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1. Roger Amster teaches an English course in which 40 students are enrolled. After yesterday's class, Roger questioned the 5 students who always sit in the back of the classroom. Three of the 5 said "yes" when asked if they would like A Tale of Two Cities as the next class reading assignment.
a. Identify the population and the sample in this situation.
b. Is this likely to be a representative sample? If not, why not?
2. In studying the performance of the company's stock investments over the past year, the research manager of a mutual fund company finds that only 43% of the stocks returned more than the rate that had been expected at the beginning of the year.
a. Could this information be viewed as representing the nominal scale of measurement? If so, explain your reasoning. If not, why not?
b. Could this information be viewed as representing the ratio scale of measurement? If so, explain your rea- soning. If not, why not?
The new Lucky Lady Casino wants to increase revenue by providing buses that can transport gamblers from other cities. Research shows that these gamblers tend to be older, they tend to play slot machines only, and they have losses with a mean of $1..
a random sample of 70 needles was taken from a medical manufacturing facility and 24 were found to be defective.
Suppose your instructor randomly surveyed his or her performance (i.e., students "graded" the teacher) over many years (assume an 'infinite' population). The frequency of ratings were as follows:
a machine is set to pump water into a pool at the rate of 10 gallons per minute. upon inspection it is learned that
when only concerned about the results at one end of the distribution curve we use a one-tail test. we generally see a
The data show the total number of medals (gold, silver, and bronze) won by each country winning at least one gold medal in the 2006 Winter Olympics. Find the mean, median, and mode of the numbers of medals won by these countries.
a random sample of 5 homes in newberry florida had a mean of 169900 and a standard deviation of 21756. construct a 95
A sample of 350 lenses and found 5 lenses with surface defects. Formulate an appropriate test for the qualification of the polishing machine using an α = 0.05."
1. for each equation below identify what type of equation it is linear or exponential which variable is the independent
five percent of computer parts produced by a certain supplier are defective. what is the probability that a sample of
Sales manager wishes to award sales representatives who earn the largest commissions a bonus of= $1,000 .He can award bonus to 20% of representatives. Determine cutoff point between those who earn bonus and those who don't?
the probability that a person will have 01or 2 flat tires a year is 0.73 0.19 and 0.0o respectively. if ten people are
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