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1. A study was made on the post-graduation salary of a sample of 100 business graduates: the sample showed an average of $75,000 and a standard deviation of $3,000. Build a 95% and a 99% confidence interval estimator for the average salary.
An article published online claims that the average salary of business students after graduation is $80,000. What do you think of this claim, based on the observed sample?
2. A company manufactures batteries for watches. A random sample of 200 batteries is taken and the sample mean life is 5 years with a standard deviation of 0.7 years.
Construct a 90% CIE and a 99.75% CIE for the average life of the population of watches.
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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