1 STAT-116 002 Test 1 F2023 Name: _______________________________ Score: _____________ /25 The first 3 problems are multiple choice questions worth 1 point
each. Circle
the answer (only one) closest to yours. 1.
Cindy wishes to describe the centre or
the typical value
of the distribution of the BC Assessment values of 2-
bedroom condos in the city of Victoria. She obtained a sample which has some outliers. Which of the following statistics is the most appropriate
to use? A) the mean B) the median C) the sample standard deviation D) the IQR 2.
Suppose there are 38
students in STAT 218 B01. The 11
females’ average rent is $
1040
/month and the 27
males’ average rent is $
948
/month. The overall total (sum) and average of the monthly rent for this class are: A) (sum, average) = (37036, 975) B) (sum, average) = (37036, 994) C) (sum, average) = (1988, 975) D) (sum, average) = (1988, 994)) 3.
“
Emily wishes to estimate the percentage of Camosun classes use Open Source textbooks. She first divides the College by program, then randomly selects 3 classes from each program to find out if they use Open Source textbooks.
” The sampling technique used in the description is A)
Simple Random Sampling B)
Stratified Sampling C)
Cluster Sampling D)
Multi-stage Sampling 4.
The following are the costs of internet services for 7 randomly selected households in Saanich, after sorted in an increasing order: 62 71 83 89 112 118 125 Complete the following parts based on these sample data points given above. a.
(7 points) Compute the following sample statistics (keep one decimal): Mean= _______________, Median =________________, Q1 = ________________, Q3 = _______________, IQR= ______________ Sample Standard deviation = __________________, Sample Variance = __________________ b.
(2 points) Is “
62
” a
low outlier? Use the 1.5(IQR) rule to justify your answer.
