is a measure of a matenal\'s ability to resist failure in bending. The accompany
ID: 3041924 • Letter: I
Question
is a measure of a matenal's ability to resist failure in bending. The accompanying data are on flexural strength of Flexural strength concrete (in MegaPascal, MPa, where 1 Pa (Pascal)-1.45 x 10-4 psi): 5.7 7.2 7.3 6.3 8.1 6.8 7.0 7.6 6.8 65 .0 63 7.9 .0 8.2 8.7 7.8 9.7 74 7.7 9.7 7.8 7.7 11.6 11.2 11.8 10.8 (a) Construct a stem-and-leaf display of the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values) Stems Leaves 6 33.5.8.8 7 10 o 2 3 4 7 7 88 ): 1x 9 [0.7.7 10 8 11 2.68 What appears to be a representative strength value? MPa Do the observations appear to be highly concentrated about the representative value or rather spread out? highly concentrated around the representative value spread out with a large range (b) Does the display appear to be reasonably symmetric about a representative value, or would you describe its shape in some other way? reasonably symmetric O positive skewness O negative skewness completely random distribution (c) Do there appear to be any outlying strength values? O Yes O No (d) What proportion of strength observations in this sample exceed 10 MPa? (Round your answer to two decimal places.)Explanation / Answer
Solution:-
a)
=> 7.8 MPa
=> option b. spread out with a large range
b) option B. positive skewness
c) option B. No
d) 0.15
stems leafs 5 7 6 3 3 5 8 8 7 0 0 2 3 4 6 7 7 8 8 9 8 1 2 7 9 0 7 7 10 8 11 2 6 8Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.