The table below shows whether students from a certain University in Pretoria are right- or left- handed by sex. The total number of students who were interviewed was 100. Their responses were as follows: Male Female Total Right handed 38 42 80 Left handed 12 8 20 Total 50 50 100 3.1.1 What is the probability of selecting a left-handed male? 3.1.2 What is the probability of selecting a right-handed female?
The table below shows whether students from a certain University in Pretoria are right- or left- handed by sex. The total number of students who were interviewed was 100. Their responses were
as follows:
|
|
Male |
Female |
Total |
|
Right handed |
38 |
42 |
80 |
|
Left handed |
12 |
8 |
20 |
|
Total |
50 |
50 |
100 |
3.1.1 What is the probability of selecting a left-handed male?
3.1.2 What is the probability of selecting a right-handed female?
3.2 A construction firm has bid on two different contracts. Let B1 be the
3.2.1. Both bids are successful?
3.2.2. Neither bid is successful?
QUESTION FOUR
The following are the variations of ratings of Five Richfield college researchers on the institutions
National Innovative Research Initiative (NIRI) project for the year 2020: RATINGS 3 4 7 10 15 30
Using the data values given above, calculate the following:
4.1.1 Arithmetic mean
4.1.2
toys were drawn from a large production run, 5% were found to be defective. Based on the above, identify the following:
4.2.1 Population of interest
4.2.2 Sample
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