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In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities.
It is estimated that 3.7% of the general population will live past their 90th birthday. In a graduating class of 754 high school seniors, find the following probabilities. (Round your answers to four decimal places.)
(a) 15 or more will live beyond their 90th birthday
(b) 30 or more will live beyond their 90th birthday
(c) between 25 and 35 will live beyond their 90th birthday
(d) more than 40 will live beyond their 90th birthday
provide an example of where you think a graphical display could be used incorrectly. what ramifications do you think
Fast Service Store has maintained daily sales records on the various size 'Cool Drink' sales. These are shown in the following table:
if 3 different factor levels show a lot of variation between levels this impliesa a large amount of error within each
In an online survey of 4001 respondents, 8% were classified as productivity enhancers who are comfortable with technology and use the internet for its practical value. Suppose you select a sample of 400 students at your school, and the population ..
twelve dieters lost an average of 12 pounds in 6 weeks when given a special diet plus a fat-blocking herbal formula. a
question two builders a and b are competing for a contract to construct a new office block. each can bid either
mean of peak expiratory flow for children without asthma is 306. investigator wants to see whether children with
Mean = 14.2, s² = 5.92 and sum of X squared EX² = 2941.60. What can be concluded about age differences in problem solving ability?
What is the appropriate t-test to conduct and should the null hypothesis be rejected
when an instant replay system for tennis was introduced for a tournament men challenged 460 reference calls and 184 of
Assume that the lives of all such bulb (approximately) normally distribution. Make the 99% confidence intervals for the variance and standard deviation of the lives of all such bulbs.
in exercises 9.55-9.60 we have given the value obtained for the test statistic z in one mean z-test. we have also
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