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The average weight of adult men is 172 pounds with a standard deviation of 29 pounds. 30 men were asked their weight and the mean was calculated to be 181, test the hypothesis that the mean is not 172 pounds using alpha = .05.
At the 5% level of significance, can we infer that branch A has a significantly higher proportion of satisfied customers than branch B?
In performing the symmetric approximation, you calculate a mean of the total system cost as $1,725K. The variance is 22500. The POE is $1,600K.
Suppose that the population of heights of male college students is approximately normally distributed with mean m of 69.09 inches and standard deviation s of 4.71 inches.
The process of using sample statistics to draw conclusion about the true population parameters is called:
It costs ABC $0.5 per pound to ship the box containing the weights. Because it's an odd-shaped package, though, shipping the bar costs $0.6 per pound plus a $10 surcharge. Find the mean and standard deviation of the company's total cost for shippi..
The trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?
When a fisherman catches a fish, it is a young one with a probability of 0.23 and is returned to the water. On the other hand, an adult fish is kept to be eaten later.
The probability of contracting the kissing disease is .23 when one is exposed to a certain provocative environment. Sixty people are so exposed. What is the probability that no more than 10 are infected with this dreaded disease.
A woman has n keys, of which one will open her door. (a) if she tries the keys at random, discarding those that do not work, what is the probability that she will open the door one her kth try?
Out of the 109 males, 42% preferred Pepsi and out of the 53 females, 40% preferred Pepsi. Pepsi wanted to test to determine if the males preferred Pepsi more than females.
Conditional and compound probabilities.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
Determine the variance of firm's profit for the month.
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