Ages of Presidents, use the ages (years) of the presidents at the times of their inaugurations. Treating the data as a sample, construct a 90% confidence interval estimate of the standard deviation of the population of all such ages. S=6.5613 n=41. Find confidence interval. Assume that each sample is a simple random sample obtained from a population with a normal distribution. Group of answer choices

maybe - definition of supplementary angles. im not sure. sorry

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13

step-by-step explanation: