Question

A distribution of numbers has the following five-number summary:

10.0, 15.0, 30.9, 50.0, 63.7

True or False? These numbers can be used to calculate the standard deviation of the distribution.

Answer 1

False.

Answer 2

true

Answer 3

find the mean; subtract the mean from each data point; square the results; add them up and divide by the number of data points

Answer 4

and take the sqrt of the final :)

Answer 5

mean = 33.92
sd =abt 20.419

Answer 6

lol ... i did it long hand and came up with the same answers as using the ti83s stuff :) makes me happy

Answer 7

A distribution of numbers has the following five-number summary:

13.7, 24.5, 38.9, 50.0, 73.2

True or False? These numbers can be used to calculate the interquartile range (IQR) of the distribution.

Answer 8

yes ... interquartile range is just loping off the outliers at P{25} and P{75}

Answer 9

so true?

Answer 10

yes, its true .. as long as I am seeing it right

Answer 11

amistre, the 5 number summary is a summary of ANOTHER dataset. it is the min, lower quartile, median, upper quartile, and max. I don't think you can calculate standard deviation from it.

Answer 12

so P{25} is the second number and P{75} is the 4th number.

Answer 13

so the first answer is false and the second is true.

Answer 14

hey could you guys help me understand something like this

Answer 15

2 years ago eh ... 5 number summary makes more sense as stating the quartiles now that i read if 2 years later :)

go ahead and as a new question in the "ask a question" box on the left, there will be many people who are willing to help you understand this stuff in a more uptodate context

Answer 16

it was false