that identifies the correspondence between the variable names and the survey questions.

Complete the questions after the Code Sheet and paste the Graphs from Minitab in the grey areas for question 1 through 3. Type your answers to questions 4 through 11 where noted in the grey areas. When asked for explanations, please give thorough, multi-sentence or paragraph length explanations. The completed iLab Word Document with your responses to the questions will be the ONE and only document submitted to the dropbox. When saving and submitting the document, you are required to use the following format: Last Name_ First Name_Week2iLab.

Code SheetDo NOT answer these questions. The Code Sheet just lists the variables name and the question used by the researchers on the survey instrument that produced the data that are included in the Minitab data file. This is just information. The first question for the lab is after the code sheet….MATH 221 iLab Week 4

http://www.hiqualitytutorials.com/product/math-221-ilab-week-4-statistics-for-decision-devry/Statistical Concepts:

Probability Binomial Probability Distribution

Calculating Binomial Probabilities Open a new MINITAB worksheet. We are interested in a binomial experiment with 10 trials. First, we will make the

probability of a success ¼. Use MINITAB to calculate the probabilities for this distribution. In column C1 enter the word ‘success’ as the variable name (in the shaded cell above row 1. Now in that same column, enter the numbers zero through ten to represent all possibilities for the number of successes. These numbers will end up in rows 1 through 11 in that first column. In column C2 enter the words ‘one fourth’ as the variable name. Pull up Calc > Probability Distributions > Binomial and select the radio button that corresponds to Probability. Enter 10 for the Number of trials: and enter 0.25 for the Event probability:. For the Input column: select ‘success’ and for the Optional storage: select ‘one fourth’. Click the button OK and the probabilities will be displayed in the Worksheet.

Now we will change the probability of a success to ½. In column C3 enter the words ‘one half’ as the variable name. Use similar steps to that given above in order to calculate the probabilities for this column. The only difference is in Event probability: use 0.5.

Finally, we will change the probability of a success to ¾. In column C4 enter the words ‘three fourths’ as the variable name. Again, use similar steps to that given above in order to calculate the probabilities for this column. The only difference is in Event probability: use 0.75.

Plotting the Binomial Probabilities1. Create plots for the three binomial distributions above. Select Graph > Scatter

Plot and Simple then for graph 1 set Y equal to ‘one fourth’ and X to ‘success’ by clicking on the variable name and using the “select” button below the list of variables.  Do this two more times and for graph 2 set Y equal to ‘one half’ and X to ‘success’, and for graph 3 set Y equal to ‘three fourths’ and X to ‘success’.  Paste those three scatter plots below…..

MATH 221 iLab Week 6 http://www.hiqualitytutorials.com/product/math-221-ilab-week-6-statistics-for-decision-devry/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 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

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.MATH 221 Homework Week 1 http://www.hiqualitytutorials.com/product/math-221-homework-week-1-statistics-for-decision/MATH 221 Homework Week 2 http://www.hiqualitytutorials.com/product/math-221-homework-week-2-statistics-for-decision/

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MATH 221 Quiz Week 3 ALL Answers are 100% Correct 3 Setshttp://www.hiqualitytutorials.com/product/math-221-quiz-week-3-statics-for-decision/

These quizzes include formulas in Excel and in Word that can be used if numeric data is different from the one listed belowMATH 221 Quiz Week 5 ALL Answers are 100% Correct 3 Setshttp://www.hiqualitytutorials.com/product/math-221-quiz-week-5-statistics-for-decision/These quizzes include formulas in Excel and in Word that can be used if numeric data is different from the one listed below. MATH 221 Quiz Week 7 with All Formulas ALL Answers are 100% Correct 4 Setshttp://www.hiqualitytutorials.com/product/math-221-quiz-week-7-statistics-for-decision/

These quizzes include formulas in Excel and in Word that can be used if numeric data is different from the one listed below.MATH 221Final Exam with ALL Formulas ALL Answers are 100% Correct.http://www.hiqualitytutorials.com/product/math-221-final-exam-statistics-for-decision-devry/This exam includes formulas in Word and in Excel, which can be used if numeric data is different from the one listed below.MATH 221 Discussions Week 1-7 All Posts 542 Pages 2 Setshttp://www.hiqualitytutorials.com/product/math-221-discussions-week-1-7/MATH 221 Descriptive Statistics Discussions Week 1 All Post 75 Pages http://www.hiqualitytutorials.com/product/math-221-descriptive-statistics-discussions-week-1/If you were given a large data set such as the sales over the last year of our top 1,000 customers, what might you be able to do with this data? What might be the benefits of describing the data?...MATH 221 Regression Discussions Week 2 All Posts 79 Pages http://www.hiqualitytutorials.com/product/math-221-regression-discussions-week-2/Suppose you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information that you have. Your boss has asked you to put together a report showing the relationship between these two variables. What could you present and why?...MATH 221 Statistics in the News Discussions Week 3 All Posts 78 Pages http://www.hiqualitytutorials.com/product/math-221-statistics-in-the-news-discussions-week-3/Keep your eyes and ears open as you read or listen to the news this week. Find/discover an example of statistics in the news to discuss the following statement that represents one of the objectives of statistics analysis: “Statistics helps us make decisions based on data analysis.” Briefly discuss how the news item or article meets this objective. Cite your references….MATH 221 Discrete Probability Variables Discussions Week 4 All Post 79 Pages http://www.hiqualitytutorials.com/product/math-221-discrete-probability-variables-discussions-week-4/What are examples of variables that follow a binomial probability distribution? What are examples of variables that follow a Poisson distribution? When might you use a geometric probability?  Give an example of a continuous random variable and a discrete random variable. Explain your answer….MATH 221 Interpreting Normal Distributions Discussions Week 5 All Posts 82 Pages http://www.hiqualitytutorials.com/product/math-221-interpreting-normal-distributions-discussions-week-5/

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not? What's a normal distribution?...MATH 221 Confidence Interval Concepts Discussions Week 6 All Posts 72 Pages http://www.hiqualitytutorials.com/product/math-221-confidence-interval-concepts-discussions-week-6/Consider the formula used for any confidence interval and the elements included in that formula. What happens to the confidence interval if you (a) increase the confidence level, (b) increase the sample size, or (c) increase the margin of error? Only consider one of these changes at a time. Explain your answer with words and by referencing the formula….MATH 221 Rejection Region Discussions Week 7 All Posts 77 Pages http://www.hiqualitytutorials.com/product/math-221-rejection-region-discussions-week-7/How is the rejection region defined and how is that related to the z-score and the p value? When do you reject or fail to reject the null hypothesis? Why do you think statisticians are asked to complete hypothesis testing? Can you think of examples in courts, in medicine, or in your area?...