Stats M. 7

Question 1

µ=

Answer 1

population mean

Question 2

p=

Answer 2

population proportion

Question 3

σ=

Answer 3

population standard deviation

Question 4

parameter (population) =

Answer 4

µ
p
σ

Question 5

Statistic (sample)

Answer 5

x̄
p̂
s

Question 6

x̄=

Answer 6

sample mean

Question 7

p̂=

Answer 7

sample proportion

Question 8

s

Answer 8

sample standard deviation

Question 9

point estimate

Answer 9

a single number that is our best guess for the parameter
-x̄,p̂

Question 10

interval estimate

Answer 10

a range of plausible values for the parameter
-known as the confidence interval
-lower and upper limit

Question 11

margin of error

Answer 11

(upper limit-lower limit) /2

Question 12

n=

Answer 12

sample size

Question 13

Confidence interval interpretation requirements

Answer 13

USE the word confident
-the confidence level
-the parameter that you are estimating
-context
-values for the confidence interval upper and lower limits

Question 14

confidence level =

Answer 14

the probability that the method we are using to construct the confidence interval will produce an interval that actually captures the value of the unknown parameter

Question 15

increasing the sample size will…

Answer 15

produce a smaller (narrower/more precise) interval

Question 16

decreasing the sample size will…

Answer 16

produce a bigger (wider/less precise) interval

Question 17

increasing the confidence level will…

Answer 17

produce a bigger (wider/less precise) interval

Question 18

decreasing the confidence level will…

Answer 18

produce a smaller (narrower/more precise) interval