Answer:
36+2w=96
2w=96-36=60
w=60/2=30
Step-by-step explanation:
perimeter is 96, that means length + length + width + width = 96.
say l is length and w is width.
since we know length is 18, 18+18+width+width = 96
36+2w=96
2w=96-36=60
w=60/2=30
Answer:
a. We reject the null hypothesis at the significance level of 0.05
b. The p-value is zero for practical applications
c. (-0.0225, -0.0375)
Step-by-step explanation:
Let the bottles from machine 1 be the first population and the bottles from machine 2 be the second population.
Then we have 
, 
, 
and 
, 
, 
. The pooled estimate is given by
a. We want to test 
vs 
(two-tailed alternative).
The test statistic is 
and the observed value is 
. T has a Student's t distribution with 20 + 25 - 2 = 43 df.
The rejection region is given by RR = {t | t < -2.0167 or t > 2.0167} where -2.0167 and 2.0167 are the 2.5th and 97.5th quantiles of the Student's t distribution with 43 df respectively. Because the observed value 
falls inside RR, we reject the null hypothesis at the significance level of 0.05
b. The p-value for this test is given by 
0 (4.359564e-10) because we have a two-tailed alternative. Here T has a t distribution with 43 df.
c. The 95% confidence interval for the true mean difference is given by (if the samples are independent)
, i.e.,
where 
is the 2.5th quantile of the t distribution with (25+20-2) = 43 degrees of freedom. So
, i.e.,
(-0.0225, -0.0375)
N=5 or n=9 can be either one
Hope this helped
Not enough info. We dont have the prices from the stores
Answer:
C .56
Step-by-step explanation:
well thier are 5 days that are less then 3 days and theirs 9 days in total so you would do 5/9 to get the chance of it being less then 3 days.
5/6 = .555556
