Answer:
Step-by-step explanation:
You are given values for x. Plug them in to the given equations. Graph the two lines. Find the intersection. You can tell from the chart when you get the same y value for both equations
Answer:
It is rational
I have to add more characters so don't worry
Answer:
Given:
Sample size, n = 120
P = 48% = 0.48
p' = = 0.4
Significance level = 0.10
Null and alternative hypotheses are:
H0 : P = 0.48
H1 : P ≠ 0.48
For the test statistics:
Z = -1.754
P-value: This is a two tailed test.
For Z = -1.754 the P-value = 0.7943
Critical value: a = 0.10, 2 tailed test, Z critical = +1.645, -1.645
Decision Rule: We reject H0, if pvalue is less than significance level. We also reject H0 is Z observed is greater than Z critical.
Decision: Since pvalue, 0.7943 is greater than significance level, 0.10 we fail to reject null hypothesis, H0.
Conclusion:
There is not enough sufficient evidence to conclude that percentage of people who believe there is life on other planets differs from 48%
Answer:
(D)109
Step-by-step explanation:
Mean = 450 seconds
Standard deviation = 50
First, we determine the probability that the expected response time is between 400 seconds and 500 seconds, P(400<x<500)
Using the Z-Score,
From the Z-Score table
P(-1<x<1) = 0.68269
The probability that the expected response time is between 400 seconds and 500 seconds is 0.68269.
Since there are 160 Emergencies
Number whose expected time is between 400 seconds and 500 seconds