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1. A random sample consisted of 36 patients, the mean of their pulse (sphygmus) is 78 times/min, and sd 6 times/min. a) Calculate the 90% confidence interval for the population mean of health men's pulse (sphygmus) in mountainous area. b) Can you conclude that the mean is significantly higher than 72 times /min (Which is the mean of pulse of health men)? .2. Suppose you survey 81 adult American males and record a mean weight of 194 pounds. The sample standard deviation is 35 pounds. a) Please construct a 95% confidence interval for the population mean. b) Suppose a prominent doctor contends that adult American males have a population mean weight of 220 pounds. Does the sample evidence support the doctor's hypothesis?
A statistics instructor collected data on the time it takes the students to complete a test. The test taking time is uniformly distributed within a range of 35 minutes to 55 minutes.
Suppose that the average annual salary for the worker in United States is $39,000.00 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $7,000.00.
Faced with rising fax costs, a firm issued a guideline that transmissions of ten pages or more should be sent by two-day mail instead. Exceptions are allowed, but they want the average to be ten or below. Use Excel to find the right-tail p value
Determine the distributions given below represent a probability distribution. Justify your answer.
Based on the expected value of the lottery ticket, would you pay $1 for a ticket? Round the answer to 3 decimal places. Omit the "tiny_mce_markerquot; sign in your response.)
Assume the results of different games played in the series are independent of each other. Find the p.m.f. of the distribution of N := duration" of the baseball series.
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate u and standard deviation in the formula for the normal approximation to the binomial
She then selects a sample of 102 football players and finds that their average math SAT is 460. Use alpha =.01 to perform the appropriate hypothesis test.
A standard deviation of 100, what would be the cutoff score for selecting the top 10% of applicants, assuming that the standardized test is normally distributed?
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
A candy bar manufacturer is interested in trying to estimate how sales are influenced by the price of their product. To do this, the company randomly chooses 6 small cities and offers the candy bar at different prices.
Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or less. Assume distribution of the lengths of the songs is normal.
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