Question 24 (1 point)
A random variable X follows a uniform distribution on the interval from 0 to 20. This distribution has
a mean of 10 and a standard deviation of 5.27. We take a random sample of 50 individuals from this
distribution. What is the approximate probability that the sample mean is less than 9.5?
0.2614
0.2514
0.2214
0.2314
0.2414

Kylie explained that (-4x+9)^2 will result in a difference of squares because (-4x+9)^2 (-4x+9)^2 =(-4x)^2+(9)^2=16x^2+81

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?