Question 1:
(a)
mean | 19.10 |
sample standard deviation | 6.57 |
coefficient of variation (CV) | 34.39% |
Question 2:
(b)
mean | 17.00 |
sample standard deviation | 5.81 |
coefficient of variation (CV) | 34.17% |
(c)
standard error of the mean | 1.94 |
(d) The 90% confidence interval is between 13.40 and 20.60.
confidence interval 90.% lower | 13.40 |
confidence interval 90.% upper | 20.60 |
margin of error | 3.60 |
t(df = 8) | 1.86 |
An engineer performed N= 20 tests to assess the load capacity of a new anchoring device....
Please be as clear as possible.
Textbook - Applied Statistics and Probability for Engineers by
Montgomery, 6th Edition
An engineer performed N= 20 tests to assess the load capacity of a new anchoring device. The measured load capacities are as follows (in kN): 11.0 20.0 24.0 13.0 16.0 24.0 18.0 7.0 20.0 22.0 17.0 18.0 28.0 27.0 20.0 15.0 12.0 11.0 31.0 28.0 After having assessed that the load capacity is normally distributed, the engineer wants to determine some statistics...
please be as clear as possible, take note of units and
significant figures. thanks for the help
An engineer performed N= 20 tests to assess the load capacity of a new anchoring device. The measured load capacities are as follows (in kN): 11.0 20.0 24.0 13.0 16.0 24.0 18.0 7.0 20.0 22.0 17.0 18.0 28.0 27.0 20.0 15.0 12.0 11.0 31.0 28.0 After having assessed that the load capacity is normally distributed, the engineer wants to determine some statistics of...
n article considered various issues associated with determining endotoxin concentration. The following data on concentration (EU/mg) in settled dust for one sample of urban homes and another of arm homes was kindly supplied by the authors of the article. U: 6.0 5.0 11.0 33.0 4.0 5.0 89.0 18.0 35.0 17.0 23.0 F:4.0 14.0 11.0 9.0 9.0 8.0 4.0 20.0 5.0 8.9 21.0 9.2 3.0 2.0 0.3 (a) Determine the value of the sample standard deviation for each sample. [Hint: x...
statistics help
15) Express the alternative hypothesis in symbolic form. A professor dlaims that the mean amount of time (in hours) sophomores spent studying for the statistics final exam is more than that of freshmen. Assume that the two samples are independent. Let the freshmen be the first population and the sophomores be the second 16) Assume that the following confidence interval for the difference in the mean length of male (sample 1) and birth was constructed using independent simple...
please answer all questions and use the formula sheet below
for question 23.
20) statistics students must be t ssume that we want to estimate the mean 10 score for the pogaoe that the sample mean is within statistics shudents. How many 95% confidence that the sample mean ts within andomly selected for 10 tests if we want 2 10 points of the population mean? Note that 10 tests are typicalls standard devintion is 15 error Ey? (a) Decrease ow...
Question 202.5 pts If we consider the simple random sampling process as an experiment, the sample mean is _____. Group of answer choices always zero known in advance a random variable exactly equal to the population mean Flag this Question Question 212.5 pts The basis for using a normal probability distribution to approximate the sampling distribution of x ¯ and p ¯ is called _____. Group of answer choices The Law of Repeated Sampling The Central Limit Theorem Expected Value...
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Please m asking for assistance on statistics
Q10. A population consists of the following N-5 scores: 0, 6, 4, 3, and 12 a. Compute u ando for the population b. Find the 2-score for each score in the population c. Transform the original population into a new population of N = 5 scores with a mean of u = 100 and a standard deviation of a = 20 Q11. For a sample with a mean of M = 51, a...
1) Come up with a single (one) question or problem
2) Think of an example with 30 data points
a. This data needs to be of a quantitative variable
(numbers).
3) Then proceed to follow the below steps.
example of 30 quantitative data points
Purpose
State how, when, and where data was collected
List of raw data pairs
Frequency distribution (table)
Histogram
Relative percentage polygon
Sample mean
Sample median
Sample mode(s)
Sample range
Sample variance
Sample standard deviation
Coefficient of...