A manufacturer makes ball bearings that are supposed to weigh 30 g. A retailer suspects the...
A manufacturer makes ball bearings that are supposed to weigh 30 g. A retailer suspects the mean weight is less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.4 g with a standard deviation of 4.2 g. At the 0.05 significance level, test the claim that the mean weight of all the ball bearings is less than 30 g. Assume population is normally distributed. Choose an answer for each question. (20 points total) The alternative hypothesis is: A) Nj < 28.4 B) Nj 30.0 C)Nj < 30.0 D)Nj 30.0 The type of test is: A) left-tail B) right-tail C) two-tail The test statistic for this hypothesis test is: A) -1.753 B) -1.524 C) -1.625 D) -1.601 The critical value for the rejection region is: A) -1.645 B) -1.697 C) -1.625 D) -1.753 The conclusion is: A) Reject H0 B) Fail to reject H0
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A manufacturer makes ball bearings that are supposed to weigh 30
g. A retailer suspects the...
Assume that a simple random sample has been selected from a normally distributed population and test...
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select three correct choices. A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 29.2 g with a standard deviation...
Please answer this question FULLY. There are THREE correct answers. Please answer in the form of...
Please answer this question FULLY. There are THREE correct
answers. Please answer in the form of A, B, C
Please do not answer if you don't plan to answer fully.
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select three correct choices. A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A...
A manufacturer of detergent claims that the contents of boxes sold weigh on average at least...
A manufacturer of detergent claims that the contents of boxes sold weigh on average at least 30 ounces. The distribution of weights is known to be normal with standard deviation 0.7. A random sample of 25 boxes yielded an average weight of 29.7 ounces. Suppose an inspector wants to test the null hypothesis that the population mean weight is at least 30 ounces. That is, test the null hypothesis Họ : 4 = 30 against the alternative hypothesis He: u...
Assume that a simple random sample has been selected from a normally distributed population and test...
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select three correct choices. A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 29.2 g with a standard deviation...
The true average diameter of ball bearings of a certain type is supposed to be 0.5...
The true average diameter of ball bearings of a certain type is supposed to be 0.5 in. A one-sample t test will be carried out to see whether this is the case. What conclusion is appropriate in each of the following situations? (a) n = 16, t = 1.59, α = 0.05 Reject the null hypothesis. There is sufficient evidence that the true diameter differs from 0.5 in. Reject the null hypothesis. There is not sufficient evidence that the true...
The diameters of ball bearings made by a machine follow a normal distribution. Ball bearings that...
The diameters of ball bearings made by a machine follow a normal distribution. Ball bearings that are too large or too small are undesirable since they will not work properly. The manager wants to see if the machine is producing ball bearings that are significantly different from .35 inches. To make sure the machine is working properly, we take a random sample of 25 ball bearings and find that the sample mean diameter is .34 inches. Assume the population standard...
The true average diameter of ball bearings of a certain type is supposed to be 0.5...
The true average diameter of ball bearings of a certain type is supposed to be 0.5 in. A one-sample t test will be carried out to see whether this is the case. What conclusion is appropriate in each of the following situations? (a) n 15 t 1.66 a 0.05 o Reject the null hypothesis. There is sufficient evidence that the true diameter differs from 0.5 in o Reject the null hypothesis. There is not sufficient evidence that the true diameter...
S The true average diameter of ball bearings of a certain type is supposed to be...
S The true average diameter of ball bearings of a certain type is supposed to be 0.5 in. A one-sample t test will be carried out to see whether this is the case. What conclusion is appropriate in each of the following situations? (a) n =20,t = 1.59, a = 0.05 Reject the null hypothesis. There is sufficient evidence that the true diameter differs from 0.5 in O Reject the null hypothesis. There is not sufficient evidence that the true...
The mean time that all voters spent at polling booths in Small City is 60 seconds....
The mean time that all voters spent at polling booths in Small City is 60 seconds. A student suspects that the mean time that voters spent at a high school polling booth is less than 60 seconds. She selected a random sample of 30 voters and recorded the times they spent at the polling booth. The sample mean is 54 seconds and the sample standard deviation is 24 seconds. At the 0.05significance level, do the data show sufficient evidence that...
Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You...
Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You think it may be less To test your hypothesis, you develop hypotheses, Hop=20 versus Hy <20, and record the weights of a simple random sample of 17 pugs. Assume the population of pug weights is known to be normally distributed Answer parts (a)(c) Click here to view the 1-Distribution Area in Right Tail. (a) If your mean sample weight is 18.4 pounds with a...
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select three correct choices. A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 29.2 g with a standard deviation...
Please answer this question FULLY. There are THREE correct
answers. Please answer in the form of A, B, C
Please do not answer if you don't plan to answer fully.
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select three correct choices. A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A...
A manufacturer of detergent claims that the contents of boxes sold weigh on average at least 30 ounces. The distribution of weights is known to be normal with standard deviation 0.7. A random sample of 25 boxes yielded an average weight of 29.7 ounces. Suppose an inspector wants to test the null hypothesis that the population mean weight is at least 30 ounces. That is, test the null hypothesis Họ : 4 = 30 against the alternative hypothesis He: u...
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. State the final conclusion that addresses the original claim and select three correct choices. A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 29.2 g with a standard deviation...
The diameters of ball bearings made by a machine follow a normal distribution. Ball bearings that are too large or too small are undesirable since they will not work properly. The manager wants to see if the machine is producing ball bearings that are significantly different from .35 inches. To make sure the machine is working properly, we take a random sample of 25 ball bearings and find that the sample mean diameter is .34 inches. Assume the population standard...
The true average diameter of ball bearings of a certain type is supposed to be 0.5 in. A one-sample t test will be carried out to see whether this is the case. What conclusion is appropriate in each of the following situations? (a) n 15 t 1.66 a 0.05 o Reject the null hypothesis. There is sufficient evidence that the true diameter differs from 0.5 in o Reject the null hypothesis. There is not sufficient evidence that the true diameter...
S The true average diameter of ball bearings of a certain type is supposed to be 0.5 in. A one-sample t test will be carried out to see whether this is the case. What conclusion is appropriate in each of the following situations? (a) n =20,t = 1.59, a = 0.05 Reject the null hypothesis. There is sufficient evidence that the true diameter differs from 0.5 in O Reject the null hypothesis. There is not sufficient evidence that the true...
Instructor-created question Question Help The local veterinarian claims pugs weigh about 20 lbs on average. You think it may be less To test your hypothesis, you develop hypotheses, Hop=20 versus Hy <20, and record the weights of a simple random sample of 17 pugs. Assume the population of pug weights is known to be normally distributed Answer parts (a)(c) Click here to view the 1-Distribution Area in Right Tail. (a) If your mean sample weight is 18.4 pounds with a...
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