6) A random sample of n = 25 students participated in a study to determine whether keyboard skills are improved by taking a typing
course. The typing speed of each student was recorded at the start of the course and again at the end of the course. The mean
difference for the sample is xd - 32, with a standard deviation of sd - 10. What is the 99% confidence interval for the mean
difference in typing speed?
A)
(25.818, 38.182)
B)
(26.406, 37.594)
(26.850, 37.150)
D)
(27.016, 36.984)

Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

Match the scale and the actual area to the area of the corresponding scale drawing. scale: 1 inch to 4 feet actual area: 128 square feet scale: 1 inch to 7 feet actual area: 147 square feet scale: 1 inch to 8 feet actual area: 256 square feet scale: 1 inch to 5 feet actual area: 225 square feet area of scale drawing scale and actual area scale drawing area: 3 square inches arrowright scale drawing area: 8 square inches arrowright scale drawing area: 4 square inches arrowright scale drawing area: 9 square inches arrowright