The makers of a soft drink want to identify the average age of its consumers. A sample of 25 consumers was taken. The average age in the sample was 31 years with a standard deviation of 3.8 years. The Margin of error of the 99% confidence interval for the average age of the consumers is

Step-by-step explanation:

d_f=25-1=24

critical t value=tinv (0.05,24)=2.064

Margin of error=2.064×(3.8/sqrt(25))=1.86

99% confidence interval for mean

=22.5+/-1.86

=(20.64, 24.36)

6(h+1)/2=a

a=area

step-by-step explanation:

its the same thing as a square or rectangle but after multiplying two sides you need to divide it by two.