Chapter 9: Problem 470
Find the mode of the sample \(14,19,16,21,18,19,24,15\) and 19 .
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Chapter 9: Problem 470
Find the mode of the sample \(14,19,16,21,18,19,24,15\) and 19 .
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In the Idaho State Home for Runaway Girls, 25 residents were polled as to what age they ran away from home. The sample mean was 16 years old with a standard deviation of \(1.8\) years. Establish a \(95 \%\) confidence interval for \(\mu\), the mean age at which runaway girls leave home in Idaho.
Find the probability that a person flipping a balanced coin requires four tosses to get a head.
Let \(\mathrm{T}\) be distributed with density function \(f(t)=\lambda e^{-\lambda . t} \quad\) for \(t>0\) and \(=0\) otherwise If \(S\) is a new random variable defined as \(S=\) In \(\mathrm{T}\), find the density function of \(\mathrm{S}\).
Let \(\mathrm{X}\) be a random variable whose value is determined by the flip of a fair coin. If the coin lands heads up \(\mathrm{X}=1\), if tails then \(\mathrm{X}=0\). Find the expected value of \(\mathrm{X}\).
The Harvard class of 1927 had a reunion .which 36 attended. Among them they discovered they had been married an average of \(2.6\) times apiece. From the Harvard Alumni Register Dean Epps learned that the standard deviation for the 1927 alumni was \(0.3\) marriages. Help Dean Epps construct a 99 per cent confidence interval for the marriage rate of all Harvard alumni.
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