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Question: Bad carpet The number of flaws per square yard in a type of carpet material varies with mean 1.6 flaws per square yard and standard deviation 1.2 flaws per square yard. The population distribution cannot be Normal, because a count takes only whole-number values. An inspector studies a random sample of 200 square yards of the material, records the number of flaws found in each square yard, and calculates x -, the mean number of flaws per square yard inspected. Find the probability that the mean number of flaws exceeds 1.8 per square yard. Show your work.
consider the height of a person as a random variable. some possible random variables include time a person wakes up in
What method of data collection would you use to collect data for a study where a political pollster wishes to determine if his candidate is leading in the polls?
Fit a linear equation to the scatter diagram. Is the slope positive or is it negative? Is the sign of the slope consis- tent with your intuitive observation in part (a)?
Calculate the mean, median, mode, variance, and standard deviation for both the sample and the population. For the population mean construct the 95% confidence interval
a financial investment increased in value by 33.1 after one year and then its value remained flat no change the next
response time at an online site can be modeled with an exponential distribution with a mean service of 5 minutes. john
An agreement cannot bind unless both parties to the agreement know what they are doing and freely choose to do it. This implies that the seller who intends.
A sample of 3000 observations has a mean of 85 and a standard deviation of 10. The distribution is bell-shaped. Using the empirical rule, find what percentage of the observations fall in the intervals
A cereal manufacturer seeks to test their newest product against a competitor's. A group of 100 children was asked to evaluate each brand, and then to express a preference. To guard against bias, neither the children, nor the technicians serving t..
Do these results support the claim that the mean speed is higher for the population of drivers who do not wear seatbelts than for the population of drivers.
do women tend to marry men of similar intelligence? fifty couples were used to investigate this question. a standard iq
Discussion 1: Many people do not "like" or "trust" single point estimates for things they need measured. How might adding confidence intervals help managers accept the results better? Why?
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