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1. Suppose a realtor is interested in comparing the asking prices of homes in Philadelphia and Baltimore. A random sample of 21 listings in Philadelphia resulted in a sample mean price of $185,900, with a sample standard deviation of $2,300. A random sample of 26 listings in Baltimore resulted in a sample mean price of $184,500, with a sample standard deviation of $1,750. At a 5% level of significance, test to see if there is a significant difference in the mean asking prices in the two cities. What is your conclusion?
2. According to a study conducted by Dell Computers, 59% of mean and 70% of women say that weight is a very important factor in purchasing a laptop computer. Suppose this survey was conducted using 374 men and 481 women. Do these data show enough evidence to support the conclusion that there is no difference in the proportion of men and women who think weight is a factor in purchasing a laptop? Use a 5% level of significance.
q1.the average number of pounds of meat that a person consumes each year is 218.4 pounds. let the standard deviation
Describe the basic characteristics of a normal distribution and the normal curve. What are z scores and how are they used in relation to distributions and raw scores?
Criterion of realism or Hurwitz. Assume that the payoff from an investment depends on market conditions. Illustrate what is the criterion of realism value.
pages were randomly selected by three authors a b and c. the big reading company scores are listed below. use a 0.05
A random sample of 43 light bulbs has a mean life of 677 hours with a standard deviation of 90 hours. Do you have enough evidence to reject the manufacturer's claim?
1.there are two statistics classes. the first has 250 students and the second has 200 students. in the first class the
there are 4 unrelated parts to this question. justify your answersa i if 8 identical blackboards are to be divided
Medication, 47% take cholesterol-lowering medication, and 12% take both medications. What is the probability that a senior citizen takes either blood pressure-lowering or cholesterol-lowering medication?
for each of the following distributions find the minimum usual value ? - 2? and the maximum usual value ? 2?.a.
Teens were asked in the MTF 2006 survey how often they think about social issues (specific issues were not identified). The bivariate table includes responses organized by teen's race.
A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a colour television is $90 with a standard deviation of $22. Monte's TV Sales and Service completed repairs on two sets this morning. The labor cost for the..
What is the probability a random sample of 90 test takers will provide a sample mean test score within 10 points of the population mean of 502 on the Critical Reading part of the test (to 4 decimals)?
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