Question

5 The probabilities of a boy passing English and Mathematics tests are a and b respectively. Find the probability of the boy failing both tests.
1-(a+b)+ab
1-(a+b)-ab
1-(a+b)
1-(a-b)-ab
6 Statistics is a descriptive measurement obtained from a ----------------
observation
sample
experiment
population
7 The grade of student on six examinations were 84, 91, 72, 68, 87, and 78. What is the arithmetic mean of the grades?
88
60
70
80
8 The scores of 5 students in an examination are: 6, 5, 8, 7 and 4. Find the variance.
3
2
2.5
4.5
9 The scientific method for collection, summarization, presentation, analysis and interpretation of data is called
statistics
investigation
biostatistics
questionairing
10 A ............. is the total collection of all the possible outcomes of an experiment
Sample space
Sample
Experiment
Statistics