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The article "Fraud, Identity Theft Af?ict Consumers" (San Luis Obispo Tribune, February 2, 2005) included the accompanying breakdown of identity theft complaints by type.
Type of Percent of All
Credit card fraud
28%
Phone or utilities fraud
19%
Bank fraud
18%
Employment fraud
13%
Other
22%
Complaint Complaints
Lack of exercise
38%
Easy access to junk food
23%
Genetics
12%
Eating unhealthy food
9%
Medical condition
8%
Overeating
7%
A 2005 AP-IPSOS poll found that 21% of American adults surveyed said their child was heavier than doctors recommend. The reasons given as the most important contributing factor to the child's weight problem is summarized in the accompanying table.
Construct a bar chart for these data and write a sentence or two commenting on the most common types of identity theft complaints.
a. Construct a bar chart for the data on the most important contributing factor.
b. Do you think that it would be reasonable to combine some of these contributing factors into a single category? If so, which categories would you combine and why?
Construct a 95 percent confidence interval for the mean number of misspelled words in the population of student essays.
A random sample of 81 credit sales in a department store showed an average sale of $68.00. Historically, it is known that the standard deviation of the population is $27.00.
It is found that among a random sample of 130 of the school's students, 32% of them plan to go into general practice. Find the P-value for a test of the school's claim.
Automobiles arrive at the drive-through window at a post office at the rate of 4 every 10 minutes. The average service time is 2 minutes. the Poisson distribution is appropriate for the arrival rate and service times are exponentially distributed.
Suppose that 30% of all adults in Ohio support the increase. The probability that at least 800 people support the increase is?
the following data represent the number of children in a sample of 10 families from chicago 4 2 1 1 5 3 0 1 0 and 2.
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?
Hypothesis Testing: We wish to test the claim that the mean body mass index (BMI) of men is equal to the mean BMI of women. Use the data to the right to test this claim.
suppose that your favorite cafe is considering introducing a decaf version of its house blend and is interested in
How large a sample should he take to be within 200£ of the actual average with 99% confidence? He assumes the standard deviation of total monthly deposits for all customers is about 1000£.
This model is fit to the data using the method of least squares using statistical software, and the following ANOVA table is obtained
In a simple linear regression, the least squares regression line is (a) the line which makes the sample correlation as close to +1 or -1 as possible. (b) the line which best splits the data in half, with half of the data points lying above the reg..
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