High school and beyond, part ii: we considered the differences between the reading and writing scores of a random sample of 200 students who took the high school and beyond survey in exercise 5.3. the mean and standard deviation of the differences are is = -0.545 and 8,887 points.

a) calculate a 95% confidence interval for the average difference between the reading and writing scores of all students.

b) interpret this interval in context.

c) does the confidence interval provide convincing evidence that there is a real difference in the average scores? explain.

Which of the greatest common gcf of 32 and 48 a 16 b 96 c 8 d 32

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?

Astudent is determining the influence of different types of food on the growth rate of spiders. she feeds one group of spiders two caterpillars twice a week. the other group received similarly-sized beetles twice a week. she records the amount of time required for individuals to reach sexual maturity. her hypothesis is that the spiders feeding on caterpillars will have a faster growth rate because caterpillars have a higher protein content compared to beetles. in this experiment, what is the dependent variable? spiders assigned to different feeding groups. time required to reach sexual maturity number of prey items fed twice a week. growth rates of each group.