Answer:
We conclude that the bowler's score is equal to 150 points.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 150
Sample mean, = 2 157
Sample size, n = 22
Alpha, α = 0.05
Population standard deviation, σ = 18
First, we design the null and the alternate hypothesis
We use Two-tailed z test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
z-statistic lies within the range of acceptance region that is from -1.96 to 1.96, we fail to reject the null hypothesis and accept the null hypothesis.
Thus, bowler claims that her bowling score is not equal to 150 points is not true and we conclude that the bowler's score is equal to 150 points.
The answer would be 680 because 20% of 850 is 170 so 850-170=680.
Answer:
its gonna be A 100%
Make me the brainiest!
Step-by-step explanation:
Answer:
We use ratio and proportion
If EC$ 2.50 = US$ 1.00
Then EC$ 20.00 = US$ 20 × 1 / 2.50
= US$ 8.00
Hope this helps