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1. Assuming boy and girl children are equally likely and births are independent, if parents have two children, what is the probability that at least one is a boy? On the condition that at least one is a boy, what is the probability that one of the children is a girl?
a manager wishes to determine whether the mean times required to complete a certain task differ for the three levels of
Since they will be multiplying this average by the total number of customers to get an overall forecast, they would like to accurately estimate this average with a margin of error of less than $4000.
The mean score of a college entrance test is 500, the standard deviation is 75 and the scores are normally distributed.
Explain why odds of 4 to 5 in favour of an event occurring have a different meaning than the same event having a probability of 4/5.
Assume that the probability of a defective computer component is 0.2. Find the probability that the first defecr is found in the fifth component tested.
Construct a 99% confidence interval for the difference between the true average boot times of the two types of hard drives. Assume the difference will represent (HDD-SSD) and that the population standard deviations are statistically the same.
on a sample of 30 women and 20 men 12 men like footbaill while 15 men like football. is there evidence for gender
if we increase the size of our sample for ex. the pairs of data that we collect. will this affect linear correlation
Use a 0.05 significance level to test the null hypothesis that the different weight categories have the same mean. Do the data suggest that larger cars are safer?
suppose that the number of accidents at a nuclear power plant in one week has a poisson distribution with mean 3 and
When computing a t-test, it is important to distinguish between directional and nondirectional hypotheses as the direction will determine the rejection regions. Describe how the rejection regions would differ according to the type of hypothesis yo..
Multiple choice question based on multiple regression - partial computer output based on a sample of 16 observations and find the estimated regression equation
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