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The real estate assessor for a county government wants to study various characteristics of single family houses in the county. a random sample of 70 homes reveals that the average heated area of the house is 1759 square feet with a standard deviation of 380 square feet. estimate the 98% confidence level the average heated area of all single-family homes in the county
Fnd the probability that the face showing up a six turns up between 10 and 30 times. Find the probability that the sum of the face values of the 100 trials is less than 250.
For a recent year, the mean fare to fly from Charlotte, North Carolina, to Seattle, Washington, on a discount ticket was $267. A random sample of round-trip discount fares on this route last month gives:
A manufacturer claims that he makes light bulbs each of which has a 0.9 probability of operating successfully when plugged in.
Which probability distribution is suitable when sampling without replacement?
Vehicles heading west on Front Street may turn right, left, or go straight ahead at Elm Street. The city traffic engineer believes that half of the vehicles will continue straight through the intersection.
Rachel's Z score indicates that she is below average for those who took the ACT
When only the value-added time is considered, the time it takes to build a laser printer is thought to be uniformly distributed between 8 and 15 hours.
Let A and B denote genetic characteristics and suppose that the probability is 1/3 that an individual chosen will exhibit A, 2/5 that he or she will exhibit B. Assume that these characteristics occur independently. What is the probability that an ind..
Test at .01 level of significance if mean number of number of calories for Brand A 16 oz. yogurt cups is greater than mean calories for Brand B 16 oz. yogurt cups.
With a mean of $8.90 and a standard deviation of $5.70. She waites on 30 parties. What is the probability that she will earn at least $350?
Of the students who scored around 50 on the midterm, about what percentage were in the top 25% of the class on the final?
Let x be a nilpotent element of the commutative ring R i.e. x^m for some positive integer m. Prove that x is either zero or a zero divisor
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