Question

A student conducted a survey of all 500 employees in a company. He calculated the population mean of the number of cars they owned to be x%. He calculated the proportion of employees who drove a car to work to be y%.

Another student conducted a survey of a sample of 10 employees in the same company. She found the sample mean of the number of cars they owned to be p%. She found the sample proportion of employees who drove a car to work to be q%. Which parameter would be considered to be point estimates?

Answer 1

A.x and p
B.x and y
C.y and p
D.y and q
E.p and q

Answer 2

@amistre64

Answer 3

Which parameter would be considered to be point estimates?

the sample means are always point estimates of the population means

Answer 4

p?

Answer 5

p is a sample mean yes, and the other one is the sample proportion ... these can be used when the population stuff is unknown

Answer 6

so is there a formula?

Answer 7

no formula, just textbook knowledge from the readings from the chapter that includes point estimators

Answer 8

estimators? does that mean that its guessing

Answer 9

in a sense, yes. It means that we can approximate (get close to) the population values by using the sample values under certain criteria

Answer 10

so what is the next step..

Answer 11

choose the sample parameters as the point estimators for the population values. which 2 letters are they associating with the sample?

Answer 12

x and y?

Answer 13

lets test that out:

population mean ... to be x%.
proportion ... to be y%.

so im going to say no for x and y

Answer 14

it cant be p and q either right?

Answer 15

well, since it cant be x or y; that only leaves us with p and q

Answer 16

ohhh i thought p and q couldnt be a valid answer

Answer 17

so E?

Answer 18

sample mean ... to be p
sample proportion ... to be q

E would fit that yes

Answer 19

sample values are point estimators for population values

Answer 20

alright, i think i understand that