Create histograms and descriptive statistics for variables

Assignment Help Applied Statistics

Reference no: EM132277185

Business Statistics Assignment -

Introduction - Each person will be assigned a data set. If you are working in a team, the team must first decide on which data set they will use. (It must be one of the ones assigned to a team member.) This is a real data set so it will have problems such as missing data and variables that do not meet the criteria for parametric statistical analysis. Students will perform the required calculations and answer the following questions based on that data set. Your answer to each step requiring calculations will often require a manual calculation.

Quiz 1 -

You can use these to develop your answers and then enter them into the quiz. Questions for 2 and 3 will follow shortly.

QUESTION 1 - WHO GETS CREDIT FOR THIS INPUT?

STEP 1 - The data set contains 6 quantitative variables, 1 categorical variable and two factors (Gender and Ranking). The possible variable names are shown below this paragraph. They have no meaning so do not try to base any analysis on what the variable means.

You will have to create histograms and descriptive statistics for the 6 quantitative variables. Do not do statistical analyses on the factors. In this step you must review these descriptive statistics and graphics to decide if you can analyze the data provided. This requires application of the empirical rule. Based on this analysis, you must decide whether or not to use each variable in your analysis. It is expected that you may drop a variable after this step because you do not think it can be analyzed. In order to drop a variable, you must explain why it is a problem in statistical terms. Refer to slides or the book to develop your argument. (You may not drop "Job" or "Looking" and you should not analyze Element, Gender or Rank). For the remaining variables, indicate why you believe they can reasonably be analyzed using descriptive statistics. Look in Chapter 7 regarding the Central Limit Theorem.

QUESTION 2 - WHICH VARIABLE DO YOU THINK SHOULD BE DROPPED?

QUESTION 3 - WHAT IS THE JUSTIFICATION FOR DROPPING THIS VARIABLE?

Step 2 - You must set an alpha for your analyses. This must not be the common ones, .10. .05 or .01. Provide an explanation of your choice and describe the impact it will have on your results in the context of Type I error. (Needless to say, you must also demonstrate an understanding of Type I error.)

QUESTION 4 - WHAT ALPHA DO YOU CHOOSE?

QUESTION 5 - WHAT ARE THE IMPLICATIONS OF CHOOSING THIS ALPHA?

Now, in additional sentences, describe Type II error and provide an explanation of how this will impact your results. Then answer two specific questions:

1. What precaution do we take to acknowledge the fact that we do not have any way to calculate Type II error?

2. What is one thing you can think of that might lower the risk of making a type II error. This is not something in your text. You will have to have an understanding of basic statistical principles and be creative.

QUESTION 6 - WHAT IS MEANT BY TYPE II ERROR?

QUESTION 7 - HOW IS THIS ISSUE DEALT WITH IN BASIC STATISTICS?

Quiz 2 -

Question 1 - Who participated on this team? You can provide 1 to 3 responses.)

Question 2 - Indicate which data set you were assigned and which Alpha level you selected in the first part of the assignment. Indicate the data set first and the alpha second.

Question 3 - The confidence interval of a quantitative variable is centered on the mean and has a margin of error that is added and subtracted to determine the confidence limits for that mean. What is the margin of error for the variable OWL in your data set?

Question 4 - What is the test statistic you needed to use to calculate the previous value?

Question 5 - According to your calculations, what are the upper and lower confidence limits for the variable FOX in your data set? (Answer precision to 3 decimal places, even if those are 0s.) Provide lower limit first, then upper limit. Format should be LL - UL.

Question 6 - Show your calculations for 1 (and only 1) of these two variables: SEAL or MAN. Include the number in the centre of the range, the values used to calculate the confidence interval and the final values. To paste information here, you may have to use CTRL-V.

Question 7 - Can you calculate a confidence interval for "LOOK"?

Question 8 - Justify your last answer.

Question 9 - What is the value in the centre of the confidence interval for LOOK?

Question 10 - What values did you calculate for the confidence limits for LOOK? (Show lower limit first and upper limit second.)

Attachment:- Assignment Files.rar

Reference no: EM132277185

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Reviews

len2277185

4/8/2019 2:39:12 AM

You are allowed to work in teams of 3 people. The data set analyzed MUST BE THE ONE ASSIGNED TO THE TEAM MEMBER WHO ENTERS THE VALUES IN THE QUIZ. THEREFORE, YOU HAVE TO CREATE THE TEAM AND DECIDE WHO WILL ENTER THE DATA BEFORE YOU CAN DETERMINE WHICH DATA SET TO USE. If you submit analysis of another data set the answers programmed into the quiz will be different and you will be marked wrong. If you change who submits after one person has started, that person may not get proper credit.

len2277185

4/8/2019 2:39:06 AM

Questions below parallel the questions in the online quiz where I grade your answers. This year the quiz (like Gaul) is divided into three parts. The first section is common to all data sets. In other words, there are no answers specific to the numbers in the data set you received. There questions specific to your data set but they are graded manually so the quiz does not have to be specific to that data set. This means you can do this section as soon as you have decided who you will work with. An important note is that you DO NOT HAVE TO WORK WITH ANYONE! If you want to do the quiz on your own, that is perfectly fine but you can work with others if you want.

len2277185

4/8/2019 2:38:53 AM

Starting with the second quiz, the numbers asked for are specific to your data set so make sure you choose the correct one. Also, please read the introduction to the quiz carefully because after asking you to choose your alpha, I now set a specific alpha to use for your calculations because it makes scoring easier. Be sure to take this into account before you start the calculations.

len2277185

4/8/2019 2:38:46 AM

The third quiz expects you to calculate the values for specific tests on variables in your data set. There are two reasons for these calculations. First, that you know which evaluation model to use when and second that you can apply the information you have toward making a correct decision. Therefore, you do not have to do the calculations by hand but can use one of two different electronic methods. Both are identified below with a little information. We will also cover this in class. Come see me if you need more help.

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