Answer:
Option A
Saves=$28.75
Step-by-step explanation:
See the image .
Answer:
A 90% confidence interval for the mean number of letter sounds identified in one minute is: (30.84, 37.34).
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
That is z with a pvalue of , so Z = 1.645.
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 34.09 - 3.25 = 30.84.
The upper end of the interval is the sample mean added to M. So it is 34.09 + 3.25 = 37.34.
A 90% confidence interval for the mean number of letter sounds identified in one minute is: (30.84, 37.34).
He has $18 left (sorry im have to type 20 letterssss)
Answer:
The relation between x and y is
Step-by-step explanation:
Given that,
The value of y varies directly as the square of x.
where r is constant of proportional.
Given that,
y= 27 and x=9
Plug y= 27 and x=9 in above relation
The relation between x and y is