if the equation has a negative slope that will indicate that the slope is negative
ex. y=-<u>5x</u>+6
Answer:
a)At the 10% significance level, we fail to reject the null hypothesis.
b) P-value is ≈ 0.48
Step-by-step explanation:
Let p be the proportion of the auditors agree with the statement "Cash flow is an important indicator of profitability."
Then,
: p=0.5
: p≠0.5
Test statistic can be calculated as:
z=
where
- p(s) is the sample proportion of the auditors agree with the statement. (
=0.525)
- p is the proportion assumed under null hypothesis. (0.5)
- N is the sample size (200)
Using these numbers we get:
z=
≈0,707
and p(z) is ≈ 0.48. Since 0.48>0.10, the result is not significant at 90% level. Therefore we fail to reject the null hypothesis.
The probability that the teacher selects both boys from a seventh grader and eighth grader.
first calculate the probility that it is boy in each grade
7th
x = 7 / ( 7 + 3) = 7 / 10
8th
y = 2 / (2 + 2) = 1 / 2
so the probability
P = ( 7 / 10 ) ( 1 / 2 )
P = 0.35
1,390.0 I think I’m not Answer:
Step-by-step explanation: