2. Use the z-score table located in section 14.3 of the e-text to help answer the following. a) Suppose that breaking po

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2 Use The Z Score Table Located In Section 14 3 Of The E Text To Help Answer The Following A Suppose That Breaking Po 1 (29.41 KiB) Viewed 38 times

2. Use the z-score table located in section 14.3 of the e-text to help answer the following. a) Suppose that breaking point of a rope (in pounds) is normally distributed, with a mean of 100 pounds and a standard deviation of 16. What percentage of ropes would you expect to break when subjected to a load of between 100 and 116 pounds? b) What percentage of ropes would you expect to break between 100 and 124 pounds? You will need to use the z-score formula here: the formula is z = For this problem, x= 124. 3. You will need to use the critical values of the correlation coefficient, r, table found in section 14.4 of the e-text to answer these problems. a) Is a correlation coefficient of r = 0.867 when n = 16 significant at the 5% level? Why or why not? b) Is a correlation coefficient of r=-0.209 when n = 100 significant at the 1% level? Why or why not?