A structural frame is to be fastened in a wallusing rivets inserted into a hole. 15 parts wereselected, and hole diameters were taken.Sample standard deviation was found to be0.008 mm. If the standard deviation exceeds0.01 mm, there is a high probability that therivet will not fit, and the structural frame willfail. At 0.01 level of significance, what will beyour conclusion?The test statistic is 8.96, thusstandard deviation of hole diameterdoes not exceed 0.01 mm.The test statistic is 8.96, thusstandard deviation of hole diameterexceeds 0.01 mm.The test statistic is 11.2, thusstandard deviation of hole diameterexceeds 0.01 mm.none of theseThe test statistic is 11.2, thusstandard deviation of hole diameterdoes not exceed 0.01 mm.

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Answered: A structural frame is to be fastened in…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A recent study done on college students found that the mean time they spend on homework assignments per week is 6.5 hours with a standard deviation of 1.2 hours. Suppose a random sample of 50 college students is taken. Describe the sampling distribution of the sample mean. O shape: exactly normal Hz = 6.5 oz = 1.2 O shape: exactly normal HE= 6.5 oz =0.17 O shape: approximately normal H2 = 6.5 Oz = 0.17 O shape: approximately normal Hz = 6.5 0z = 1.2
Assuming the population has an approximate normal distribution, if a sample size n=16 has a sample mean x¯=31 with a sample standard deviation s=5, find the margin of error at a 98% confidence level. Round the answer to two decimal places.
2- Pooled estimate of the standard deviation = 21.4, and n1 = n2 = 13. Thus, the standardized error is: Select one: 3.45 0.6 6.083 8.393 Clear my choice
A process manufactures ball bearings with diameters that are normally distributed with mean 25.12 mm and standard deviation 0.08 mm. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. What proportion of the diameters are less than 25.0 mm? The proportion is _____ .
A hand consists of 44 cards from a well-shuffled deck of 52 cards. a. Find the total number of possible 44-card poker hands. b. A blackblack flush is a 44-card hand consisting of all blackblack cards. Find the number of possible blackblack flushes. c. Find the probability of being dealt a blackblack flush.
An operations specialist has measured the standard deviation of all parts for a process to be 0.002921374. The sample size is five parts. What is the estimated standard deviation for the X̄-chart? a. 0.000292137 b. 0.000584275 c. 0.000923820 d. 0.001306478 Note:- Do not provide handwritten solution. Maintain accuracy and quality in your answer. Take care of plagiarism. Answer completely. You will get up vote for sure.
The population standard deviation for the heights of dogs, in inches, in a city is 6.2 inches. If we want to be 95% confident that the sample mean is within 2 inches of the true population mean, what is the minimum sample size that can be taken? z0.10 z0.05 z0.04 z0.025 z0.01 z0.005 1.282 1.645 1.751 1.960 2.326 2.576 Use the table above for the z-score, and be sure to round up to the nearest integer.
Many scientists are concerned about changes in the ice thickness due to global warming. Suppose the historical mean thickness of the ice just off the coast of Barrow, Alaska, is 3.32 meters. A recent random sample (n = 28) of the ice thickness near Barrow was obtained. The sample mean ice thickness is 4.036 meters, sample standard deviation s = 2.8 meters. Assume the underlying distribution is normal. Conduct a hypothesis test to determine whether there is any change in the mean ice thickness. Use a = 0.01. Solve by both P-value method and reject region method.
The Weather Underground reported that the mean amount of summer rainfall for the northeastern US is at least 11.52 inches. Ten cities in the northeast are randomly selected and the mean rainfall amount is calculated to be 7.73 inches with a standard deviation of 1.3 inches. At the ? = 0.05 level, can it be concluded that the mean rainfall was below the reported average? Assume the amount of summer rainfall follows a normal distribution. a)State alpha. (Enter an exact number as an integer, fraction, or decimal.)
A sample of size 26 is selected from a normally distributed population. The sample standard deviation is 9.300. What is the standard error of the distribution of sample means? Enter your answer with 3 decimal places.
The population standard deviation for the heights of dogs, in inches, in a city is 6.2 inches. If we want to be 92% confident that the sample mean is within 2 inches of the true population mean, what is the minimum sample size that can be taken? z0.10 z0.05 z0.04 z0.025 z0.01 z0.005 1.282 1.645 1.751 1.960 2.326 2.576 Use the table above for the z-score, and be sure to round up to the nearest integer.
Do a hypothesis for the following, make sure to include and label all five steps: Test the claim that the weights of quarters manufactured with a new machine have a standard deviation less than .058 g. If a sample of 25 has a sample standard deviation of .049 g. Use a significance level of 0.05.

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