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An allergy medication is successful for 70% of all patients who use it. The medication is given to 200 patients. Let X = number of successful treatments.
a. What are the mean and standard deviation of X?
b. Use the normal curve to approximate the probability that X is 128 or less.
the distance between major cracks in a highway follows an exponential distribution with a mean of 5 miles.a what is the
1 two events cannot be both independent and mutually exclusive. t or f2 the probability that event a and event b will
In doing so, you collect a random sample of 50 salespersons employed by his company, which is thought to be representative of sales staffs of competing organizations in the industry. The collected random sample of size 50 showed that only 18 were ..
What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?
For a certain animal species, the probability that a female will have a certain number of offspring in a given year is given in the table below. Find the expected number of offspring per year.
stephanie robbins is the three hills power company management analyst assigned to simulate maintenance costs. in
experience has shown that 60 of the time a strike by union workers is settled within two-weeks 55 of the time the union
to estimate the average age of a breast cancer patient a random sample of 17 patients were selected from a large
Birth weights of babies in the United States can be modeled by a normal distribution with mean 3250 grams (7.165 pounds) and standard deviation 550 grams (1.213 pounds). Those weighing less than 2500 grams (5.512 pounds) are considered to be l..
Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.
Let X denote the waiting time until the tenth call arrives. What is the pdf of X? What are the moment generating function, mean , and variance of X?
Generate a 95% confidence interval for the difference in mean numbers of cups of coffee consumed between men and women.
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