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Let Yi = b1 + b2xi + ei, i = 1, .. ., m, Y*j = b*1 + b*2 x*j + e*j, j = 1, . .., n, where the e's and e*'s are independent r.v.'s distributed as N(0, s 2). Use Exercises 16.3.3, 16.3.4 and 16.5.1 to test the hypotheses H1 : b1 = b*1, H2 : b2 = b*2 against the corresponding alternatives A1 : b1 ¹ b*1, A2 : b2 ¹ b*2 at level of signi?cance a.
For adults 60 years or older, they found a mean daily intake of 721 mg with a standard deviation of 454 mg. Using these values for the mean μ and standard deviation σ for the U.S. population:
question a local tire dealer wants to predict the number of tires sold each month. he believes that the number of tires
an experiment was designed to estimate the mean difference in weight gain for pigs fed ration a as compared with those
A company tracked the number of complaints it received during the first 6 months of last year, as shown in the following table:
Waiting time is normally distributed. Calculate the value of the test statistic for your random sample rounded to two decimal places?
What is the 95% confidence interval for the proportion of smokers in the population (to 4 decimals)?
In 2007, the IRS audited 1.77% of individual tax returns with income greater than $100,000. What is the probability that two randomly selected returns with income greater than $100,000 will be audited?
what sample size should be used in the funding decision study? Use σ = $4000 as a planning value. ________________
three machines i ii and iii manufacture 30 30 and 40 respectively of the total output of certain items. of them 43 and
At the 0.01 level, is the bank loan financially sound (should the bank ask for additional collateral)? What is the decision rule?
Determine whether or not the average age of the evening students is significantly different from 21. Use a 0.1 level of significance.
Tthe true population mean when different samples of the same size are taken. Note that the variability of the sample mean is LESS than that of individual observations Does this makes sense?
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