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The probability that a call received by a certain switchboard will be wrong number is 1 per 100 calls. Use poisson approximation to the binomial distribution to find the probability that among 120 calls recieved by the switchboard.
1. There are no wrong #'s2. Exactly 1 wrong #3. Exactly 2 wrong #'s4. Exactly 3 wrong #'s5. At most 3 wrong #'s
Find the 90% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to be accurate within 10 peaches per tree?
A manager at a local manufacturing company has been monitoring the output of one of the machines used to manufacture small aluminum plates.
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
A random sample of n=36 is taken resulting in a sample mean of 63 and s=9. conduct the appropriate hypothesis test and make a decision.
A prison official wants to estimate the proportion of cases of recidivism. In examining 250 convicts there are 65 cases. with 99% confidence interval what is the range? How do you figure this type of problem?
Determine the number of monic irreducible polynomials of degree 4 in F_q without using the Moebius Inversion Formula.
Make a depreciation schedule. A $1,200 postage printing system depreciated using the straight-line method over 4 years.
What is approximately the largest sample mean of another sample of n= 16 participants you would expect to obtain from this finite population?
Assuming the percentages are based on independant simple random samples of 1,000 first year college students drawn each year.
A randomized controlled trial was designed to compare the effectiveness of splinting against surgery in the treatment of carpal tunnel syndrome.
What is the optimal strategy for producing 500 tons of newsprint pulp, 600 tons of packaging pulp, and 300 tons of print stock quality pulp at minimum cost?
Compute the median number of dependents?
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