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Married women. The 2010 American Community Survey estimates that 47.1% of women ages 15 years and over are married.48
(a) We randomly select three women between these ages. What is the probability that the third woman selected is the only one who is married?
(b) What is the probability that all three randomly selected women are married?
(c) On average, how many women would you expect to sample before selecting a married woman? What is the standard deviation?
(d) If the proportion of married women was actually 30%, how many women would you expect to sample before selecting a married woman? What is the standard deviation?
(e) Based on your answers to parts (c) and (d), how does decreasing the probability of an event affect the mean and standard deviation of the wait time until success?
The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected?
The club professional at a difficult public course boasts that his course is so tough that the average golfer loses a dozen or more golf balls during a round of golf.
A student organization at a small business college claims that the average class size is greater than 35 students. Test this claim at α " 0.02, using the following sample of class size:
find the critical value. assume that the test is twotailed and that n denotes the number of pairs of data n30 a0.001 i
Now they need your help to determine if the mean number of news shows watched in your neighborhood is similar to the national mean.
What is the relationship between exam anxiety and exam performance for students? What is the relationship between gender and exam performance for students?
If this past distribution is a good indicator of future grades, what is the probability of a student receiving a C in the course?
Develop a 97% confidence interval for the true population proportion.
Which smoothing constant appears best from these results? Why? Could you perhaps get even better results given these outcomes?
question according to the statistical abstract of the united states there are 31.1 milshylions one-person households
List all samples of size 2, and compute the mean of each sample. Compute the mean of the distribution of sample means and the population mean. Compare the two values. Compare the dispersion in the population with that of the sample means.
a radio manufacturer claims that 65 of teenagers 13 to 16 years old have their own portable radios. a researcher wishes
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