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A federal report indicated that 27% of children ages 2 to 5 had a good diet an increase over previous years. How large of a sample is needed to estimate the true proportion of children with good diets within 2% with 95% confidence.
a simple random sample of size n40 is drawn from a population. the sample mean is found to be x with the line above it
1. What is the difference between a randomized experiment and a random sample?
Identify a business related management problem translate the management problem into a hypothesis assumption accurately state the null hypothesis and alternative hypothesis.
Based on data from a dart-throwing experiment, the article "Shooting Darts" (Chance, Summer 1997, 16-19) proposed that the horizontal and vertical errors from aiming at a point target should be independent of one another, each with a normal distri..
Since we utilize the TI calculator and don't need to convert to z-scores to calculate normal probabilities, why would we ever want to know the z-score?
a machine makes a product with 5 of units having faults. in a sample of 20 units what is the probability that at least
Four couples, each consisting of one man and one woman, are seated at a circular table. Assuming that each different order is equally likely, find the probability that:
d. Compare the value of SSE for the least squares line to that of the two lines you found in part b. What principle of least squares is demonstrated by this comparison?
At the 0.05 level, can we con- clude that the geographical distribution of hotline callers could be the same as the U.S. population distribution?
h.g. wells once said statistical thinking will one day be as necessary for efficient citizenship as the ability to read
Compare the median happiness level for the men to that for the women by copying the sentence below and filling in the blanks.
Construct a scatterplot of the relationship between the 2 variables. Plot the regression line on this graph
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