Namibia Car Dealers wants to determine the number of defects per
new car. Suppose you are asked to conduct the quality survey for
cars, suppose you sampled 30 new cars and following data on number
of defects per car were recorded.
0
1
1
2
1
0
2
3
2
1
0
4
3
1
1
0
2
0
0
2
3
0
2
0
2
0
3
1
0
2
a) Compute the sample mean number of defects per car
[2]
b) Compute the sample standard deviation
[5]
c) Compute the standard error of mean, assuming that ?̅ and s are
equal to ? and ? respectively
[2]
d) Compute the probability that number of defects per car more than
1.5
[5]
e) Draw the distribution in d.
[3]
f) Compute the probability that that number of defects per is
between 1 and 2
[5]
g) Draw the distribution in d.
[3]
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