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Suppose that bicycle chain links have lengths distributed around a mean, = .50 cm, with a standard deviation = .04 cm. The manufacturer's standards require the chain to be between 49 and 50 cm long.
(a) If chains are made of 100 links, what proportion of them meets the standards?
(b) If chains are made of only 99 links, what proportion now meets the standards? How many links should be put in a chain?
(c) Using 99 links, to what value must a be reduced (how much must the quality control on the links be improved) in order to have 90 percent of the chains meet the standards?
Cheating. A Rutgers University study released in 2002 found that many high school students cheat on tests.
suppose we are comparing the variability in healthcare costs from one state to another in the us. for state 1 the
Compute the range, interquartile range, variance, standard deviation, and coefficient of variation. Compute the Z scores. Are there any outliers?
Use the 45 sample means to determine whether the sampling distribution of the sample mean is approximately normally distributed by constructing a boxplot, relative frequency histogram, and normal quantile plot of the 45 sample means.
Repeat the previous exercise when ?2r(?) is replaced by the noncentral F-distribution Fr1,r2 (?) (see §1.3.1) with unknown ? > 0 and known positive integers
Where was Atlantis located, when did it exist, and how did it come to an end, according to Donnelly? What is the main historical source for Atlantis?
Suppose that 40% of the transmitted digits are 0s. 1. What is the probability that a transmitted digit is correctly received by the satellite?
A jar of peanut butter contains 457 grams with a standard deviation of 10.7 grams. Assuming a normal distribution, find the probability that a jar contains less than 454 grams.
At some vacation destinations, "all-inclusive" resorts allow you to pay a flat rate and then eat and drink as much as you want.
Review "Simulation Case Study: Phoenix Boutique Hotel Group" for this topic's case study, in which you provide guidance to Phoenix Boutique Hotel Group (PBHG) founder Bree Bristowe.
let us suppose that sat mathematics satm scores in the absence of coaching vary normally with mean 515 and ? 100.
consider the model below for scheduling postal workers to 5 day shiftsminimize z mf ts wsu thm ft sw suthsubject
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