We want to estimate the number of pounds of ground beef produced during a month. The firm processes 25,000 cows every year in this plant, and samples 500 cows for this investigation. This sample produced i = 290 lbs ground of beef per cow with a sample standard deviation of s= 40 lbs. The plant is paid S.75/lb for the beef. %3D a) Find a 90% confidence interval for ground beef. The plant manager bragged about the productivity of his workers and gave them a bonus because he says they slaughtered 2,500 cows and made $560,000 for the plant this month. Should the board of directors investigate? Why or why not? b)

The score on standardized test are normally distributed with a mean of 115 and standard deviation of 25. What test score is 1 standard deviations above the mean

The IDOLE Company has two assembly lines in its Hamburg plant. Line A produces an average of 335 units per day with a standard deviation equal to 11units. Line B produces an average of 145 units per day with a standard deviation equal to 8 units. Based on this information using the coefficient of variation determine which line is relatively more consistent? Explain the answer by the information given and through the calculations involved in arriving at the answer.

Internet speeds are a heavily advertised selling point of Internet Service Providers. You notice that although you are paying for a certain speed, the true speed seems to vary depending on where you are in your house. In order to estimate the true average speed you are getting in your house, you go to 13 random spots around your house and record the speed (in MBs per second) shown from a test at 'www.speedtest.net'. You see that the average is 5.61 MB/s with a standard deviation of 1.274 MB/s. You decide to create a 99% confidence interval for the average internet speed in your house. What is the margin of error for this estimate?

The scores on a​ driver's test are normally distributed with a mean of 100.   Find the score that is 3 standard deviations above the​ mean, if the standard deviation is 30.

The mean of a distribution is 15 and the standard deviation is 3. Use Chebyshev's Theorem and the formula 1 - 1 / (k ^ 2) to determine the minimum percentage of values that will fall between 9 and 21

how to calculate standard deviation

Assume that scores on a bone mineral desity test are normally distributed with a mean of 0 and a standard deviation of 1.    b. what do the symbols mean^2 and standard deviation ^2 represent.

How is dfwithin and dftotal calculated in statistics? Please write out words for formulas.

How can i compute the standard deviation?