Find the mean number of kids
The purchasing department of a major company has 100 employees, 22 of whom have no kids, 50 of whom have exactly one child, and 28 of whom have exactly two kids. Find the mean number of kids, find the median.
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Explain the circumstances that can lead to a reversal in a comparison between two groups.
The following data were collected to determine whether the chance that a horse will win a race is influenced by its starting position. Data represent 144 races, each with exactly eight horses in the starting line-up. Starting position 1 is closest
A researcher reports that the time (in minutes) it takes children who are "picky eaters" to finish their vegetables is negatively skewed, with children finishing their vegetables in 4.2±1.0 (M±SD) minutes. Based on Chebyshev's theore
Suppose we find that among couples that have lived together before they marry 60% end in divorce. Further, among couples that did not live together before they marry 45% end in divorce.
52% of the students at a cetain college are females. 5% of the students in this college are majoring in computer science. 2% of the students are women majoring in computer science. if a student is sleected at random, find the conditional probabili
A biology professor gives a surprise quiz consisting of a true/false question followed by a multiple choice question with four possible answers. If both questions are answered with random guesses, what is the probability that both responses are co
Estimate the percentage of Germans who are at least 30 years old but are not yet 40 years old. You may want to construct a histogram to solve for this; don't round in your answer. Please show as much work as possible.
Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. There were 86. Construct a 90 pe
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