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Event A occurs with probability 0.1 and event B occurs with probability 0.5. What is the maximum probability that the intersection of A and B can have?
Conduct a test of hypothesis to determine whether the mean payroll of the teams was different from 80.0 million. Use the significance level.
A large firm has 85% of its service calls made by a contractor, and 10 of these calls result in customer complaints. The other 15% of the service calls are made by their own employees, and these ca
An analyst must decide between two different forecasting techniques for weekly sales of roller blades: a linear trendequation and the naive approach. the linear trend equation isFt = 124 + 2t,
A report from the U.S. Department of Justice reported the percent changes in federal prison populations in 21 northeastern and midwestern states during 2006. Using appropriate graphical displays and
The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized measure used in longitudinal follow-up of high-risk infants.
Customers arrives at a sales counter manned by a single person according to a poisson process with a mean rate of 20 per hour. The time required to serve a customer has an exponential distribution
Do you agree or disagree with the study? Support your case using statistics. Present a summary of at least 4 sentences defending your position.
Let C and D be two events in sample space with P (C)=0.12 P(D)=0.36 P (C&D)=0.03 Determine the conditional probability P(C|D). Can you please have 2 examples each for the experimental and observa
1) An important measure of the performance of a locomotive is its "adhesion," which is the locomotive's pulling force as a multiple of its weight. The adhesion of one 4400-horsepower diesel locomoti
For the demand equation below, x represents the quantity demanded in units of 1000 and p is the unit price in dollars. 5p+4x-100=0; p=10 (a) Sketch the demand curve. (Sketch the curve as a segment.)
Develop a decision table for this problem. What is the best decision?
A cutting tool wears out with a time to failure that is normally distributed with a mean of 10 working days and a standard deviation of 2.5 days. Determine its design life for a reliability of 0.99
In the game of "craps" two dice are thrown and the outcome of a bet is based on the sum of the two dice. If you bet $1 that the sum is "seven" then you win $4 or lose your dollar. The probability
Determine the area under the standard normal curve that lies to the left of (a) Z=-1.03, (b) Z=-1.42, (c) Z=-0.77, and (d) Z=0.66
This compared with 72 males in 145 "purebred" offspring of matings between members of the same species. Is the proportion of males and females different in the purebred offspring than in the hybrid
If a given mesokurtic distribution has a mean of 100 and a standard deviation of 10, Find the approximate value of the range.
What is the decision rule for a hypothesis test about the dierence between two population means if the p -value is used?
The mating preferences were measured in nine different populations, and the preference was measured by an index that is zero if the population shows no preference for mating by size, positive if the
What is the probability that a randomly selected person who tests positive for the predisposition by the test actually has the predisposition?
Sometimes the geometric random variable is defined to be the number of trials, X, preceding the first success. Write down the corresponding pdf and derive the moment-generating function for X two wa
A particular company offers a $500 deductible policy. If the company wishes its expected profit to be $100, what premium amount should it charge?
The life span of 3 randomly selected tires is 32,800 miles,41,200 miles and 37,000miles. Using the empirical rule find the percentile that corresponds towatch life span
In developing a confidence interval for the population standard deviation, ? , we make use of the fact that the sampling distribution of the sample standard deviation s is not the normal distributio
What sample size would be needed to ensure that we could estimate the true mean salary of all production managers with more than 15 years experience within $4200 if we wish to be 95% confident?