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The average time a subscriber spends reading the Wall Street Journal is 49 minutes. Assume that the standard deviation is 16 minutes and the time are normally distributed .
i) What is the probability a subscriber will spend at least 1 hour reading the journal ?
ii) What is the probability a subscriber will spend no more than 30 minutes reading the journal ?
Estimate the probability the store will gross over $850 a) Fewer than 5 out of 10 business days.
Assume the arrival of these emails i3 approximated by the Poisson distribution.
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If probability of drawing a face card is 0.625. Determine the probability of not drawing a face card.
In a simple linear regression analysis of 18 data points the following ANOVA table was found.
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Does the normal distribution yield a good approximation of the actual results?
To sketch the 3-sigma X-bar chart and R-chart parameters. A candy bar manufacturer desires to set up a variables control chart for the net weight of its candy bars.
The state highway department is studying traffic patterns on one of the busiest highways in the state. As part of the study, the department needs to estimate the average number of vehicles that pass an intersection each day. A random sample of 64 ..
Can one conclude at a level of significance of .01 that the new ball has improved his game?
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