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64% of men consider themselves professional baseball fans. You randomly select 10 men and ask each if he considers himself a professional baseball fan. Find the probability that the number who considers themselves baseball fans is (a) exactly eight (b)at least eight and (c) less than eight. If possible use technology to find the probabilities.
a) P(8)=
b) P(X,=8)=
c) P(x<8)=
A process has a capability index of 0.40. This index is interpreted to mean that the process is:
To cross a single lane of moving traffic, we require at least a duration d. Successive car interarrival times are independently and identically distributed with probability density function fT (t).
A market researcher is interested in knowing the type of training that works best for DVD users. Thirty consumers are randomly selected from a population of known DVD owners (i.e., users).
Construct the 95 percent confidence interval for the difference between the two population means.
Suppose the random variable x is best described by a normal distribution with µ = 24 and σ = 2.7. Find the z-score that corresponds to each of the following x values.
What is the idea of "least squares"? What is the connection between "least squares" and linear regression?
what is the sample space of all possible outcomes? Are the outcomes equally likely?
Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. Here are data on the "penetrability" of the same type of soil at 2 levels of compression.
Use the normal approximation to the binomial distribution and part (b) to answer the following question: What is the probability that a seat will be available for every person who shows up holding a reservation?
If there is relationship between parental income and SAT score, why can't we bring to a close that differences in score are caused by differences in parental income.
Given the binomial distribution with n = 23 and p = 0.79, would the normal distribution provide the reasonable approximation? Why or why not?
The assembly time for a product is uniformly distributed between 6 to 10 minutes.
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