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Starbucks has found that 23% of customers purchase more than one cup of coffee per day from their shops. Suppose you randomly choose 215 of today's Starbucks customers.
1) Find the probability that no less than 31% of them purchased more than one cup of coffee from Starbucks.
On the SAT, the average Writing score is 475 points and the average Mathematics score is 521 points. The standard deviation is 80 points on each part of the test. Now suppose 60 test takers are selected.
2) 10% of the time the sample average Mathematics score should be less than what?
The number of hours adults sleep per night is normally distributed with a mean of 6.6 hours. Assume the standard deviation is unknown.
3) If 65% of adults sleep more than 5.8 hours per night , what is the variance?
**Please round answers to 4 decimal places**
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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