A soccer ball manufacturer claims the diameters of their ball have a standard deviation of 2 mm when properly inflated. Based on a random sample of 10 balls you find a standard deviation of 3.2 mm. Does the sample suggest the standard deviation is higher than that claimed by the manufacturer?
What are the necessary steps to solve this problem?
A soccer ball manufacturer claims the diameters of their ball have a standard deviation of 2...
a Soccer ball manufacturer claims the diameters of their ball have a standard deviation of 2 mm when properly inflated. Based on a random sample of 10 balls you find a standard deviation of 3.2 mm. DOES the sample suggest the standard deviation is higher than that claimed by the manufacturer?
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.13 inch. (a) Determine the minimum sample size required to construct a 99%confidence interval for the population mean. Assume the population standard deviation is 0.6 inch. (b) The sample mean is 28.2 inches. With a sample size of 152, a 99% level of confidence, and a population standard deviation of 0.60 inch, does it seem possible that the population mean could be less than 28.3 inches?...
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.190.19 inch. (a) Determine the minimum sample size required to construct a 9999% confidence interval for the population mean. Assume the population standard deviation is 0.60.6 inch. (b) The sample mean is 2828 inches. With a sample size of 7676, a 9999% level of confidence, and a population standard deviation of 0.60.6 inch, does it seem possible that the population mean could be less than 28.128.1...
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.13 inch (a) Determine the minimum sample size required to construct a 99% confidence interval for the population mean. Assume the population standard deviation is 0.7 inch. (b) The sample mean is 28.3 inches. With a sample size of 202, a e8% level of confidence, and a population standard deviation of 0.7 inch. does it seem possible that the population mean could be less than 28.4...
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.12 inch. (a) Determine the minimum sample size required to construct a 99% confidence interval for the population mean. Assume the population standard deviation is 0.5 inch. (b) The sample mean is 27 inches. With a sample size of 124, a 99% level of confidence, and a population standard deviation of 0.5 inch, does it seem possible that the population mean could be less than 27.1...
Question Help A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.19 inch. (a) Determine the minimum sample size required to construct a 99% confidence interval for the population mean. Assume the population standard deviation is 0.6 inch (b) The sample mean is 25.9 inches. With a sample size of 75, a 99% level of confidence, and a population standard deviation of 0.6 inch, does it seem possible that the population mean could be less...
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.17 inch (a) Determine the minimum sample size required to construct a 99% confidence interval for the population mean. Assume the population standard deviation is 07 inch (b) The sample mean is 27.9 inches. With a sample size of 121, a 99% level of confidence, and a population standard deviation of 0.7 inch, does it seem possible that the population mean could be less than 28...
A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in (a) Determine the minimum sample size required to construct a 99% confidence interval for the population mean Assume the population standard deviation is 0 25 in. (b) Repeat part (a) using a population standard deviation of 0.30 in. Which standard deviation requires a larger sample size? Explain 25 a) The minimum sample size required to construct a 99% confidence inte valus (Round up to...
A golf balls manufacturer requires that the weights of its golf balls have a standard deviation that is less or equal 0.08 ounces. One of the quality control inspectors says that the machines need to be recalibrated because he believes (claims) the standard deviation of the weighs of the golf balls is more than 0.08 ounces. To test the machines, he selects a random sample of 50 golf balls off the assembly line and finds that they have a mean...
A manufacturing process ball bearings with diameters that have a normal distribution with known population standard deviation of .03 centimeters. Ball bearings with diameters that are too small or too large are undesirable. In order to test the claim that μ = 0.50 centimeters, perform a two-tailed hypotheses test at the 5% level of significance. A random sample of 49 gave a mean of 0.48 centimeters. Perform a hypotheses test and state your decision.