of 0.179. Does the 0.05 level that the variance of the bolt diameters is more than...
A bolt manufacturer wants to investigate the machine that produces bolts with a diameter of 0.28 centimeters. If the variance of the diameters is equal to 0.025, then the machine is working as expected. A random sample of 11 bolts has a standard deviation of 0.3379. Does the manufacturer have evidence at the α=0.005 Assume the population is normally distributed. step 1: state the null and alternate hypothesis. step 2:determine the critical value of the test statistic. separate 2 tailed...
The target diameter of bolts from a production line is 8mm. Historically the bolt diameters are normally distributed with a standard deviation of 0.05mm. To monitor this process periodically an engineer takes a random sample of 4 measurements. Let µ be the true average bolt diameter. The rejection region is: Find the minimum value of c that yields a test with significance 0.05? zα 1.282 1.645 1.960 2.326 2.576 3.090 α(tail area) 0.1 0.05 0.025 0.01 0.005 0.001 %ile...
A soft-drink dispensing machine is said to be out of order if the variance of the contents exceeds 1.15 deciliters. If a random sample of 25 drinks from this machine has sample variance of 2.03 deciliters, does this indicate at the 0.05 level of significance that the machine is out of order?Assume that the contents are approximately normally distributed.
The target diameter of bolts from a production line is 12mm. Historically the bolt diameters are normally distributed with a standard deviation of 0.1mm. To monitor this process periodically an engineer takes a random sample of 5 measurements. Let µ be the true average bolt diameter. The rejection region is: Find the minimum value of c that yields a test with significance 0.01? zα 1.282 1.645 1.960 2.326 2.576 3.090 α(tail area) 0.1 0.05 0.025 0.01 0.005 0.001 %ile 90...
The target diameter of bolts from a production line is 10mm. Historically the bolt diameters are normally distributed with a standard deviation of 0.15mm. To monitor this process periodically an engineer takes a random sample of 6 measurements. Let µ be the true average bolt diameter. The rejection region is: Find the minimum value of c that yields a test with significance 0.01? zα 1.282 1.645 1.960 2.326 2.576 3.090 α(tail area) 0.1 0.05 0.025 0.01 0.005 0.001 %ile...
The measurements of the diameters (in inches) of 12 randomly chosen golf balls are listed. At α=0.05, is there enough evidence to reject the claim that the standard deviation of the measurements of these diameters is 0.005? Assume the population is normally distributed. 1.677 1.677 1.682 1.683 1.683 1.683 1.681 1.682 1.681 1.681 1.679 1.677 B) Find the critical value C) Find the standardized test statistic for X2 -test
Using ? = 0.05, test if the population variance ?2 is greater than 4.9 if a sample of size 24 yields a sample variance of 6.5.
15. Test the hypothesis that at the at 0.05 level of significance for the given sample data Assume that the populations are normally distributed Chapter 111 Population 1 Population 2 11 11 n 5 2.5 a. Write both alternative and null hypothesis. H: 01-02 Ho: 01-02 Two tail test b. Find test statistics (show formula and final answer with two decimals) F = 5,7/S7 = 2.52/4.62 = 0.30 c. Find P-value (round to 3 decimal places) 0.965 > 0.05. We...
The diameters of ball bearings are distributed normally. The mean diameter is 51 millimeters and the variance is 25. Find the probability that the diameter of a selected bearing is greater than 46 millimeters. Round your answer to four decimal places.
A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 444 gram setting. Is there sufficient evidence at the 0.05 level that the bags are underfilled? Assume the population is normally distributed. State the null and alternative hypotheses for the above scenario. Keypad Answer 2 Points Ho: 0 Ha: A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 444 gram setting. Is there...