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Question: Are boys more likely? We hear that newborn babies are more likely to be boys than girls. Is this true? A random sample of 25,468 firstborn children included 13,173 boys.
(a) Do these data give convincing evidence that firstborn children are more likely to be boys than girls?
(b) To what population can the results of this study be generalized: all children or all firstborn children? Justify your answer.
An ordinary deck of cards contains 52 cards divided into four suits. The red suits are diamonds and hearts and the black suits are clubs (?) and spades (?).
Explain what is meant by the following statement: ANCOVA offers post hoc statistical control. Provide an example.
an elevator in the apm building can carry about 20 people with a total weight of 3000 lbs. suppose that the average
What is the difference between qualitative and quantitative data? Provide an example of each type. What is a null and alternative hypothesis?
a witness to a hit-and-run accident told the police that the license number contained the letters rlh followed by 3
Compute a 95% confidence interval for the mean using the formula and where is the mean of the ten random numbers.
Compute the expected value of perfect information. Do you think it would be worth trying to obtain additional information concerning which scenario is likely to occur?
A sample of 32 auction prices of grandfather clocks, along with their ages and the number of bidders, is given below.
A survey by KRC Research for U.S. News reported that 37% of people plan to spend more on eating out after they retire.
A random sample of 300 beer drinkers is selected and each member of the sample is asked to choose between two brands of beers: Brand A and Brand B. The results are that 165 prefer Brand A and 135 prefer Brand B.
Specify the sampling frame for this survey, and explain whether or not you think the problem of "using the wrong sampling frame" was a difficulty here.
You try a third time, and again you lose. What's the probability of losing three tosses in a row if the process is fair?
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