Elementary Statistics

• the residents

• the officers

• the mailman

Identify the sampling method:

A quality control inspector at a computer assembly plant needs to estimate the number of defective computers in a group of 250 computers. He tests 25 randomly chosen computers

• simple random

• cluster

• stratified

• convenience

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.
This is a form of:

• Cluster Sampling

• Systematic Sampling

• Stratified Sampling

• Simple Random Sampling

A poll about favorite sports is taken from 100 seniors in a high school where the senior class has 575 students. 23% of respondents said that baseball was their favorite sport.
The "575" is the ______

• Sample Size

• Population Size

• Statistic

• Parameter

Classify each of the following data as quantitative or qualitative

-number of computers in the school

• quantitative

• qualitative

Find the median, mode and range: 
3, 5, 7, 9, 11, 8, 3

• median:7  mode:3  range:7

• median:6  mode:3  range:7

• median:7  mode:3  range:8

• A

• B

• C

• D

A box plot has been drawn to show the heights of some petunia seedlings, in centimetres. Find the interquartile range.

• 6

• 11

• 7

• 8

Order the dot plots from least to greatest standard deviation.

• A, D, C, B

• B, C, D, A

• A, D, B, C

• B, C, A, D

• between the minimum and the first quartile.

• between the first quartile and the median.

• between the median and the third quartile.

• between the third quartile and the maximum.