The number of fire calls in a day at a fire department is recorded for 100 randomly selected days. The data is summarized as below: (i) (ii) Number of calls 0 1 2 3 4 5 6 Total 15 20 17 21 9 10 8 100 Number of days What is a reasonable probability model for this data? Test if this model adequately describes the data. Use a = 0.01.

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(a)
(b)
The number of fire calls in a day at a fire department is recorded for 100 randomly
selected days. The data is summarized as below:
(i)
(ii)
Number of calls 0 1 2 3 4 5 6 Total
Number of days 15 20 17 21 9 10 8 100
What is a reasonable probability model for this data?
Test if this model adequately describes the data. Use a = 0.01.
An experiment is designed to study the side effects of two drugs used as
treatments for a certain ailment. A group of 180 subjects are randomly assigned to
three groups. After the specified drug is given, the side effects are recorded.
Side Effects
None
Minor
Major
Total
ΣΣΥ = 5,000
Drug A Drug B
40
36
16
16
4
60
8
60
Placebo
30
24
6
60
Total
106
56
18
180
Is there evidence of a difference among the drugs? Test at the 0.10 level of
significance.
Transcribed Image Text:(a) (b) The number of fire calls in a day at a fire department is recorded for 100 randomly selected days. The data is summarized as below: (i) (ii) Number of calls 0 1 2 3 4 5 6 Total Number of days 15 20 17 21 9 10 8 100 What is a reasonable probability model for this data? Test if this model adequately describes the data. Use a = 0.01. An experiment is designed to study the side effects of two drugs used as treatments for a certain ailment. A group of 180 subjects are randomly assigned to three groups. After the specified drug is given, the side effects are recorded. Side Effects None Minor Major Total ΣΣΥ = 5,000 Drug A Drug B 40 36 16 16 4 60 8 60 Placebo 30 24 6 60 Total 106 56 18 180 Is there evidence of a difference among the drugs? Test at the 0.10 level of significance.
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