As your sample size grows larger, the n - 1 adjustment for the standard deviation has a smaller impact on the estimates of standard deviation.
<u>Step-by-step explanation:</u>
The average (mean) of sample's distribution seems to be the same as the distribution mean at which samples were taken. The means of mean distribution will not change. However, the standard deviations for the samples mean is the standard deviations of the primary distribution divided by square roots of the samples size.
The standard deviations of means decreases as the samples size increases. Likewise, when the samples size decreases, the standard deviations for the samples mean increases. So, there is a little impact on standard deviations estimation when sample size increases.
Answer:
The minimum number of males over age 45 they must include in their sample is 601
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 .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population(square root of the variance) and n is the size of the sample.
Assuming a variance of 1 liters, what is the minimum number of males over age 45 they must include in their sample?
This is n when
Rounding up
The minimum number of males over age 45 they must include in their sample is 601
Answer:
28pi cubic inches The volume of the cone is one-third the volume of the cylinder
Step-by-step explanation:
Use the formulas
Volume of cone = (1/3)* π r^2 * h
Volume of cylinder= π r^2 * h = 84 pi cubic inches
Volume of cone = (1/3) * volume of cylinder = (1/3) * 84 * pi = 28 pi cubic inches
Answer:
$6
Step-by-step explanation:
In order to find the amount of the tip that T.J. and Lindsey will leave for their waiter, you have to multiply the lunch cost for the percentage they want to leave as a tip for their waiter:
Lunch cost=$30
Percentage they want to leave as a tip= 20%
$30*20%=$6
According to this, the answer is that the amount of the tip is $6.
X/35 = 7
we can multiply 35 on both sides
x = 245