7. Transformations. In some data sets, a transformation by some mathematical functionapplied to the original data, such as √y or logy, can result in data that are simpler towork with statistically than the original data. To illustrate the effect of a transformation,consider the following data, which represent cycles to failure for a yarn product:675365017511502902000100375Transform the data in 2 significant figures by taking the common logarithms of the eightvalues (example: log 675 = 2.8). Calculate the standard deviation of these transformed data.Express your answer in 2 significant digits.

The given data which represent cycles to failure far a yarn product: 675 3650 175 1150 290 2000…

Answered: 7. Transformations. In some data sets,…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 2CYU

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A food bank investigates if the number of times their donors walk by a homeless person each week impacts donors’ charitable contribution to the food bank. The data are presented below in standard form. # of homeless people seen each week Donation to food bank Donor ZX ZY 1 -1.3 0.36 2 0.64 -0.09 3 -1.1 1.26 4 -0.14 0.14 5 1.41 -0.54 6 -0.52 -0.09 7 1.03 -1.9 8 0.64 -0.99 9 0.83 0.36 10 -1.49 1.49 What does ΣZXZY equal? A) 941B) 7.86C) -7.16D) -4.44 What is the correlation (Pearson’s r) between the number of homeless people donors see each week and their donation to the food bank (rounded to 2 decimal places)? A) .98B) -.80C) .72D) -.56 What is the obtained t-value for this r? A) -2.96B) -16.35C) -3.72D) -1.89
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