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Transportation officials tell us that 80% of drivers wear seat belts while driving. What is the probability that between 538 and 546 drivers in a sample of 700 drivers wear seat belts?
The store manager is under impression that his sales people do more business if they score higher on the social skills test which was administered this year. 5 victims were selected at random. Below, the results are X =test score, Y =weekly sales ..
A standard deviation of 68. a score is considered outstanding if it is at least 420. what is the % of the scores would be outstanding?
What is Bayesian sample size determination for ANOVA and regression with formula?
At 0.01 level of significance, is there evidence that mean price is higher at Whole Foods Market than at Fairyway supermarket? Interpret the meaning of p-value in (i).
The library is to be given 3 books as a gift. The books will be selected from a list of 16 titles. If each book selected must have a different title, how many possible selections are there.
Blood pressure measurements on adult males 30-39 years of age were obtained in a survey of a representative sample of Twin Cities households. To compare the frequency of hypertension in the white and non-white population surveyed, the most appropr..
Three scholarships are available for students. Their values are: $2,000, $2,400, $3,000. Twelve students have applied and no student may receive more than one scholarship. Assume all twelve students are in needs of the funds, how many different..
If you were to accept the null hypothesis, even though the null hypothesis was false, what type of error would you have commited?
Person repeatedly and independent flips the fair coin to decide whether to take the step to left or to right from a point X. Find out expected number of times person returns to X.
Test against the null hypothesis of a one sided alternative that the difference is more than 10 minutes. Use a .1 level of significance (alpha).
Explain can you find out statistical support in this poll for that statement. When it comes to the war in Iraq, among which of the subsiquent statements comes closer to your point of view.
Poisson distribution with a mean of 8.8 tickets per day. Find the probability that less than six tickets are written in one hour given that the police works for 12 hours.
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