Answer:
d) 65.9 in < μ < 67.1 in.
Step-by-step explanation:
Given that a 99% confidence interval (in inches) for the mean height of a population is 65.7 < μ < 67.3
Mean = average of 65.7 and 67.3 = ![66.5](https://tex.z-dn.net/?f=66.5)
i.e. here margin of error =![67.3-66.5=0.80](https://tex.z-dn.net/?f=67.3-66.5%3D0.80)
For 99% confidence interval critical value is 2.58
Hence std deviation = ![\frac{0.8}{2.58}](https://tex.z-dn.net/?f=%5Cfrac%7B0.8%7D%7B2.58%7D)
For 95% confidence interval critical value is 1.96
Margin of error = ![1.96*\frac{0.8}{2.58}\\=0.607752](https://tex.z-dn.net/?f=1.96%2A%5Cfrac%7B0.8%7D%7B2.58%7D%5C%5C%3D0.607752)
Hence confidence interval = ![(66.5-0.6, 66.5+0.6)\\= (65.9, 67.1)](https://tex.z-dn.net/?f=%2866.5-0.6%2C%2066.5%2B0.6%29%5C%5C%3D%20%2865.9%2C%2067.1%29)
d) 65.9 in < μ < 67.1 in. is right
Answer:
The original price was 56 dollars
Step-by-step explanation:
28 divided by 0.5 equals 56
Answer:
It would be 200,000
Answer:
a) 18 grapefruits
b) 6 grapefruits
Step-by-step explanation:
a) n = 14.4 / 0.80 = 18 grapefruits
b) n = (14.4 / 3) / 0.8 = 6 grapefruits
Answer:
Step-by-step explanation:
The total amount of students is 240
240(50%) = 120 > 60 so, the first true or false is False
240(5%) = 12 = 12 so, the the second true or false is True
240(60%) = 144 = 144 so, the third true or false is True
132 + 12 = 144