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A woman who has just moved to a new job in a new town discovers two routes to drive from her home to work. The first Monday, she flips a coin, deciding to take route A if it comes up heads and to take route B if it is tails. The following Monday, she will take the other route. The first Tuesday, she flips the coin again with the same plan. And so on for the first week. At the end of two weeks, she has traveled both routes five times and can compare their average commuting times. Why should she not use the t -tools for two independent samples? What should she use?
The class ends the year with a mean of 68 and a stadard deviation of 9, the prof decides to bell curve the marks so that the top 10% gets an A (80%). What z score must a student achieve to recieve an A? What raw grade does this correspond to?
Analysis of variance (ANOVA) is used to determine if there is a difference between the means of different populations. This is an example from a student in Prescott Arizona.
Box A contains three balls with colors red, green and blue and box B contains a balls with colors red, yellow ,blue, white and brown A box is chosen and a ball is picked. What is the probability that the ball may be brown is? What is the probability ..
What are the appropriate ABC groups of inventory items? If demand for an item is 3 units per day, and delivery lead-time is 15 days, what should we use for a simple re-order point?
Find a value of p such that when 10,000 bits are received, the expected number of errors is at most 10 and using this value of p what is the probability of no errors? Of at least 1? of at least 10?
the random variable x has a poisson distribution with mean 40. give an approximate value of the probability p 37 less
An individual whose level of exposure to a certain pathogen is x will contract the disease caused by this pathogen with probability P(x). If the exposure level of a randomly chosen member of the population has probability density function f , dete..
The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100.
a significant interaction effect indicates thata. the influence of one factor is not the same for each level of the
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
A vertical line is drawn through a normal distribution at z = -0.25, and separates the distribution into two sections. What proportion of the distribution is in the larger section?
In a bag there are 20 marbles. The colors of the marbles are as follows: red - 5; blue - 8; green - 3; yellow - 4.
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