Answer:
(22.0297, 23.3703)
Step-by-step explanation:
Given that an economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California.
Let X be per capita income (in thousands of dollars) for a major city in California.
Mean = 22.7
n = 183
Population std dev = 6.3
Since population std dev is known we can use Z critical value.
Std error =
Z critical =1.44
Marginof error = ±1.44*0.4657=0.6706
Confidence interval 85%
=
Answer:
The number of calories in 5.5 cups are <u>495</u>.
Step-by-step explanation:
Given:
You buy milk that contains 180 calories per 2 cups.
Now, to find the number of calories in 5.5 cups.
Let the number of calories in 5.5 cups be
As, in 2 cups there are 180 calories.
2 cups is equivalent to 180 calories.
Thus, the ratio would be
So, in 5.5 cups there are calories.
5.5 cups is equivalent to calories.
Thus, the ratio would be
Now, we set proportion to get the number of calories in 5.5 cups:
<em>By cross multiplying we get:</em>
<em>Dividing both sides by 2 we get:</em>
.
Therefore, the number of calories in 5.5 cups are 495.