Given: (1) 450 0.04 %3D (ii) 451 0.06 (iii) Deaths are uniformly distributed over each year of age. Find é, 50: 1.75
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- Researchers interested in lead exposure due to car exhaust sampled the blood of 52 police officers subjected to constant inhalation of automobile exhaust fumes while working traffic enforcement in a primarily urban environment. The blood samples of these officers had an average lead concentration of 124.32 µg/l and a SD of 37.74 µg/l; a previous study of individuals from a nearby suburb, with no history of exposure, found an average blood level concentration of 35 µg/l. Based on your preceding result, without performing a calculation, would a 99% confidence interval for the average blood concentration level of police officers contain 35 µg/l? Based on your preceding result, without performing a calculation, would a 99% confidence interval for this difference contain 0? Explain why or why not.Life-saving drug: Penicillin is produced by the Penicillin fungus, which is grown in a broth whose sugar content must be carefully controlled. Several samples of broth were taken on three successive days, and the amount of dissolved sugars, in milligrams per milliliter, was measured on each sample. The results were as follows.A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the treatments had the same number of participants, then how many individuals were in each treatment?
- The weights of radish seeds are normally distributed, with µ = 0.12 g and σ = 0.02 g. What is the z-score of a radish seed that weighs 0.093 g? If the contents of a seed packet weighs 30.0 g, approximately how many seeds are in it? Approximately how many seeds in the packet weigh between 0.08 g and 0.16 g.?A sample of patients is tested to determine if they have any hospital borne infections. How large of a sample must be collected to be accurate within 0.01 at the 1% level of significance, if the hospital estimates the true proportion of patients infected is 0.045? p̂ = q̂ = E = Z= n=By what percentage is salary predicted to increase if ros increases by 50 points? Does ros have a practically large effect on salary?
- answer the blank please and the "These residuals do not all have the same sign because in the first two observations listed, the observed efficiency ratios were" ty!Suppose a variable is Normally distributed with μ=345 and sigma σ=30. What proportion of the data has values below 350? Use four decimal places in your answer. Suppose a variable is Normally distributed with μ=345 and sigma σ=30. What proportion of the data has values above 390? Use four decimal places in your answer. Suppose a variable is Normally distributed with μ=345 and sigma σ=30. What proportion of the data has values between 330 and 345? Use four decimal places in your answer.A population with a mean of μ = 8 has SX = 40.How many scores are in the population?
- We have the following data of yields of regular treasury bondsA sample proportion is calculated from a sample size of 201. How large of a sample would we need in order to decrease the standard error by a factor of 7?To seethe effect of a relatively small error in the estimate of the amountof carbon-14 in a sample being dated, consider this hypotheticalsituation: A bone fragment found in central Illinois in the year 2000 contains 17% of its original carbon-14 content. Estimate the year the animal died.