Find the value of d/с
1 answer:
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Answer:
Reject H0 since test statistic <-2.492
Step-by-step explanation:
Given that the American Water Works Association reports that the per capita water use in a single-family home is 74 gallons per day.
n = 25
x bar = 69
s= 8.3
std error = s/sqrt n =
H0:
Ha:
(Left tailed test at 5% significance level)
a) Reject H0 if t-2.492
b) Test statistic = mean difference/std error
=
=-3.01
df =24
c) Reject H0
Answer:
The present value of K is,
Step-by-step explanation:
Hi
First of all, we need to construct an equation system, so
Then we equalize both of them so we can find
To solve it we can multiply to obtain
, then we have
.
This leads to a third-grade polynomial , after computing this expression, we find only one real root
.
Finally, we replace it in (1) or (2), let's do it in (1)