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Complete the full confidence interval procedure for each of the following.
Problem
A college administrator would like to determine how much time students spend on homework assignments during a typical week. A questionnaire is sent to a random sample of n =100 students and their response indicates a mean of 7.4 hours per week. The population standarddeviation is known to be 3 hours. Construct a 95% confidence intervalfor the population mean of the number of hours student spend on homework during a typicalweek.
In Roosevelt National Forest, the rangers took random samples of live aspen trees and measured the base circumferenceof each tree. Assume that the circumferences of the trees are normally distributed.The average of the 100 trees sampled was 15.71. The population standard deviation is 4.63 inches. Construct a 90% confidence interval for the population mean of the circumference of the aspen tree.
The number of hours shoppers spend at Wegman's is normally distributed. A random sample of 25 shoppers has a sample mean of 42 minutes. The population standard deviation is 12 minutes. Construct a 99% confidence interval for the population mean of the time shoppers spend at Wegmans.
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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