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The weights of a random sample of cereal boxes that are supposed to weigh one pound are listed here. Estimate the variance of the entire population of cereal box weights with 90% confidence 1.05 1.03 .98 1.00 .99 .97 1.01 .96
About 5.5 percentage points in either direction from what would have been obtained by seeking out all Ohio State University female students." Do your results agree with this statement?
Why is it important to simplify radical expressions before adding or subtracting? How is adding radical expressions similar to adding polynomial expressions? How is it different? Provide a radical expression for your classmates to simplify.
Then suppose that a sample of 4000 women had produced the sample mean 275, and again give the 95% confidence interval for the population mean. What can you say about the effect of sample size on confidence intervals?
You randomly select 425 students and ask each one what the top motivation is for using a credit card. Can you conclude that there has been a chagne in the claimed or expected distribution? Use a =0.025.
You are using a significance level of α = 0.05 to test a claim that p > 0.5. Your sample is a simple random sample of size n = 49. Calculate β for the test, assuming that the true population proportion is 0.7 and showing all work.
If one of these consumers is randomly selected, what is the probability that the person prefers design A and is under 25?
Let Y denote the number of students on his bus. Compute the expectations and variances of X and Y:
If a random sample of 5 observations from one population results in a standard deviation of 12 and the other random sample of 7 observations results in a standard deviation of 7.
We are interested in comparing the proportions of males and females who think earning a large salary is very important to them. I surveyed 200 of each gender and recorded their answers to the question as yes or no.
For a candidate to win in a congressional district, he has to have won over half of the vote. The Republican candidate takes a poll to assess his chances in a two-candidate race.
How many individuals will it need to sample to achieve this level of accuracy and confidence?
Overall, the amount of work-hours involved in the festival preperation is normally distributed around 100 hours withn a standard deviation of 12 hours.
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