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Random digit dialing
Most sample surveys use random digit dialing equipment to call residential telephone numbers at random. The telephone polling ?rm Zogby International reports that the probability that a call reaches a live person is 0.2.9 Calls are independent.
(a) A polling ?rm places 5 calls. What is the probability that none of them reaches a person?
(b) When calls are made to New York City, the probability of reaching a person is only 0.08. What is the probability that none of 5 calls made to New York City reaches a person?
Is the slope coefficient in the linear regression model between temperature and fuel consumption statistically significant at alpha=.05 and 0.01? How do you know? Show your test.
provide two data setsa. construct a scatterplotb. find the value of the linear correlation coefficient r then determine
Construct a 89% confidence interval estimate of the overall percentage of the B.C. population in favour of such a casino and what size of sample would be required to do this
a consumer organization examined the relationship between the weight of a car in thousands of pounds and the fuel
the waiting time at a certain bank is approximately normally distributed with a mean of 3.7 min and a standard
Evette has 41 1/2ft. of string. She wants to cut it into pieces 3 3/4ft. long. How many pieces of string will she have? how much string remains, if any?
in a raffle with 100 tickets 10 people buy 10 tickets each. ifthere are 3 winning tickets drawn at random find the
Convert each of the following z intervals to x intervals.
Find the annual premium. Find the reserve at time 2, assuming the process is at that time in (i) state 0, (ii) state 1, (iii) state 2.
Diastolic blood pressure (DBP) values were measured for 150 patients using two medical devices. The mean DBP values using the two devices are 120 and 122 respectively. Also the standard deviation of the difference of the measurements is 0.634. Te..
a resercher wishes to estimate with 90 confidence the proportion of adults who have high-speed internet access. her
Connie's Apparel was one of Flashner's clients. Connie's Apparel made a profit last year. What is the probability that it was given an original rating of poor?
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