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On a recent quiz, the class mean was 69 with a standard deviation of 3.6. Calculate the z-score (to 4 decimal places) for a person who received score of 72.
z-score:
on friday wall street traders were anxiously awaiting the federal governments release of numbers on the january
Construct a confidence interval for the population proportion p, given n = 182, x = 135; 95%. Suppose the random variable X has a normal distribution with mean 9.0 and variance 49. The probability that X takes on a value of at least 18 is approxim..
A simple random sample with n = 55 provided a sample mean of 28.5 and a sample standard deviation of 4.4. (Round your answers to one decimal place.)
the scores on an economics examination are normally distributed with a mean of 74 and a standard deviation of 16. if
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The standard deviation of a list of numbers is a measure of how much the numbers deviate from the averag
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Use a one-factor ANOVA to test the null hypothesis that population abundance is equal among these 6 species. Be sure to interpret your results and explain your reasons for declaring them significant or not significant. Use either Bartlett's test o..
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