Question

Could someone give me an example of how to solve these types of problems?
Using the following information calculate the test statistic z. ( 2 points each)

a.) Ho: µ = 10, σ = 3, n = 40, = 10.6

b.) Ho: µ = 120, σ = 23, n = 25, = 126.2

c.) Ho: µ = 18.2, σ = 3.7, n = 140, = 18.93

d.) Ho: µ = 81, σ = 13.3, n = 50, = 79.6

Answer 1

3+40=43 so add 10.6 10.6 rounds to 11 to 43+11=

Answer 2

i had this question and that was the answer

Answer 3

So the answer would be 54?

Answer 4

For B, I would then do
23+25= 48 then add 126.2?

Answer 5

test statistic, z = (observation - "null hypothesis mean")/(standard error)

Answer 6

start by finding the standard error

Answer 7

a.) Ho: µ = 10, σ = 3, n = 40, = 10.6


observation = 10.6
null hypothesis mean = 10

Answer 8

find out "standard error" and plug it in the earlier formula

Answer 9

How do I solve standard error?

Answer 10

standard error = \(\large \frac{\sigma}{\sqrt{n}}\)

Answer 11

So for the first one, 3/square root of 40?

Answer 12

yup !

Answer 13

1)
Standard error = 3/square root of 40 = 0.47
10.6-10 / 0.47?

Answer 14

z = (observation - "null hypothesis mean")/(standard error)

= \(\large \frac{10.6 - 10}{\frac{3}{\sqrt{40}}}\)

Answer 15

yes, simplify.. u may work out all others same way

Answer 16

.6/0.47 = 1.27 as the final answer?

Answer 17

correct !

Answer 18

Thank you!

Answer 19

np :)

Answer 20

@AnswerMyQuestions

Answer 21

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