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Look at a map of your state, or a neighboring state, that has the lakes marked in a visible way. An environmental scientist wants to estimate the average area of the lakes in the state.
She decides to sample lakes by randomly dropping grains of rice on the map and measuring the area of the lakes hit by the rice. Comment on whether or not you think this is a good sampling plan.
Construct and interpret the 95% confidence interval for the population mean. Was it necessary to make any assumptions about the shape of the population distribution? Explain.
a population has a mean of 129. if a random sample of 8 items from the population results in the following sampled
a computer system requires all uses to log on using a 6 character password. if each character can be either a digit
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?
This problem related to Basic Statistics and it discuss about the examples of qualitative and quantitative methods of data collection
Write the hypothesis statement. What distribution are you using?
In a large population of college-educated adults, the mean IQ is 118 with a standard deviation of 20. What is the probability that a randomly selected adult from this population has an IQ that is greater than 120?
One day, you notice your 6' 2" roommate's size 12 shoes and comment, "I think height and foot size are correlated". You're somewhat surprised (and irked) by his response, "I think short people have big mouths."
According to an Internet posting, 80% of adults enjoy drinking beer. If a group of 3 adults is selected at random, find the probability that none of them enjoy drinking beer.
The winning team's scores in 9 high school basketball games were recorded. If the sample mean is 9.8 points and the sample standard deviation is 0.15 points, find the 98% confidence interval of the true mean.
Suppose that during the ith day of December, the energy Xi stored by a solar collector is well modeled by a Gaussian random variable with expected value 32 - i/4 kW-hr and standard deviation of 10 kW-hr.
phone calls arrive at the rate of 48 per hour at the desk for regional airways1 compute t he probability of recieving
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