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An experiment measuring the percent shrinkage on drying of 50 clay specimens produced the following data:
18.2
21.2
23.1
18.5
15.6
20.8
19.4
15.4
13.4
16.4
18.7
19.6
14.3
16.6
24.0
17.6
17.8
20.2
17.4
23.6
17.5
20.3
19.3
13.9
20.5
19.0
22.3
18.4
20.4
21.4
20.1
20.6
14.8
19.7
18.0
15.8
17.0
(a) Draw a stem and leaf plot of these data.
(b) Compute the sample mean, median, and mode.
(c) Compute the sample variance.
(d) Group the data into class intervals of size 1 percent starting with the value 13.0, and draw the resulting histogram.
(e) For the grouped data acting as if each of the data points in an interval was actually located at the midpoint of that interval, compute the sample mean and sample variance and compare this with the results obtained in parts (b) and (c). Why do they differ?
Create an APA style table that presents descriptive statistics for variables
1.colleges conduct student evaluations of instruction to determine if there are patterns of either excellence or the
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most major airlines allow passengers to carry two pieces of luggage of a certain maximum size onto the plane. however
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Past experience at the Crowder Travel Agency indicated that 44% of those persons who wanted the agency to plan a vacation for them wanted to go to Europe.
an automatic welding machine is being considered for production. it will be considered for purchase if it is successful
Calculate the value of Pearson correlation. Illustrate what information is provided by the numerical value of the Pearson correlation.
Is contamination with the two kinds of bacteria disjoint? Explain. (c) Is contamination with the two kinds of bacteria independent? Explain.
The quality-control department took a random sample of 50 cans and found that the arithmetic mean weight was 16.05 ounces? Determine the p-value.
In each of the following situations, the sampling frame does not match the population, resulting in undercoverage. Give examples of population members that might have been omitted:
What does this data tell us by itself before we do anything with it such as doing hypothesis testing or comparing it to other data? How can this be used by the M&M company?
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