Each year about 1500 students take the introductory statistics course at a large university. this year scores on the nal exam are distributed with a median of 74 points, a mean of 70 points, and a standard deviation of 10 points. there are no students who scored above 100 (the maximum score attainable on the nal) but a few students scored below 20 points.

(a) is the distribution of scores on this nal exam symmetric, right skewed, or left skewed?

(b) would you expect most students to have scored above or below 70 points?

(c) can we calculate the probability that a randomly chosen student scored above 75 using the normal distribution?

(d) what is the probability that the average score for a random sample of 40 students is above 75?

(e) how would cutting the sample size in half aect the standard error of the mean?

Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241

Will mark name all segments skew to bc

Ascientist studied a population of workers to determine whether verbal praise and/or tangible rewards affect employee productivity. in the study, some workers were offered verbal praise, some were offered tangible rewards (gift cards, presents, and some were offered neither. the productivity of each participant was measured throughout the study by recording the number of daily tasks completed by each employee. which inference might the scientists make based on the given information? a.) the number of daily tasks completed by each employee may influence the dependent variable, which is whether the employee receives verbal praise, tangible rewards, or neither. b.) verbal praise and/or tangible rewards may influence the independent variable, which is the number of daily tasks completed by each employee. c.) verbal praise and/or tangible rewards may influence the dependent variable, which is the number of daily tasks completed by each employee. d.) the dependent variables, which are verbal praise and tangible rewards, may influence the number of daily tasks completed by each employee.