What is the effect of multiplying every element in a data set by as integer k? T

Question

What is the effect of multiplying every element in a data set by as integer k? There it no change in the mean told there it no change in the variance. The variance it divided by squareroot 4 and the mean it multiplied by K^-a The mean it multiplied by K and the variance K multiplied by K The mean K multiplied by k and the variance by squareroot k. One cannot determine the effect on the mean and the variance of the data set Which of the following statements about the sampling distribution of a sample mean is/are true? The larger the sample size, the smaller the spread of the tamping distribution. Provided that the population size is significantly greater than the sample size, the spread of the sampling distribution is about the same no matter what the sample size Sampling distribution from non-normal population are approximately normal provided n is large I only II only III only I and III II and III A small community college has 3,000 registered students, of whom 40% are full-time and the rest are part-time. Seventy-five percent of the full-time students are education major and 40% of the part-time students are education majors. If a random sample of 200 students is selected, what is the expected number of students in the sample who are education majors? 80 100 108 110 120 Using a random integer generator, generates 200 samples of 30 random integers between 0 and 4, inclusive. She records the total number of 0's and 1's in each of the 200 samples. Which of the following is the distribution she has simulated? A sampling distribution of sample proportion with n = 200, rho = 0.4 A sampling distribution sample proportion with n = 30, rho = 0.2 A binomial distribution with n = 5, rho = 0.2 A binomial distribution with n =30, rho = 0.4 A binomial distribution with n = 200, rho = 0.4

Explanation / Answer

2) (c)The mean is multiplied by k and varience is multiplied by k2

3) (A) I only

6) No of ewducation majors in 200 students

= 200x(0.4x0.75 + 0.6x0.4)= 108 (C)

7) (A) A sampling distribution with sample proportions with n=200 and p=0.4

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