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Q. The scores on a university examination are normally distributed with a mean of 62 and a standard deviation of 11. If the top 10% of students are given A's, what is the lowest mark that a student can have and still be awarded an A?
A. 63.28 B. 70.97 C. 76.08
Q. A sample was taken of the salaries of 20 employees from a large company. The following are the salaries (in thousands of dollars) for this year (the data are ordered).
28 31 34 35 37 41 42 42 42 47 49 51 52 52 60 61 67 72 75 77
Suppose each employee in the company receives a $3000 raise for next year (each employee's salary is increased by $3000). The interquartile range of the salaries will
A. be unchanged. B. increase by $3000. C. be multiplied by 3000.
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?
Questions based on binomial distribution, variance of the binomial distribution, discrete random variable and continuous random variables.
Find out the probability
The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be
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..
Take a confidence interval for the difference in the average of renting between the first andthird hotel.
What is the probability that they all hit the target?
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Compute the variance and standard deviation
Concept of statistical signi cance
Estimate the population mean
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