Forced expiratory volume (FEV) is a measure of lung capacity, in liters. Initial measurements provide a baseline value to study the impact of smoking on lung function in the population. Data are obtained on the FEV of a random sample of 100 youths in East Boston in the late 1970s. The sample mean FEV value is 2.3948 liters and the sample standard deviation is 0.80287 liters. The 90% confidence interval for the population mean is (2.26156 liters, 2.52818 liters). Select the correct interpretation of this confidence interval. Group of answer choices

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step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.