# statistic homework 7

The students in a statistics class have the following majors: a) Make a frequency distribution for this data.

b) Make a relative frequency distribution for this data. Include relative percentages on this table.

{32, 40, 52, 23, 39}

a) Find the mean of this sample.

b) Find the median.

c) Find the mode of this set.

2. Consider the following set of data:
{21,32,21,15,80,84,90,78}

a) Find the mean of this sample.

b) Find the median.

c) Find the mode of this set.

3. Consider the following data:
323 412 380 401 280 301 317 440 297 371 353 394
427 399 375 438 329 309 361 340

a) Find the 60th and 70th percentile of this data.

b) Find the quartiles for this data.

4. Consider the following data:
{17, 14, 20, 18, 11}

a) Find the sample mean of this data.

b) Find the range of this data.

c) Find the sample standard deviation of this data.

d) Find the coefficient of variation.

Given a data point x, what does the z-score tell us about x?

2. Suppose that you have a set of data that has a mean of 34 and a standard deviation of 6.

a) Is the point 28 above, below, or the same as the mean. How many standard deviations is 28 from the mean.