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In a meat packaging plant, Machine A accounts for 60% of the plant's output while Machine Baccounts for 40% of the plant's output. 1% of the packages from Machine A are improperly sealed while 2% of the packages from Machine B are improperly sealed.
a) What is the probability that a randomly chosen package is improperly sealed?
b) If a package is selected at random and found to be improperly sealed, what is the probability that it came from Machine A?
c) If a package is selected at random and found to be properly sealed, what is the probability that is came from Machine A?
In a one-way ANOVA analysis of 3 treatments, with the total number of 9 observations, with an equal number of observations in each treatment, mean-square-error (MSE) was found to be 24.905.
Jill wants to do her MBA in Statistics at a B.C. university. She applies to two universities that offer post-graduate degrees in Statistics.
Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 102.9 hours and a standard deviation of 16.5 hours.
An election coming up next week promises to be very close. In fact, assume that 50% are in favor and 50% are against. Suppose you conduct a poll of 791 randomly selected likey votes. Approx. how different will the percent in favor (from the poll) ..
For people with a certain disease, the length of time Y spent in remission is described by the following pdf
At the .01 significance level can we conclude the mean age is more than 8.4 years for the cars of university students? Compute the value of the test statistic.
The standard deviation in cash bonuses is $15,618 and the standard deviation in annual pay is $28,077. The estimated slope of best fitting line relating x and y is?
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
Calculate the mean, mode and median of the grouped data derived from the frequency distribution above. Compare the results obtained from
(a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
A logistic regression model was used to assess the association between CVD and obesity. P is defined to be the probability that the people have CVD.
Interpret values of b1, b2, b3 and b4 in this estimated regression equation.
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