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A coin with the probability of heads being 0.8 is tossed 4 times.
(a) What is the probability that the coin shows "tails" all the four times?(b) What is the probability that 3 heads are obtained?(c) What is the probability that at least 2 consecutive heads are obtained?
You are asked to conduct a study to determine if gender has any bearing on the choice of a dog or cat as a pet. You take a random sample of 350 adults and ask each what kind of pet they would prefer, a dog or a cat?
Suppose the graduate exam is normally distributed with a mean of 500 and a standard deviation of 200. If a test taker is randomly selected, what is the probability he or she scores 750 or better?
A least squares linear trend line is just a simple regression line with the independent variable being time (months or years for example).
Consequently, the consultants decide to test the null hypothesis ? ? 0 H : 33.7 . What is the value of the test statistic for testing this null hypothesis?
How do we calculate the upper and lower limits of one sided and two sided 95% confidence level of difference in proportion when comparing two groups in clinical research.Could You kindly help with some formula for calculating these.
Arnold Palmer and Tiger Woods are two of the best golfers to ever play the game. To show how these two golfers would compare if both were playing at the top of their game, the following data provide the results of 18-hole scores during the PGA tou..
If in a random poll of 250 residents, 150 residents were in favor, how accurate is this result as an estimate of the proportion?
The computer breaks down x times during t hours, it costs 50x2 dollars to fix it. How should the company select t in order to maximize the expected profit?
Compare equations with one variable to equations with two variables. How are they alike? How are they different? What if an equation had three variables?
Caculate the expected value of the profit made by the insurance company. Many call this kind of situation a win win opportunity for the insurance company and the promoter. Do you agree? Explain.
Using this he gives a cost estimate of $24,000 for a new order for 500 units. Is this a reasonable cost estimate? Explain why or why not. Looking at the data on file, can you give a better cost estimate?
A researcher is using a chi-square test to determine whether there are any preferences among four brands of cola. With alpha = .05 and a sample of n = 30, what is the boundary for the critical region for the hypothesis test.
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