Based on a sample of a different type of 100 metallic rods, the p-value of the...
Based on a sample of a different type of 100 metallic rods, the p-value of the following two hypothesis tests on mean rod weight was 0.1 each: H 0 : μ = 8.2 , H 1 : μ ≠ 8.2 , and H 0 : μ = 10.4 , H 1 : μ ≠ 10.4 . For this sample, what percent confidence interval on the population mean weight is formed by the interval [8.2, 10.4]? write down the process.
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Based on a sample of a different type of 100 metallic rods, the
p-value of the...
Hypothesis Testing_03 (two independent samples) The diameter of steel rods manufactured on two different extrusio s...
Hypothesis Testing_03 (two independent samples) The diameter of steel rods manufactured on two different extrusio steel rods manufactured on two different extrusion machines is being investigated. Two random samples of sizes , 15 and 17 are selected and the sample means and sample variances are sf = 0.35, 12 = 8.68, and s} = 0.40, respectively. e sample means and sample variances are *; -8.73 d. Write down null and alternative hypotheses to test if the machines produce rods with...
3. A machine produces metal rods used in an automobile suspension system. A random sample of...
3. A machine produces metal rods used in an automobile suspension system. A random sample of 12 rods is selected and the diameter is measured. The resulting data in mm, are shown here: 8.23 8.29 8.19 8.14 8.31 8.19 8.29 8.32 8.42 8.24 8.30 8.40 Find a two-sided 95% confidence interval for the mean rod diameter. State the assumption necessary to find the confidence interval. (5 marks) Is there any evidence to indicate that mean rod diameter exceeds 8.20 mm...
Question 1 (a) In a metal fabrication process, metal rods are produced that have an average...
Question 1 (a) In a metal fabrication process, metal rods are produced that have an average length of 20.5 feet with a standard deviation of 2.3 feet. A quality control specialist collects a random sample of 30 rods and measures their lengths. (i) Describe the sampling distribution for the sample mean by naming the model and telling its mean and standard deviation. [3 marks] (ii) Calculate the probability that the sample mean length of metal rods is less than 19.5...
A steel factory produces iron rods that are supposed to be 36 inches long. The machine...
A steel factory produces iron rods that are supposed to be 36 inches long. The machine that makes these rods does not produce each rod exactly 36 inches long. The lengths of these rods vary slightly. It is known that when the machine is working properly, the mean length of the rods is 36 inches. According to design, the standard deviation of the lengths of all rods produced on this machine is always equal to .05 inches. The quality control...
the most short time answered please 6.3.7 A manufacturer wants to assess whether or not rods...
the most short time answered please
6.3.7 A manufacturer wants to assess whether or not rods are being constructed appro- priately, where the diameter of the rods is supposed to be 1.0 cm and the variation in the diameters is known to be distributed Nu, 0.1). The manufacturer is willing to tolerate a deviation of the population mean from this value of no more than 0.1 cm, i.e., if the population mean is within the interval 1.0 +0.1 cm, then...
A steel factory produces iron rods that are supposed to be 36 inches long. The machine that makes...
A steel factory produces iron rods that are supposed to be 36 inches long. The machine that makes these rods does not produce each rod exactly 36 inches long. The lengths of these rods vary slightly. It is known that when the machine is working properly, the mean length of the rods is 36 inches. According to design, the standard deviation of the lengths of all rods produced on this machine is always equal to .05 inches. The quality control...
14. Molybdenum rods are produced by a production line setup. It is desir- able to check...
14. Molybdenum rods are produced by a production line setup. It is desir- able to check whether the process is in control. Let, X = length of such a rod. Assume X is approximately normally distributed with mean = and variance variance = 0, where the mean and variance are unknown. Take n = 400 sample rods, with sample average length x = 2 inches, and 2(x - )' = 399 In testing H, u = 2.2, H: # 2.2...
In a sample of credit card holders the mean monthly value of credit card purchases was...
In a sample of credit card holders the mean monthly value of credit card purchases was $ 400 and the sample variance was 67 ($ squared). Assume that the population distribution is normal. Answer the following, rounding your answers to two decimal places where appropriate. (a) Suppose the sample results were obtained from a random sample of 12 credit card holders. Find a 95% confidence interval for the mean monthly value of credit card purchases of all card holders. ( , )...
1.) Use the given information to find the P-value. Also, use a 0.05 significance level and...
1.) Use the given information to find the P-value. Also, use a 0.05 significance level and state the conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis). The test statistic in a two-tailed test is z = 1.95. Group of answer choices 0.0256; reject the null hypothesis 0.9744; fail to reject the null hypothesis 0.0512; reject the null hypothesis 0.0512; fail to reject the null hypothesis 2.) Use the confidence level and sample...
Can someone explain this 110. The P-value for a significance test for a population mean is...
Can someone explain this
110. The P-value for a significance test for a population mean is 0.022. The hypotheses are Ho: μ-1 versus H: μ # . Answer each of the following questions with yes, no, or can't tell A) Will a 90% confidence interval for μ include the value l? B) c) will a 99% confidence interval for μ include the value l? D) Will a 95% confidence interval for μ include the value 0? Will a 95% confidence...
Hypothesis Testing_03 (two independent samples) The diameter of steel rods manufactured on two different extrusio steel rods manufactured on two different extrusion machines is being investigated. Two random samples of sizes , 15 and 17 are selected and the sample means and sample variances are sf = 0.35, 12 = 8.68, and s} = 0.40, respectively. e sample means and sample variances are *; -8.73 d. Write down null and alternative hypotheses to test if the machines produce rods with...
3. A machine produces metal rods used in an automobile suspension system. A random sample of 12 rods is selected and the diameter is measured. The resulting data in mm, are shown here: 8.23 8.29 8.19 8.14 8.31 8.19 8.29 8.32 8.42 8.24 8.30 8.40 Find a two-sided 95% confidence interval for the mean rod diameter. State the assumption necessary to find the confidence interval. (5 marks) Is there any evidence to indicate that mean rod diameter exceeds 8.20 mm...
the most short time answered please
6.3.7 A manufacturer wants to assess whether or not rods are being constructed appro- priately, where the diameter of the rods is supposed to be 1.0 cm and the variation in the diameters is known to be distributed Nu, 0.1). The manufacturer is willing to tolerate a deviation of the population mean from this value of no more than 0.1 cm, i.e., if the population mean is within the interval 1.0 +0.1 cm, then...
14. Molybdenum rods are produced by a production line setup. It is desir- able to check whether the process is in control. Let, X = length of such a rod. Assume X is approximately normally distributed with mean = and variance variance = 0, where the mean and variance are unknown. Take n = 400 sample rods, with sample average length x = 2 inches, and 2(x - )' = 399 In testing H, u = 2.2, H: # 2.2...
Can someone explain this
110. The P-value for a significance test for a population mean is 0.022. The hypotheses are Ho: μ-1 versus H: μ # . Answer each of the following questions with yes, no, or can't tell A) Will a 90% confidence interval for μ include the value l? B) c) will a 99% confidence interval for μ include the value l? D) Will a 95% confidence interval for μ include the value 0? Will a 95% confidence...
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