Please help me with this homework
1 answer:
Answer:
See screenshot below
Step-by-step explanation:
Yes Bus Column:
- We need to find an answer for the "no taxi" section. And we have the total and the "yes taxi" section. So, the "yes taxi" section + the "no taxi" section gives you the total. Another way of saying this is total - "yes taxi" = "no taxi"
- 125 - 30 = 95
No Bus Column:
- We need to find the total of the "yes taxi" section and the "no taxi" section. So, if we add those two sections together, we'll get the total
- 90 + 185 = 275
Total column:
- So, this column is really simple to fill out. All we're doing it adding our answers above to get one answer in each section.
- "Yes Taxi" section: 30 + 90 = 120
- "No Taxi" section: 280
- Total section: 125 + 275 = 400
- We could have also done the total section by adding together 120 and 280, but we would get the same answer, anyway.
I hope this helps!
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Answer:
78.81%
Step-by-step explanation:
We are given;
Population mean; μ = 149
Sample mean; x¯ = 147.8
Sample size; n = 88
standard deviation; σ = 14
Z-score is;
z = (x¯ - μ)/(σ/√n)
Plugging in the relevant values;
z = (147.8 - 149)/(14/√88)
z = -0.804
From z-distribution table attached, we have; p = 0.21186
P(X > 147.8) = 1 - 0.21186 = 0.78814
In percentage gives; p = 78.81%
