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The city manager of Shinbone has received a complaint from the local union of firefighters to the effect that they are underpaid. Not having much time, the city manager gathers the records of a random sample of 27 firefighters and finds that their average salary is $38,073, with a standard deviation of $575. If she knows that the average salary nationally is $38,202, how can she respond to the complaint? Should she use a one-tailed test in this situation? Why? What would she say in a memo to the union that would respond to the complaint?
Particular brand that they buy. A retailer has ordered a consignment of 5000 such lamps for its chain store nationwide. What is the probability that, the number of defective lamps will be 500 or less?
a charity receives 1700 contributions. contributions are assumed to be independent and identically distributed with
According to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Suppose local monthly household cell phone bills are normally distributed with a standard deviation of $11.35.
3.genotypes aa aa and aa occur with probabilities ?1 ?2 ?3. for n3 independent observations the observed frequencies
in a pizzeria they offer eight different toppings for a pizza. moreover you are allowed to double any topping if you
suppose were testing a new antibacterial cream formulation cs on a small cut made on the inner forearm. we know from
A scatterplot showed a linear relationship with a correlation between age and body temperature of -0.313. Using this value, characterize the relationship between age and body temperature.
Is this an observational or an experimental study?- What is the variable of interest?- Describe a technique to randomly assign each rose to a group.
An aptitude test has a mean score of 80 and a standard deviation of 5. The population of scores is normally distributed What raw score corresponds
Suppose X‾t = 5.1 with sw = 7 based on n = 25. Test the hypothesis that the population trimmed mean is exactly 4.8 with α = .01.
Tree diagram for a probability experiment - Identify the sample space of the probability experiment and determine the number of outcomes in the event. Show a tree diagram if it is appropriate.
suppose we draw 13 cards out of a deck of 52. what is the expected value of the number of aces we
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