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An outbreak of the deadly Ebola virus in 2002 and 2003 killed 91 of the 95 gorillas in 7 home ranges in the Congo. To study the spread of the virus, measure distance by the number of home ranges separating a group of gorillas from the first group infected. Here are data on distance and number of days until deaths began in each later group:
Find the correlation r between x and y.
Develop a 90 percent confidence interval for the proportion opposing health care changes. (Round your answers to 4 decimal places.)
Also, the sample data appear to have a bell-shaped distribution. Construct the 95% confidence interval for the mean time spent on paperwork by all managers.
The manufacturer of Feel Better aspirin advertises that 60% of pediatricians recommend Feel Better for children under twelve. Safe and Sound, a rival manufacturer
As part of your answer, draw a standard normal curve and shade the area under the curve that represented the answer to the question. What minimum score would a student need in order to score better than 77% of those taking the test?
Find the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
An account invested in a money market fund grew from $73,329.23 to $73,627.26 in a month. What was the interest rate to the nearest tenth?
Mean satifaction differ according to how they most use the bank? Identifing notation, state the null and alternitive hypotheses for conducting an ANOVA with data from the survey?
If there is relationship between parental income and SAT score, why can't we bring to a close that differences in score are caused by differences in parental income.
Suppose that you are the director of table game operations at a large casino, known especially for its poker room. You are interested in determining the average number of hands the casino should expect per hour during peak hours in the poker room.
Do you believe that the variance of sales before announcement of increasing price is equal to variance of sales after announcement?
How does a multiple base line design differ from a reversal design and give three reason a researcher might chose to use a single case design?
A large industrial firm uses 3 local motels to provide overnight accommodations for its clients. From past experience it is known that 20%: of the clients are assigned rooms at the Ramada Inn, 50% at the Sheraton, and 30% at the Lake view Motor Lodge..
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