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Answer the questions:
a) A population variance is computed to be 81. What is the standard deviation?
b) A sample standard deviation is computed to be 4.5. What is the variance?
c) What is the standard deviation of the 6 grades (shown below) from a Statistics midterm?
85 85 85 85 85 85
d) Which group has the most variation? (Which one is the correct group?)
A B C
Mean 75.5 75.7 75.2
Standard Deviation 3.2 0.8 2.5
e) For an exam given to a class, the students' scores ranged from 25 to 95, with a mean of 65.
What is the most realistic value for the standard deviation (Choose): -10 0 3 70
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
MATH1550H: Assignment: Question: what is the least number of applicants that should be interviewed so as to have at least 50% chance of finding one such secretary?
MATH1550H: Assignment: Question: Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form
MATH1550H: Assignment:Questions: (Genetics) What is the probability that at most two of the offspring are aa?
MATH1550H: Assignment: Questions: Let’s assume the department of Mathematics of Trent University has 11 faculty members. For i = 0; 1; 2; 3; find pi, the probability that i of them were born on Canada Day using the binomial distributions.
Caselet on McDonald’s vs. Burger King - Waiting time
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Problems on Sampling Variability and Standard Error and Confidence Intervals
Estimate the population mean
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Find out the probability
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