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Suppose you flip a fair coin 10 times and it results in 1 tail and 9 heads. If you toss that coin again what is the probability of obtaining a head?
(a) 9/10(b) 0.5^11(c) 1/10(d) 1/9(e) 1/2
The t-statistics that was obtained in the study of 400 subjects was t=20, rejecting the null hypothesis and showing that the drug has a beneficial effect. Why was management upset?
Consider binomial distribution with 14 identical trials, and probability of success of 0.4.
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.
insurance companies track life expectancy information to assist in determining the cost of life insurance policies.
the length of an injection-molded plastic case that holds magnetic tape is normally distributed with a length of 90.2
Is there evidence of violations of the usual ANOVA assumptions of equal variances and normal populations? Set up and perform appropriate TESTS at the α = 0.05 level of significance.
A scientist wants to estimate the proportion of plants with berries growing in a particular region. They want to be within 6% of the true proportion.
Researchers are studying the absorption of two drugs into the bloodstream. Each drug is to be injected at three dosages. There are 24 people in the study, and they are randomly divided into six groups.
What is the probability that in your random sample of 50 students, between one thirds and two thirds favor the new policy?
In multi-choice test, each question has four options. Students wil get 10 points for each correct answer; lose four points for each incorrect answer; and receive no points for unanswered questions.
Quality control engineer has been checking output by almost continuous sampling as abnormal condition began. Determine the probability that in sample of 10 pieces.
Test, at the 5% level of significance, whether the population standard deviation of hours spent studying is less than 10. Use the Critical value approach.
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