Which describes the expected value: the sum over all outcomes of the value of the outcome times the probability of the outcome the level of confidence that a sample mean accurately represents a population mean the population mean the interval around the sample mean that you expect to contain the population mean

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

care to share were the trapezoid shown is ?

a

step-by-step explanation:

you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .