Answer:
b) B and D and c) A and C
Step-by-step explanation:
The hypotheses would be:
(Right tailed test at 5% level)
Sample proportions are
Sample A B C D
Success 31 34 27 38
Proportion p 0.775 0.85 0.675 0.95
Std error
(sqrtpq/n) 0.066 0.056 0.074 0.034
p diff
p-0.75 0.025 0.10 - 0.075 0.20
Z stat
p diff/SE 0.0757 1.77 1.01 5.80
p value 0.469 0.038 0.156 0.000001
we find that p value is more smaller than alpha, the more accurate the alternate hypothesis.
b) Only B and D provide against the null. Because p <0.05
c) A and C provide no evidence for the alternative because p >0.05
Answer: 45
Step-by-step explanation:
Answer: $3.30
Explanation:
You set up a proportion where
9.25 X
------ = -----
2.8 1
Then you cross multiply and see that...
2.8X = 9.25
Then X = 9.25 / 2.8 = 3.30
Answer:
80°
Step-by-step explanation:
Plot two lines: line passing through the points R, S and U and line passing through three points V, S and T (see attached diagram).
These line intersect at point S and form four angles: RSV, VSU, UST and TSR.
Angles VSU and RST are vertical angles, angles RSV and UST are vertical angles. Vertical angles are congruent, so
m∠VSU = m∠RST = 100°
m∠RSV = m∠UST
Angles RSV and VSU are supplementary angles (add up to 180°). Som
m∠RSV = 180° - m∠VSU =180° - 100° = 80°
Angle RSV is angle VSR (we can read from the right to the left or from the left to the right angle's name)