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A binomial experiment is given. Decide whether you can use the normal distribution to approximate the binomial distribution. If you can, find the mean and standard deviation. If you cannot explain why.
A survey of adults found that 62% have used a multivitamin in the past 12 months. You randomly select 40 adults and ask them if they have used a multivitamin in the past 12 months.
Select the correct answer below and, if necessary, fill in the answer boxes within your choice.
a) no, because np<5.
b) no because nq<5
c) yes, the mean is ___ and the standard deviation is ___. Round to two decimal places as needed.
a national sample of 2728 adults aged 18 and older surveyed over the telephone using bother landlines and cell phones
a researcher performs a hypothesis test at the 0.05 level of significance. the null hypothesis is p 0.85and the
Normal distribution with a mean value of 150 sec and a standard deviation of 20 sec. The fastest 10% are to be given advanced training. What task times qualify individuals for such training?
suppose n has a binomial distribution with n trials and success rate p while x has binomial distribution with n trials
the kenmont carbide company has two machines that produce a certain product. machine 1 produces 40 of the product and
two points are selected at random independentlyand uniformly along a 1-meterlong stick and the stick is broken at the
Find the probabilities for the following discrete random variables and find the probability that the salad contains more than 5 vegetables on i) a given day and on ii)3 of the next 4 days?
a basket of eggs contains 18 eggs 7 of which are cracked. if we randomly select 8 of the eggs for hard boiling what is
question although the phenomenon is not well understood it appears that people born during the winter months are
What is the probability that a randomly selected tire will have a life of at least 30,000 miles?
Assume you have drawn a simple random sample of 10 students from a college campus and recorded how many hours each student studies (X) during the ¯rst week of December, 2009. Results:
A breakdown of the responses is shown in the accompanying table. Is there evidence at the 10% level to infer that the responses differ among the three groups of employees?
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