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Fourty-five percent of households say they would feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. Find the probability that the number that say they would feel secure is (a) exactly five, (b) more than five and (c) at most five.
Standard deviation of the sampling distribution of sample proportion is 0.025. However, the report did not indicate what the sample size n was. What was it?
the p-value for an analysis of variance f test statistic is which probability from the f
the image of the public library is constantly changing and their online services continue to grow. usage of the
Using a 3-month weighted average with the most recent month weighted 0.60, the next most recent month weighted 0.30, and the third month weighted 0.10, forecast the fund price for month 21.
One measure of the overall sampling error in the entire distribution of sample means is the
The probability that the speed will be more than 70 words per minute is 0.15. Find the mean and the standard deviation of typing speed.
A hypothesis test is performed to test the claim that a population proportion is greater than 0.7. Find the probability of a type II error, β, given that the true value of the population proportion is 0.72. The sample size is 50 and the significan..
430 randomly selected light bulbs were tested in a laboratory, 224 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours.
Suppose that observations X1, X2,..., Xn are made on a process at times 1, 2,..., n. On the basis of this data, we wish to test H0: the Xi 's constitute an independent and identically distributed sequence
according to the mendelian theory of inherited charateristics a cross ferilizatiopn of related species of red and white
The chance that all 50 residents in a neighborhood end up being the sample of residents selected is: the population of the suburb divided by 50.
What is the difference between a one-tail and a two-tail test? How do we identify each? What is meant by a p-value?
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