Mathematics, 14.11.2019 03:31, breebree6929
Anew concrete mix is being designed to provide adequate compressive strength for concrete blocks. the specification for a particular application calls for the blocks to have a mean compressive strength μ greater than 1350 kpa. a sample of 100 blocks is produced and tested. their mean compressive strength is 1358 kpa and their standard deviation is 75 kpa. a test is made of h0 : µ ≤ 1350 versus h1 : µ > 1350.] a) do you believe it is plausible that the blocks do not meet the specification, or are you convinced that they do? explain your reasoning by carrying out the appropriate hypothesis test.
b) if a sample of 10 blocks is produced and tested with their mean compressive strength at 1372 kpa and their standard deviation at 68 kpa. find the p-value based on the same hypothesis.
Answers: 3
Mathematics, 21.06.2019 17:30, babygirl226
Select the correct answer from the drop-down menu. subtracting 3xy^2 from 8xy^2 gives the same result as the expression. [tex]3xy ^{2} - 8xy ^{2} [/tex][tex] { - 7xy}^{2} - {2xy}^{2} [/tex][tex] {7xy}^{2} - {2xy}^{2} [/tex]
Answers: 3
Mathematics, 21.06.2019 17:30, uticabadgirl
Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny
Answers: 1
Mathematics, 21.06.2019 22:00, nshuey0930
Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4
Answers: 2
Anew concrete mix is being designed to provide adequate compressive strength for concrete blocks. th...