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a) Suppose a family has three children and you are told that at least one of them is a girl. What is the probability that all three children are girls? Define events clearly and use correct probability notation.
b) Assume that a family has n children and you are told that at least one of them is a girl. Find a general expression (as a function of n) for the probability that all the children are girls.
A sample of 40 random weeks finds a weekly loss mean of $3200 with a standard deviation of $750. Test their claim at the a=0.05 level.
Clearly a straight line model does not accurately describe what is going on with this data. Does this mean there is no relationship between income and time?
A researcher is studying IQ levels. From past experience she knows the population mean IQ for adults is 110 and the standard deviation is 15.
a discrete random variable x can assume 5 possible values 2 4 6 7 and 9. its probability distribution is shown
despite the shortcomings of the linear probability model and the advantages of the mle approach. yet the linear
Can we conclude a difference in means? YES or NO (circle one)
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
Find the first order statistics at time instance 3. Find the probability at time instance k,the person is at the location m steps to the right of the origin.
At the .01 significance level, can we conclude that the 30-yeer mortgage rate for small banks is less than 6 percent? Estimate the p -value.
The grades have a bell-shaped distribution. Based on this information, which one of the following is the best estimate of the number of students with grades between 55 and 83?
Give 99% confidence interval for mean number of years general managers of major-chain hotels have spent with their current company.
suppose we are interested in the proportion of left handed statistics student and we take a sample to estimate the
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