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The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. Fifty newborn elephants are weighed. The sample mean is 244 pounds. The sample standard deviation is 11 pounds.
Construct a 95% confidence interval for the population mean weight of newborn elephants. State the confidence interval, sketch the graph, and calculate the error bound.
a pair of fair 6-sided die one green one red are rolled. let x be the number on the green die y be the number on the
according to an irs study it takes a mean time of 330 minutes for taxpayers to prepare copy and electronically transfer
during the 2010 world cup group stage my friend manmood wanted me to pay him 5 if brazil beat portugal. at the time i
Find the mean and standard deviation for the number of times this letter will be found on a typical page of 2900 characters.
Over the same period the average /maximum temperature in Dublin was 6.2 degrees Centigrade. The standard deviation was 2.9. How to compute the variance of temperature in Boston.
A manufacturer of "low precision" 10 mm diameter ball bearings periodically takes samples and measures them to con?rm that the manu- facturing process is still on target. A random sample of 20 ball bearings resulted in diameter measurements with a..
Take the heat transfer coefficients on the inner and outer surfaces of the window to be h1 = 10 W/m2 °C and h2 = 40 W/m2 °C, which includes the effects of radiation.
sampling distributions the following data represent the running lengths in minutes of the winners of the academy award
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
The sample resulted in a mean trading volume of > = 39.48. Assuming a population standard deviation of 15.07, compute the margin of error for a 95% confidence interval for mu.
One box contains five red and six black marbles. A second box contains 10 red and five black marbles. One marble is drawn from box 1 and placed in box 2.
if y is a random variable that has an f distributions with v1 numerator and v2 denominator degrees of freedom show
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