Given that the mean is $9.5 and the standard deviation is $1.30, the standard error will be given by:
σ/√n
where
σ-standard deviation
n=sample size
thus, we shal have:
1.30/√20
=0.2906
Next we find the margin error
0.2906*2=0.581
thus the confidence interval will be:
(9.5+0.581, 9.5-0.581)
=(10.081,8.919)
Answer:
25/10
Step-by-step explanation:
Make the fractions improper by multiplying the whole number by the denominator and then adding the numerator (if this makes sense).
This makes 5x10=50+3=53/10
Do the same for the second fraction. 2x5=10+4=14/5
Then make the denominators the same, and in this case all you need to do is multiply both sides of 14/5 by 2, so that makes 28/10.
Now, just take it away.
53/10-28/10=25/10, which can be then simplified into 2 1/2 or 5/2.
Answer:
C
Step-by-step explanation:
Answer:
42
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
Volume of a cylinder is equal to the area of the base circle times the height of the cylinder.
The area of your base circle is 
where r=15 and they are using 
as 3.14.
So we have the area of your base circle is 
inches squared.
Now to find the volume of a cylinder again you just multiply your base area by your cylinder and you get:
cubic inches
