Consider the following samples for the diameter of 18 rivet heads (in 1/100 of an inch) of one kind in a production line, labeled inorder as rivet 1, rivet 2, and so on, as follows (in order): given a standard deviation of 6 and confidence level of 99%.6.726.776.826.706.786.706.626.756.666.666.646.766.736.806.726.766.766.686.686.766.716.726.806.776.756.796.806.76 6.716.816.726.736.746.656.77 6.68a. What is the mean diameter of the rivet head?b. What is the mode of the rivet's head diameter?c. What is the median of the rivets head diameter?d. what is the confidence interval of the rivet head in a normal distribution z-score?e. what is the z-value?f. What is the value of z if there is a total of 120 population of rivet heads?

As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Answered: Consider the following samples for the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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4. Fit a straight line to the following data and compute the standard deviation. 0.5 1 1.5 2.5 3.5 4 4.5 5 y 3.076 2.810 2.588 2.297 1.981 1.912 1.653 1.478 1.399 1.018 0.794
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Consider the following set of data. Sample Size Mean Standard Deviation Group 1 100 13,000 345 Group 2 80 12,850 500 Assume that the samples come from normal populations. Find the value of the test statistic used for testing the hypotheses Ho: 1 - 2 = 0 versus H - As 70. Ot = - 3.02 Ot = - 2.45 Ot = - 2.81 Ot = - 2.28 O None of the above.
The management of a local restaurant wants to estimate the average amount their customers spend at the restaurant to within $0.50, with 95% confidence. What is the minimum sample size required, if the standard deviation is assumed to be $3.50.
The following sample data are from a normal population: 10, 8,12,15, 13, 11, 6, 5 a. What is the point estimate of the population mean? b. What is the point estimate of the population standard deviation (to 3 decimals)? c. with 95% confidence, what is the margin of error for the estimation of the population mean (to 1 decimal)? d. What is the 95% confidence interval for the population mean (to 1 decimal)? ,
The following information was obtained from two independent samples randomly selected from tvo normally distributed population with unknown but equal variances. Mean Standard deviation Sample size Sample 1 15.55 3.26 20 Sample 2 13.97 3.78 21 What is the point estimate of the population variance? OA. 13.144 OB. 12.205 OG.3.527 OD.3.536 web.whatsapp.com - now
A survey of several 9 to 11 year olds recorded the following amounts spent on a trip to the mall: $19.26, $21.87, $15.83, $20.57, $19.31, $24.74, $22.82 Construct the 95% confidence interval for the average amount spent by 9 to 11 year olds on a trip to the mall. Assume the population is approximately normal. Copy Step 2 of 4: Calculate the sample standard deviation for the given sample data. Round your answer to two decimal places.
The monthly earnings of a group of business students are normally distributed with a standard deviation of 478 dollars. A researcher wants to estimate the mean monthly earnings of all business students. Find the sample size needed to have a confidence level of 91% and a margin of error of 125 dollars. O a. 56 O b. 43 O c. 46 O d. 64
a. Determine the sampling distribution of the sample mean for samples of size 3. Interpret your answer in terms of the distribution of all possible sample mean brain weights for samples of three men. The mean of the sample mean is μx=1.401.40kg. (Type an integer or a decimal. Do not round.) The standard deviation of the sample mean is σx=0.06350.063kg. (Round to four decimal places as needed.) Interpret these answers in context. For samples of three men, the individual brain weights have a normal distribution with a mean of 1.41.4 kg and a standard deviation of 0.06350.0635 kg. (Type integers or decimals rounded to four decimal places as needed.)
4. Fit a straight line to the following data and compute the standard deviation. 10 ter 0.5 1.5 2.5 3.076 2.810 2.588 2.297 1.981 1.912 1.653 1.478 1.399 1.018 0.794 3 3.5 4 4.5
What is the standart-deviation of the following data? (select the closest value) Class Frequency 2.7 - 2.9 5 - 3.0 3.2 6. -- 3.3 3.5 12 - 3.6 3.8 9. 3.9 - 4.1 9. - 4.2 4.4 9 - Select one: 1.6922 2.8636 0.5077 none || | | |

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