Solution :
= 178 x 0.48
= 85.44
≈ 85
= 427 x 0.38
= 162.26
≈ 162
a). Yes, the sample sizes are large enough to use the large sample confidence interval so as to estimate the difference in the population proportions.
Let
Where the the age group and the 2 - subscript indicates the age group.
Since
are all at least 10, the sample sizes are large enough to use the large sample confidence interval.
= 0.409421
= 1 - 0.4094
= 0.5906
b). 90% confidence interval is
c). Zero is not included in the confidence interval. Answer is no. The difference in the two population proportion are different from each other.
2 way table
cola water milk total
boy 12 4 16 32
girl 14 9 5 28
Total 28 13 21 60
C. Feverishly he went through the remaining strips of paper
Answer:
0.053
Step-by-step explanation:
This is a geometric distribution problem.
I'm geometric distribution problem,
E(X) = 1/p
Where;
E(X) is expected value and p is probability of success
Thus;
1/p = 12.5
p = 1/12.5
p = 0.08
Now, to find the probability that the sixth person tested is the first one with high blood pressure, we will use the probability formula in geometric distribution which is;
P(X = k) = qⁿ•p
q = 1 - p
q = 1 - 0.08
q = 0.92
Thus;probability that the sixth person tested is the first one with high blood pressure will be expressed as;
P(X > 5) = (0.92^(5)) × 0.08
P(X > 5) = 0.053
If you plug that into a calculator you get 4.5