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1. In your own words explain the difference between a point estimate and an interval estimate of a parameter? Which is better? Why?
2. What information is necessary to calculate a confidence interval? Is the size of the population relevant when one is determining the sample size for a confidence interval? What is necessary to determine the sample size?
3. A researcher is interested in estimating the noise levels in decibels at area urban hospitals. He wants to be 90% confident that his estimate is correct. If the standard deviation is 4.8, how large a sample is needed to get the desired information and to be accurate within 0.65 decibels?
1) A certain brand of batteries has a lifetime that has a normal distribution with a mean of 3,800 hours and a standard deviation of 390 hours. b) What lifetime should the manufac
I''m not sure how to calculate the income tax expense.
Use inductive reason to find a pattern for the answers. 9x9=81 99x99=9801 999x999=998001 9999x9999=99980001 99999x99999=?
A researcher working for a drug company is interested in investigating the effect of storage on the potency of one of the company's drugs. 10 freshly produced bottles of the drug a
In fowl,the genotype rrpp gives single comb, R_P_ walnut comb, rrP_ pea comb, and R_pp rose comb. a. What comb type will appear and in what proportions in F and F2 if single- co
#quea national poll of 1836 respondents indicated that 36% support the NDP. Test whether this is sufficient evidence to show that the NDP support has increased since the election.
What would be the cutoff score to indicate a score that is in the top 15% of the scores on a test with a mean of 100 and a standard deviation of 15?
What is Degrees of Freedom : While comparing the calculated value of X2 with the table value we have to determine the degrees of freedom. By degrees of freedom we mean the number
The χ 2 test is one of the most popular statistical inference procedures today. It is applicable to a very large number of problems in practice which can be summed up under th
2. Two disks, each of radius 10.0 cm, are charged so that one has a charge of +10.0 nC and the other has a charge of -10.0 nC. The disks are then placed with their flat faces facin
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