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Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 491 teens with profiles found that 334 included photos of themselves.
(a) Give the 90% large-sample confidence interval for the proportion p of all teens with profiles who include photos of themselves. Large-sample Interval:?
(b) Give the plus four 90% confidence interval for p . (The plus-four interval always pulls the results away from 0% or 100%, whichever is closer. Even though the condition for using the large-sample interval is met, the plus four interval is more trustworthy.) Plus four Interval?
A soft drink machine outputs a mean of 24 ounces per cup. the machines output is normally distributed with a standard deviation of 2 ounces. what is the probability of filling a cup between 21 and 26 ounces.
Same chance of being selected as does any other group. What is the probability that at least one of the shifts will be unrepresented in that sample of workers?
He is twice as likely to visit city X than the other city. Obtain the transition probability matrix. Also determine the proportionate visits by him to each of the cities in the long run.
a certain brand of candies have a mean weight of 0.8617 g and a stand deviation of 0.0521 based on a sample of a
blood type ab is found in only 3 of the populationdagger. if 205 people are chosen at random find the probability of
To speed up the process in a blood testing procedure, blood samples from 3 people are combined into one mixture. The mixture will on test negative if all individual samples are negative. If the probability than an individual sample tests positive ..
q1.a researcher in the west coast of the u.s. wants to estimate the amount of a newly discovered antibody in human
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Rolling a die Simulate 36 rolls of a fair die. Give the relative frequency and the corresponding theoretical probability of each of the outcomes and compare them.
a rental car company claims the mean time to rent a car on their website is 60 seconds with a standard deviation of 30
a child types the letters q w e r t y randomly producing 1000 letters in all. what is the expected number of times that
find the transient current a general solution in the rlc circuit given below given r0.2? l0.1h c2f and e754sin0.5t
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