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If you have 15 red socks (individual, not pairs), 24 green socks, 17 blue socks, and 100 black socks, what is the probability you will reach in the drawer and randomly select a pair of green socks? (Assume sampling without replacement.)
A random sample of n measurements was selected from a population with unknown mean μ and standard deviation σ. Calculate a 99% confidence interval for μ for each of the following situations: n=85, x¯=23.8, s=3.75
find an interval that would contain 68% of all data values from the sample.
How can such information be used as a tracking device for the impact of advertising? Is there a chance that these probabilities would change during the year?
Let X and Y be independent exponential random variables with parameters ?1 and ?2 respectively, where ?1 ?= ?2. Find the probability density function of X + Y.
a person leaves for work between 8 am and 8.30 am and takes between 40 and 50 minutes to get there. let the random
What is the probability that a random sample of 49 different one-hour shopping periods will yield a sample mean between 441 and 446 shoppers and what effect will this have on the standard error of the mean?
Identify the characteristics of the comparison (HO) distribution; specifically, its standard deviation and the quantities used to derive these characteristics.
In a suitable one-tail test at the 0.01 level, was the mean age for doctors having the greatest problems with difficult patients significantly less than that for those having the least problems with difficult patients? Identify and interpret the p..
They will have one beer for each tap, and no two taps will have the same beer on any given evening. How many different beer menus do they need to stock.
Find a simple regression model that predicts time to fulfill an order based on value of the order. Interpret the estimated model coefficients.
Briefly discuss the three combinations of variable types that can form bivariate data.
A random sample of the price of gasoline from 20gas stations in a region gives the statistics below. Complete parts a) and b) ybar = $3.59, s = $0.24 a) Find a 95% confidence interval for the mean price of regular gasoline in that region. __, __ (R..
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