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A research manager at Coca-Cola claims that the true proportion, p, of cola drinkers that prefer CocaCola over Pepsi is greater than 0.50. In a consumer taste test, 100 randomly selected people were given blind samples of Coca-Cola and Pepsi. 58 of these subjects preferred Coca-Cola. Is there sufficient evidence at the 5% level of significance to validate Coca-Cola's claim? Conduct an appropriate hypothesis test using (i) the p-value method and (ii) the rejection point method.
the mean of a normal probability distribution is 60 the standard deviation is 5. refer to the table in appendix a.1.
foofy obtained a significant fobt from an experiment with five levels. she therefore concludes that changing every
What statistical test would you use to test if the two treatments were equally effective? What statistical program would you use to obtain the results?
Convert these data to relative frequency distributions, one for the total United States, the other for the western states. Do the results appear to suggest any differences between total U.S. prices and those in the western states?
Pick one of the 2 groups and explain the difference between the two types within the group?
Two fair dice are rolled. Let one of the dice be red and the other green so that we can tell them apart.- Determine whether these two random variables are independent or not.
If 2 circuit boards are selected at random without replacing the first, what is the probability both circuit boards are defective?
Using the table from part (a) or the tree diagram from part (b), find the proportion of people who will test positive for the disease.
some studies have shown that in the united states men spend more than women buying gifts and cards on valentines day.
What's the standard error of the difference in the two proportions?- Construct a 95% confidence interval for this difference.
The probability that the score of a randomly selected examinee is between 400 and 480, rounded to three decimal places, is
The probability that a claim is filed in a given year is 0.05, independently of preceding years. What is the PMF of the total premium paid up to and including the year when the first claim is filed?
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