In: Statistics and Probability
A social scientist measures the number of minutes (per day) that a small hypothetical population of college students spends online.
Student | Score | Student | Score |
---|---|---|---|
A | 87 | F | 99 |
B | 75 | G | 31 |
C | 93 | H | 87 |
D | 96 | I | 93 |
E | 58 | J | 84 |
(a) What is the range of data in this population?
min
(b) What is the IQR of data in this population?
min
(c) What is the SIQR of data in this population?
min
(d) What is the population variance?
(e) What is the population standard deviation? (Round your answer
to two decimal places.)
min
(a)
(b)
IQR = Q3 - Q1 = 93.75 - 70.75 = 23
(c)
SIQR = IQR/2 = 23/2 = 11.5
(d)
Formula for population variance is :
We get :
(e)
population standard deviation :