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Question: The diameter of Ping-Pong balls manufactured at a large factory is approximately normally distributed, with a mean of 1.30 inches and a standard deviation of 0.04 inch. If you select a random sample of 16 Ping-Pong balls,
a. what is the sampling distribution of the mean?
b. what is the probability that the sample mean is less than 1.28 inches?
c. what is the probability that the sample mean is between 1.31 and 1.33 inches?
d. The probability is 60% that the sample mean will be between what two values, symmetrically distributed around the population mean?
Assuming a normal distribution construct a 95% confidence interval estimate for the mean value of all greeting cards in the store's inventory. Suppose there are 2,500 greeting cards in the store's inventory. How are the results in (a) useful in as..
However because of the high cost of fuel, the owner has recently converted his taxis to operate on a more efficient type of gassoline. He measures and recorded and recorded the millage into (mile/gallons) for 15 taxis
a set of sample scores from an experiment has an n 30 and an xobt 19.a. can we reject the null hypothesis that the
Stock 2 closing price over last month has the mean of 59.2 and the standard deviation of 3.3. Determine which has higher coefficient of variation?
When the x's are equally spaced, the calculation of and can be simplified by coding the x's by assigning them the values ... , -3, -2, -1, 0, 1, 2, 3, ... when n is odd, or the values ... , -5, -3, -1, 1, 3, 5, ... when n is even. Show that with..
How many variables are there in this study? What are the levels of any variable you identified?- What hypothesis test would be used to analyze these data? Justify your answer.
Compute the mean and median.Compute the variance, standard deviation, range, and co-efficient of variation.Are the data skewed? If so, how?
In a compressed data file of 10,000 bytes, each byte is equally likely to be any one of 256 possible characters b0,..., b255 independent of any other byte. If Ni is the number of times bi appears in the file, find the joint PMF of N0,..., N255. Also,..
A researcher wants to determine a 95% confidence interval for the mean number of hours that UMKC students spend doing homework per week.
If Kate starts on the paving stone outside her house and hops onto every second stone, she will get to the second to last stone before the house of her friend Sam.
Scores range from 0 to 200. The mean score for students who live on the west coast is about 115. Construct a 90% confidence interval for the unknown mean of the students on the east coast.
Construct a box plot for the data in given problem. What can you say about the data?- Draw a frequency polygon and an ogive for these data.
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