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Question:
Kindergarten children have heights that are approximately normally distributed about a mean of 38.3 inches and a standard deviation of 1.6 inches.
If a random sample of 27 is taken, what is the probability that the sample of kindergarten children has a mean height of less than 40.5 inches?
Find the probability that all 3 ignition systems are good.d- which is better: the answer from part (b) or the answer from part (c)? why?
Explain whether the authors used a population or a sample. Explain how this could have affected the results. If a sample was used, was it representative of the entire population? Why or why not?
ABC Insurance Co. estimates that 80% of drivers wear seat belts regularly. They also estimate that 50% of drivers are over age 35.
You want to compute a 0.80, 0.92, or a 0.98 confidence interval for µ when σ is known, and sampling is from a normal distribution, what values for c should you use in Equation (4.8)?
An investor owns three common stocks. Each stock, independent of the others, has equally likely chances of (1) increasing in value, (2) decreasing in value, or (3) remaining the same value.
If you were to repeat part (a) for the mobile phone gamers, would the necessary sample size be smaller, equal to, or larger than the sample size of tablet gamers? Explain your answer without doing any calculations.
Identify the null and alternative hypotheses from the player's point of view. - Is there enough evidence from this month's data to reject the null hypothesis at the 5% significance level?
Calculate η 2 , the percentage of variance accounted for by treatment.
Identify 5 variables of interest to healthcare managers. Select and define one variable and include your rationale for selecting this variable. What is the difference between a dependent and independent variable?
let z be a standard normal random variable. use the calculator provided to determine the value of c such thatp z less
a true coincidence at disneyworld wisconsin has 5.4 million residents. on any given day the probability is 15000 that a
In each situation, explain whether the selection is made with replacement or without replacement.- The three digits in the lottery in given Example.
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