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Question: Kids again. Find the standard deviation of the number of children the couple in Exercise may have.
Exercise: Kids. A couple plans to have children until they get a girl, but they agree that they will not have more than three children even if all are boys. (Assume boys and girls are equally likely.)
a) Create a probability model for the number of children they'll have.
b) Find the expected number of children.
c) Find the expected number of boys they'll have.
Determine the equations for the acceptance and rejection lines. What is the first opportunity to reject? What is the first opportunity to accept?
A regression of height (X, in inches) on hourly earnings (Y, in dollars), yields the following results: What is the value of b1 in the regression Y = b0 + b1X?
1.in the 2004 presidential election early exit polls conducted at key precincts indicated a strong lead for john kerry.
The demand for a product of Carolina Industries varies greatly from month to month. Based on the past 2 years of data, the following probability distribution shows the company's monthly demand.
Opinion polling organizations contact their respondents by telephone. Random telephone numbers are generated, and interviewers try to contact those households.
Determine the control limits for the mean and the range. Plot the control limits for the mean outside diameter and the range.
Most water tanks have a drain plug so that the tank may be emptied when it's to be moved or repaired. How long it takes a certain size of tank to drain depends on the size of the plug, as shown in the table. Create a model.
Microsoft Corporation makes software packages for use in microcomputers. The company believes that if at least 25% of present owners of microcomputers.
tim gets 15 emails on average per day i.e. per 24 hours. emails arrive randomly and independently.a what is probability
We already know that the marginal distribution of X is Unif(0, L). Check that marginalizing out Y from the joint PDF agrees.
A bowl contains R red and W white chips. Suppose N chips are drawn without replacement from the bowl.
What are the null and alternative hypotheses in this situation?
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