Answer:
We are confident at 90% that the true mean for the amount spent on medicines is between (4568.96 and 4631.04)
Step-by-step explanation:
Information given
represent the sample mean for the amount spent on medicines
population mean
s=800 represent the sample standard deviation
n=1800 represent the sample size
Solution
The confidence interval for the true population mean is given by:
(1)
We can calculate the degrees of freedom with:
We know that the Confidence level is 0.90 or 90%, the value of significance is
and
, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,1799)".And we see that
Replcing in the formula for the confidence interval we got:
We are confident at 90% that the true mean for the amount spent on medicines is between (4568.96 and 4631.04)
Answer:
Maximum: 7
Minimum: 0
Step-by-step explanation:
A proper subset B of a set C, denoted
, is a subset that is strictly contained in C and so necessarily excludes at least one member of C.
This means that the number of elements in B must be at least 1 less than the number of elements in C. If the number of elements in C is 8, then the maximum number of elements in B can be 7.
The empty set is a proper subset of any nonempty set. Hence, the minimum number of elements in B can be 0.
The answer should be C because -1 so go down one the it postive 2 so go to the right 2
31.5749...9...9....9....9....