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The weights of dormitory cockroaches follow a normal distribution. 14% of the dormitory cockroaches weigh below 77 grams and 10% of them weigh above 82 grams. Find the mean and standard deviation of their weights.
Construct the following confidence intervals for your data set:
A probability value of .25 means that an event will occur:
For a normal distribution, the probability of randomly selecting a z-score greater than z = -2.00 is p = .0228.
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car
If there are 5 choices for a question and there is a 50% chance that the student knows the answer, what is the probability that the student knew the answer to a question he correctly answered?
What does the coefficient of determination tell you about the variation attendance and the variation in the number of exhibitors?
For value 10,40,20,50 and 40, value of arithmetic mean is? Simplest measure of dispersion is the Standard deviation, variance, Quartile deviation.
For thefts involving more than $1,000, there is an inverse relationship between the value of the goods stolen and the length of the prison sentence given to the thief.
Normalized matrix for one decision criterion at Firm T is given below.
Given that the student you choose is a senior, find out the probability of selecting a non-senior?
Using the confidence interval when conducting a two-tail test for the population mean we do not reject the null hypothesis if the hypothesized value for:
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