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Lisa Mendes and Brad Lee work in the sales department of an AT&T Wireless Store. Lisa has been signing in an average of 46 new cell phone customers every month with a standard deviation of 23, while Brad signs in an average of 56 new customers with a standard deviation of 15. The store manager offers both Lisa and Brad a $90 incentive bonus if they can sign in more than 90 new customers in a month. Assume a normal distribution to answer the following questions. Use Table 1.
a. What is the probability that Lisa will earn the $90 incentive bonus? (Round "z" value to 2 decimal places and final answer to 4 decimal places.)
b. What is the probability that Brad will earn the $90 incentive bonus? (Round "z" value to 2 decimal places and final answer to 4 decimal places.)
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
the data on the number of chocolate chips per bag for 42 bags of chips ahoy cookies were obtained by the students in an
Make a plot of the ratio of the number of boys born per year to the number of girls in the U.S. What do you see? In what year did we see the most total number of births in the U.S.?
In testing a new drug, researchers found that 10% of all patients using it will have a mild side effect. A random sample of 12 patients using the drug is selected. Find the probability that: exactly three will have this mild side effect.
question in a given large town the number of children x in a family chosen at random has the following
How much should you be willing to pay for this deal? Do you think you would actually pay that much? Why? Expected Value:? Pay it? Why?
the amounts of soft drink machine is designed to dispense for each drink are normally distributed with a mean of 11.7
two balanced coins are flipped. what are the expected value and variance of the number of heads
The cost of gasoline will decrease or stay the same over the next 30 days because of summer holiday travel. What is your alternative hypothesis statement?
The University Bookstore is owned and operated by State University through and Independent Corporation with its own board of directors.
Many samples, each of 100 observations, are drawn from a population in which there is a correlation of 0.70 between two variables. How often would you expect to find a statistically significant correlation?
However, in situations where growth has not eventually occurred, new operating systems have been announced 10% of the time. Based on all these facts, what is the probability that sales will grow by 10%?
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