Case Study Chapter 2 Elementary Statistics The following data set shows prices of 50 college textbooks in a community college bookstore, rounded to...
The following data set shows prices of 50 college textbooks in a community college bookstore, rounded to the
Answer the following questions based on this data.
You must show all work and formulas used, including
labels on final answers, in order to receive full credit.
Round decimals to three places
unless otherwise noted
Make a frequency distribution to organize your data using five classes.
Below is a template that you can use
for your frequency distribution. [One of the columns is for a tally column, which you may omit if you do not
Using information from your frequency distribution in question 1, estimate the
sample mean of the frequency
to find the average price of a textbook.
You can use the table below to setup the appropriate
columns needed to compute the
sample mean for a frequency distribution
You do not need to recopy all of
the columns in the original frequency distribution; you only need to recopy the variables needed to calculate
the mean of a frequency distribution along with showing the extra column(s) needed for this formula.
round the mean to the nearest whole number
through conventional rounding
Again using information from your frequency distribution in question 1, estimate the
deviation of the frequency distribution
You should be using the rounded mean
you have just found in
question 2 in your calculations here.
A template is provided below to use to show your calculations needed
to solve the formula.
You do not need to recopy all of the columns in the original frequency distribution;
you only need to recopy the variables needed to calculate the standard deviation of a frequency distribution
along with showing the extra columns needed for this formula. (12 points)
Find the correlation coefficient for the data from the frequency distribution in question 1, using the
midpoints from the frequency distribution as the x variable and the frequencies as the y variable.
is provided below to create your columns and find their sums to use in the formula.
Determine what type of
correlation the data has.
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