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However, the two experiments taken together imply that in this random sequence of n = 100 independent tosses, X = 36 Heads are obtained. According to the chart on page 1-4, the corresponding p-value = 0.0066, which is much less than = .05, suggesting that the combined sample evidence tends to refute the hypothesis that the coin is fair. Explain this apparent discrepancy.
What do confidence intervals represent? What is the most controllable method of increasing the precision of or narrowing the confidence interval? What percentage of times will the mean, or population proportion, not be found within the confidence ..
Identify the null hypothesis, alternative hypothesis, test statistic, p-value or critical value, and the conclusion about the null hypothesis. Use the P-value method.
Using the 0.10 level of significance, is there evidence that the mean shopping time at the local supermarket is different from the claimed value of 22minutes?
At the .05 level of significance, is there evidence of a difference in the mean ontime percentages for the 25 airports between September 2009 and September 2010?
Stating assumptions on which your arguments and conclusions are based, sum up the statistical evidence regarding effectiveness of this diet.
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the oth..
The standard error of the estimate can be used to determine a range within which the independent X variables can be predicted with varying degrees of statistical confidence based on the regression coefficients and the value for the Y variable.
Draw a bell curve for each one of the following normal probability distributions: the standard, the sat and Binet Intelligence scale. Draw a separate bell curve for each one.
Findout the normal model for the given proportions. The professor has every student toss a coin 50 times also calculated the proportion
standard deviation of the heights of young men is about 2.8 inches. suppose (unknown to you) the mean height of all male students is 70 inches. you measure 25 students. what is the sampling distribution of their average height x bar?
In analyzing two independent small samples you notice that the standard deviation for both samples are the same. How does this affect the S2p (the pooled variance)? Explain your answer.
There are infinitely many prime numbers p of the form 4n+3. In other words, show that there exist infinitely many positive integers, n, such that the number 4n+1 is prime.
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