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A scientist studying babies born prematurely would like to obtain an estimate for the mean birth weight, U(mean) , of babies born during the 24th week of the gestation period. She plans to select a random sample of birth weights of such babies and use the mean of the sample to estimate U (mean) . Assuming that the population of birth weights of babies born during the 24th week has a standard deviation of 2.5 pounds, what is the minimum sample size needed for the scientist to be 95% confident that her estimate is within .5 pounds of U (mean)?
Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).
What is the null hypothesis? What is the research hypothesis?
On the TV show Deal or No Deal, a contestant chooses from among 26 suitcases, each containing a dollar amount. These dollar amounts are: (a) Using only the table, determine the median prize amount.
two marbles are selected one at a time from a jar of marbles containing 10 black 10 brown 10 white and 10 green
A chemical reaction is run 12 times, and the temperature xi (in oC) and the yield yi (in percent of a theoretical maximum) is recorded each time. Compute the least-squares estimates and. Compute the error variance estimate s2. Find 95% confidence in..
Using this he gives a cost estimate of $24,000 for a new order for 500 units. Is this a reasonable cost estimate? Explain why or why not. Looking at the data on file, can you give a better cost estimate?
Suppose you manage Tennessee Grilled Pork, a fast food restaurant specializing in pork sandwiches and pork chops on a stick. You have decided to build a new restaurant and have 2 possible site locations
Three families, each with three members, are lined up at random for a picture. What is the probability that members of each family happen to be together (that is, not separated by someone from another family) in the picture?
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
For the mold described in (g), can you find the probability that it's COST value will exceed $150,000? If yes, obtain this probability. If no, why not?
How many departments would they need to survey to achieve this level of accuracy with 95% confidence?
age at onset of dementia was determined for a sample of adults between the ages of 60 and 75. for 15 subjects m 67.2
Give the expected value and standard deviation of defective shoes in the ShoeFit store order.
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