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The time interval between two successive customers entering a store in a mall is exponentially distributed with a mean of 6.55 seconds.
What is the probability that the time interval is more than 10 seconds?
What is the probability that the time interval is between 10 and 20
seconds?
On a particular day a security camera is installed. Using an entry sensor, the camera takes pictures of every customer entering the shop. It needs 0.75 second after a picture is taken to get ready for the next picture. What is the probability that the camera will miss an entering customer?
How quick should the camera be if the store owner wants to photograph at least 95% of entering customers?
a box of 10 gloves contains three left-handed gloves and seven right-handed gloves. complete parts a through d.a. if
A manufacturer of batteries for "kids' toys" wishes to investigate the length of time a battery will last. Tests results on a sample of 10 batteries indicated a sample mean of 5.67 and a sample standard deviation of 0.57.
Explain how the margin of error is reported in the article, and how and why the margin of error impacts the results of the study.
What is the probability that a random sample of 75 students will provide a sample mean SAT score within 10 of the population mean?
the average age of amtrak passenger train cars is 19.4 years. if the distribution of ages is normal and 24 of the cars
a researcher conducts a hypothesis test to evaluate the effect of a treatment. the hypothesis test produces a z-score
the thickness of photo resist applied to wafers in semiconductor manufacturing at a particular location on the wafer is
For each of the following studies, say whether you would use a t test for dependent means or a t test for independent means.
70 people received a higher score on the second test, 13 a lower score, and 1 received the same score. At the 0.05 significance level, test the claim that the music has no effect on memorization skills.
which of the following is not a decision variable when formulating the project crashing problem as a linear program?the
In a random sample of 400 items, 88 are defective. If the null hypothesis is that 20% of the items in the population are defective, what is the value of ZSTAT?
write the null and alturnative hypothesis identify which is the claim.the results of a recent study show that the
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