Researchers are testing the breaking strength of a new brand of rope using a large sample of ropes. In a test of Ho: P = 0.80 versus Ha: P > 0.80, where p is the true proportion of all ropes of this brand that would break when subjected to a weight of 1000 pounds, the test statistic is z = 1.45. Is Ho rejected and if so is it at the 10 percent or 5 percent level of significance. If not rejected what level of significance is it at if any?
Researchers are testing the breaking strength of a new brand of rope using a large sample...
A new type of rope has a mean breaking strength of 15 kilograms with a standard deviation of 0.5 kilogram. To test the hypothesis, a random sample of 50 lines are tested and the average breaking strength is found to be 14.8 kilograms. (a) Test the hypothesis, at the 0.01 level of significane the the mean is that u = 15 kilograms against the alternative that u < 15 kilograms. (b) Evaluate the P value of the test.
A new type of rope has a mean breaking strength of 15 kilograms with a standard deviation of 0.5 kilogram. To test the hypothesis, a random sample of 50 lines are tested and the average breaking strength is found to be 14.8 kilograms. (a) Test the hypothesis, at the 0.01 level of significane the the mean is that μ = 15 kilograms against the alternative that μ < 15 kilograms. (b) Evaluate the P value of the test.
QUESTION A new type of rope has a mean breaking strength of 10 kilograms with a standard deviation of 1 kilogram. To test the hypothesis, a random sample of 20 lines are tested and the average breaking strength is found to be 8.5 kilograms. (a) Test the hypothesis, at the 0.01 level of significane the the mean is that - 10 kilograms against the alternative that p < 10 kilograms. (b) Evaluate the P value of the test. т т...
QUESTION 4 A new type of rope has a mean breaking strength of 25 kilograms with a standard deviation of 3 kilogram. To test the hypothesis, a random sample of 50 lines are tested and the average breaking strength is found to be 22 kilograms. (a) Test the hypothesis, at the 0.05 level of significane the the mean is that u = 25 kilograms against the alternative that u < 25 kilograms. (b) Evaluate the P value of the test.
ment "The breaking strength of Brand A cotton threads is larger than the Brand B" is true. These students randomly selected 10 Brand A cotton threads and 10 Brand B cotton threads. Assume that population distributions for both Brands A and B are approximately independent normal. The breaking strength of each brand is indicated in following table. The data and relevant R commands and outputs are given below. Answer the following questions from 1 though 5. Brand A 208.5, 187.6,...
Sozcüklero volp SORU 4 A new type of rope has a mean breaking strength of 10 kilograms with a standard deviation of 1 kilogram. To test the hypothesis, a random sample of 20 lines are tested and the average breaking strength is found to be 8.5 kilograms. (a) Test the hypothesis, at the 0.01 level of significane the the mean is that = 10 kilograms against the alternative that p < 10 kilograms. (b) Evaluate the value of the test....
In testing H0: µ = 100 versus Ha: µ ╪ 100 versus using a sample size of 325, the value of the test statistic was found to be 2.16. The p-value (observed level of significance) is best approximated by 0.0154 0.9692 0.4846 0.0308 0.007
1. Gibbs Baby Food Company is comparing the weight gain of infants using its brand versus its competitor’s brand. A sample of 20 babies using the Gibbs products revealed a mean weight gain of 7.6 pounds in the first three months after birth. For the Gibbs brand, the sample standard deviation is 2.3 pounds. A sample of 28 babies using the competitor’s brand revealed a mean increase in weight of 8.1 pounds. The sample standard deviation is 2.9 pounds. At...
Recent incidents of food contamination have caused great concern among consumers. An article reported that 33 of 80 randomly selected Brand A brand chickens tested positively for either campylobacter or salmonella (or both), the leading bacterial causes of food-borne disease, whereas 69 of 80 Brand B brand chickens tested positive. (a) Does it appear that the true proportion of non-contaminated Brand A chickens differs from that for Brand B? Carry out a test of hypotheses using a significance level 0.01....
Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an unabraded condition and an abraded condition. Test Ho: 4 = 0 versus Ha: u > 0 at significance level 0.01. Fabric 1 2 3 4 5 6 7 8 U 36.4 55.0 51.3 38.8 43.2 48.8 25.6 49.8 A 28.5 20.0 46.0 34.0 36.5 52.5 26.5 46.5 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and...