Ch.10 Hyphthesis Testing

Question 1

5 Steps to test hypothesis

Answer 1

1. Null/Alt Hypotheses H₀/H₁
2. Level of Significance α
3. Sketch Critical Value CV
   Right-/ Left-/ 2- Tailed Test
   & z / t (df=n-1)
4. Calc. Test Statistic TS z / t
5. Compare & Decide

Question 2

Typical Description of
Step 2
Step 4
Step 5

Answer 2

Step 2
Use z(t) because σ is (UN)KNOWN

Step 4
REJECT the null hypothesis
IF the sample statistic result is >/</beyond …

Step 5
Since the test sample statistic result is (not) >/</beyond,
we (do not) REJECT the null hypothesis H₀
The sample suggest that …
at a α% level of significance

Question 3

Calculation of
z & t

in step 4

Answer 3

. xᵦₐᵣ-μ xᵦₐᵣ-μ
z =———– t =————
. σ/sqrt(n) s/sqrt(n)

= numerator/denominator

Question 4

Error Type