# Question: a By Chebychev s Theorem at least how many students in

(a) By Chebychev's Theorem, at least how many students in a class of 200 would score within the range μ ± 2σ ?

(b) By the Empirical Rule, how many students in a class of 200 would score within the range μ ± 2σ ?

(c) What assumption is required in order to apply the Empirical Rule?

(b) By the Empirical Rule, how many students in a class of 200 would score within the range μ ± 2σ ?

(c) What assumption is required in order to apply the Empirical Rule?

## Answer to relevant Questions

An exam has a mean of 70 with a standard deviation of 10. Use Chebyshev's Theorem to find a lower bound for the number of students in a class of 400 who scored between 50 and 90. Find the original data value corresponding to each standardized z-score. a. Student GPAs: Bob's z-score z = + 1.71, μ = 2.98, σ = 0.36 b. Weekly work hours: Sarah's z-score z = + 1.18, μ = 21.6, σ = 7.1 c. Bowling ...CitiBank recorded the number of customers to use a downtown ATM during the noon hour on 32 consecutive workdays. (a) Use Excel to find the quartiles. What do they tell you? (b) Find the midhinge. What does it tell you? (c) ...Bags of jelly beans have a mean weight of 396 gm with a standard deviation of 5 gm. Use Chebyshev's Theorem to find a lower bound for the number of bags in a sample of 200 that weigh between 386 and 406 gm. The durations (minutes) of 26 electric power outages in the community of Sonando Heights over the past five years are shown below. (a) Find the mean, median, and mode. (b) Are the mean and median about the same? (c) Is the ...Post your question