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The probability that a cellular phone company kiosk sells X number of new phone contracts per day is shown below. x 4 5 6 8 10 P(x) 0.3 0.15 0.35 0.15 0.05 a) Find the mean, variance, and standard deviation for this probability distribution. b) Suppose the kiosk salesperson makes $80/day (8 hours at $10/hour), plus a $25 bonus for each new phone contract sold. What is the mean and variance of the salesperson's daily salary?
A random sample of 25 selected from a shipment indicates a sample average of 7.31 inches. Set up a 95% confidence interval estimate of the true average diameter of the gyroscope in this shipment. Does the population of gyros need to have a diamete..
Use Chebyshev's theorem to determine what percent of values will fall between 58 and 82 for data set with mean of 70 and standard deviation of 4.
An experiment is conducted comparing the effectiveness of a new method of teaching algebra for eighth-grade students. Twelve gifted and 12 regular students are taught using this method. Their scores on a ?nal exam are shown in the following table.
Each customer has probability p of being a home owner independently of all other customers. Let Y be the number of home owners registered. Show that Y~Poisson.
Findout either the given correlation is significant at given level of significance. Illustrate what does sample size have to do with the significance of r.
What is Chicago Gear's required return according to the CAPM?
Psychologists once measured 77 variables on a sample of schizophrenic people and a sample of people who were not schizophrenic. They compared the two samples using 77 separate significance tests.
given are five observations collected in a regression study on two variables.x12691320y1718926231. what percentage of
probability based on normal distribution.1.determine the area under the standard normal curve that lies to the left of
Let S(t) be a periodic square wave as illustrated in the accompanying figure.- Find the probability mass function.
a new extended-life light bulb has an average service life of 770 hours with a standard deviation of 51 hours. if the
The intensity and frequency of hurricanes increases by 2% over the historical projections and claims increase proportionately. Evaluate data using the appropriate test for significance. Rationale for using the test is clear.
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