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The interquartile range and the standard deviation are two different measures of spread. Which measure do you think is more affected by outliers? Explain.
a random variable is normally distributed with a mean of 25 and a standard deviation of 5. if an observation is
in a certain class of students there are 13 boys from wilmette 3 girls from kenilworth 11 girls from wilmette 6 boys
The director of purchasing asked for samples of 175 from each manufacturer. The numbers of acceptable and unacceptable bulbs from each manufacturer are shown below. At the 0.05 significance level, is there a difference in the quality of the bulbs?
A random sample of gasoline taxes (in cents) is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 44.7 cents?
The delivery times and the number of cases delivered were recorded in the delivery file: Develop a regression model to predict delivery time, based on the number of cases delivered.
The largest value in a set of data is 160, and the smallest value is 70. If the resulting frequency distribution is to have six classes of equal width, what will be the class interval?
For each of the following, identify the scale of measurement (NOIR) and the best measure of central tendency for the data.
what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds True?
Give a simplified expression, not involving a sum of a large number of terms, for the probability that the received message has errors which go undetected.
If a particular shipment of thousands of components actually has a 6 percent rate of defects, what is the probability that this whole shipment will be accepted?
1) According to Luther, what role should the Bibel play in a Christian's life? In his view, how does the Roman Catholic Church obscure the bIble's meaning and message?
How large should the sample size be if she wishes to be accurate within $0.10. A previous study showed that the standard deviation of the price was $.12.
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