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Question 1: In a sample of 150 auto occupants, 86% wore seatbelts. In a sample of 200 truck occupants, 74% wore seatbelts. At "alpha" = 0.10, is there sufficient evidence to reject the claim that there is no difference in these proportions?
Question 2: Find the 90% confidence interval for the true difference in proportions for the data in problem above.
Question 3: Marty claims that the standard deviation of the weights of pre - 1964 quarters is the same as that for post - 1964 quarters. The standard deviation for 40 pre-1964 quarters is 0.08700 grams and for 40 post-1964 quarters it is 0.06194 grams. At "alpha" = 0.05, can we reject Marty's claim?
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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