Stats3

Q1:

Assigned Problem 1:  Perform a categorical analysis on fees for this sample of mutual funds. Describe your findings 

Assigned Problem 2:  Create a frequency distribution and a histogram of the NAV’s.  Use eight classes of data.  Edit the graph to make it professional looking.  Describe your findings 

Assigned Problem 3:  Compute the descriptive statistics for the 1-year return of the mutual funds.   Describe your findings 

Q2

Assigned Problem 1:  Create a pivot table (also known as crosstabulation or a contingency table) of Race and Low Birth Weight on Excel so you can answer the following:

1. What is the probability of randomly choosing a Black woman?


2. What is the probability of randomly choosing a White woman AND a Low birth weight?


3. What is the probability of randomly choosing a Black woman OR a Low birth weight?


4. Given that the mother you selected is a White, what is the probability she had Low birth weight?


5. Given that the mother had Low birth weight, what is the probability she is Black?

Assigned Problem 2:  Let us assume that the Low_Birth_Weight. is a random sample from the Concordia Hospital in 2018.  We are given that the mean birth weight is approximately 6.5 pounds with a standard deviation of 1.6 pounds.  Note: The national standard is that a birth weight below 5.5 pounds is low.  Using Microsoft Excel compute the following:

1. What is the probability of a low birth weight (< 5.5 pounds) occurring at Concordia?


2. What is the probability of a birth weight being above the national average of 7.5 pounds?


3. What is the probability of a birth weight being between 5 and 6 pounds?


4. The bottom 10% of births by weight are below what weight?

Q3

Assigned Problem 1:  First compute the mean total weight and standard deviation of the garbage disposed each week by the sample.  Then, compute the 95% confidence interval of the mean total garbage disposed of in a week on Concordia St.  Describe your findings.

Assigned Problem 2:  First compute the proportion of homes in the sample that recycle.  Then, compute the 95% confidence interval of the proportion of homes on Concordia St. that recycle.    Describe your findings.

Assigned Problem 3:  You wish to learn the average number of pounds of garbage disposed of in a week by the people on Concordia St. within two pounds.  Using the standard deviation from problem 1 as an estimate, how large of a sample should you obtain?

Assigned Problem 4:  You wish to learn the proportion of homes on Concordia St. that recycle within 10% of the true population proportion and be 99% confident of the results.  How large of a sample should you obtain?