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Explain which would be of more interest in each of the following situations, the probability distribution function or the cumulative probability distribution function for X. If you think both would be of interest, explain why.
a. A politician wants to know how her constituents feel about a proposed new law. She hires a survey firm to take a random sample of voters in her district, and X = number in the sample who oppose the new law.
b. Each time someone is exposed to a virus, he or she could become infected with it. Let X = number of exposures a person has prior to becoming infected. For instance, if X = 0, the person became infected on the first exposure; if X = 1, the person became infected on the second exposure, and so on.
your company produces two varieties of self-sealing stem bolts standard and deluxe. in one year you can produce 365
an electronics store has received a shipment of 25 table radios that have connections for an ipod or iphone. ten of
Determine the probability of selecting sample with a mean of more than $100,000 but less than $112,000.
If the mean times for both George and Julia are actually the same, what is the probability that George will be let go?
Based on the equation of the least-squares line, we use software to predict the average number of home runs hit per game per team for the year 2001. We obtain the following.
question 1 the average fill volume from a random sample of 49 bottles of an energy drink is 32.8 ounces the standard
"What is the most important reason why you try to take care of your body: Is it mostly because you want to be attractive to others, or mostly because you want to keep healthy, or mostly because it helps your self-confidence, or what?"
In a pilot study, five kids are given several problems of each type to practice (and then tested on three problems), in one of the three Sequences: D-R-T, T-D-R, OR R-T-D.
What kind of a quasi-experimental design was used in this study?- What potential threats to internal validity are present in this design?
suppose it is known that 10 of people who play poker machines have a gambling problem. suppose it is also known that 20
a pkiggy bank contains 4 quarters 3 dimes 8 nickles and 9 pennies. what is the probability of randomly selecting a
the filling variance for boxes of cereal is designed to be .02 or less. a sample of 41 boxes of cereal shows a sample
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