The answer should be either b or d but i’m not too sure
The confidence interval for the mean usage of water is (18.7,20.5).
Given population standard deviation of 2.4, mean of 19.5 gallons per day and confidence interval of 98%.
We have to find the confidence interval for the mean usage of water.
To find out the confidence interval we have to first find margin of error.
μ=19.5
σ=2.4
α=0.98
α/2=0.49
We have to find the z value for the p value 0.49 which is z=2.33
Margin of error=z*μ/
=2.33*19.5/
=0.82
lower level=mean -m
=19.5-0.82
=18.68
after rounding upto 1 decimal
=18.7
upper mean = mean+m
=19.5+0.82
=20.52
Hence the confidence interval for the usage of water is (18.7,20.52).
Learn more about margin of error at brainly.com/question/10218601
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Answer:
33.32
Step-by-step explanation:
50/3=16.66
brian gets twice as collin
16.66*2=33.32
Answer:
7/9
Step-by-step explanation:
I think this is right : 56/72 gets simplified to 7/9
Answer: The bakery got $9,082.00.
Step-by-step explanation:
328 - 178 = 150
150 + 328 = 478
478 * 19 = 9082