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Here are the golf scores of 12 members of a college women's golf team in two rounds of tournament play. (A golf score is the number of strokes required to complete the course, so that low scores are better.) To what extent may we predict the second round score from the first round score? The standard error of the slope is 0.23.
89
90
87
95
86
81
102
105
83
88
91
79
94
85
76
107
80
a. Find a 95% confidence interval for the slope.
b. Find a 99% confidence interval for the slope.
The sample mean is 4.1 and the sample standard deviation is 1.4. It can be assumed that the population is normally distributed. The degrees of freedom associated with this are?
A manufacturer claims that he makes light bulbs each of which has a 0.9 probability of operating successfully when plugged in.
In a group of college students there are 200 women, 10 of whom smoke. There are 150 men, 32 of whom smoke. Calculate the probability a randomly selected student is a woman or a smoker.
How large should the sample be if I want to maintain a 95 percent level of confidence and suffer a maximum error of $2.00 in my estimate of the highest price consumers are willing to pay?
Discuss a recent research project undertaken in the last 3 to 5 years. What type of analysis was conducted? What decisions were made?
1. What is the current status of the housing stock in the county?
We assume that we have selected two independent random samples from populations having proportions p 1 and p 2 and that p-hat 1 = 800/1000 and p-hat 2 = 950/1000
With probabilities 0.8, 0.1, 0.08 and 0.02 respectively. A particular company offers a $500 deductible policy. If the company wishes its expected profit to be $100, what premium should it charge?
Within each of your current careers/ jobs, there are sets of data that can be analyzed. For example, a teacher can use a set of test scores, a dietician can analyze a set of patient weights and correlate them to incidences of diabetes, and a sales..
consider two independent random variables xsub1 and xsub2 having the same cauchy distributionfx1pie1x2 for negative
stratum 3 contains 1,000 invoices, and stratum 4 contains 3,450 invoices. A sample of 500 sales invoices is needed. What type of sampling should you do? Why?
How many seats sould be in the non-smoking area in order to be very sure (mean+3StandardDeviation) of having enough seating there?
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