In the normal distribution, what percentage of scores fall within one standard deviation of the mean?
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In the normal distribution, what percentage of scores fall within one standard deviation of the mean?
What is the ratio of the number of composite integers to the number of prime integers in the interval [1,10]?
If the temperature drops by 18o Fahrenheit in a given day, how much did it drop in degrees Celsius?
If the mean and standard deviation of the data set {12,14,19,x} are 15 and √26, respectively, x = ?
What is the probability that a fair coin will show “heads” 2 out of 4 times?
Two teams are playing a best-of-five series, which ends as soon as either team wins three games. If the two teams are equally likely to win a game, regardless of the outcomes of the others, what is the probability that the series ends after the first three games?
If the mean of 15, x, 17 and 12 is 15, what is the median of these four values?
Which of the following expressions can be simplified such that the result is equal to 1?
Photo attributed to melburnian.
What is the value of 10-2 + 10-3 + 10-4?
One-hundredth of a mile equals approximately how many meters?