Mathematics, 09.07.2020 02:01 potatochin21
Tensile strength tests were carried out on two different grades of wire rod, resulting in the accompanying data.
Grade Sample Sample Sample
Size Mean SD
(kg/mm2)
AISI 1064 m = 126 x = 102.8 s1 = 1.2
AISI 1078 n = 126 y = 121.3 s2 = 2.0
(a) Does the data provide compelling evidence for concluding that true average strength for the 1078 grade exceeds that for the 1064 grade by more than 10 kg/mm2? Test the appropriate hypotheses using the P-value approach. (Use H0: μ1064 − μ1078 = −10 versus Ha: μ1064 − μ1078 < −10. Round your test statistic to two decimal places and your P-value to four decimal places.)
z =
P-value =
State the conclusion in the problem context.
Fail to reject H0. The data does not suggest that the true average strength for the 1078 grade exceeds that for the 1064 grade by more than 10 kg/mm2.
Reject H0. The data does not suggest that the true average strength for the 1078 grade exceeds that for the 1064 grade by more than 10 kg/mm2.
Fail to reject H0. The data suggests that the true average strength for the 1078 grade exceeds that for the 1064 grade by more than 10 kg/mm2.
Reject H0. The data suggests that the true average strength for the 1078 grade exceeds that for the 1064 grade by more than 10 kg/mm2.Your answer is correct.
(b) Estimate the difference between true average strengths for the two grades in a way that provides information about precision and reliability. (Use a 95% confidence interval. Round your answers to two decimal places.)
kg/mm2
Answers: 3
Mathematics, 21.06.2019 15:00
If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?
Answers: 1
Mathematics, 21.06.2019 15:10
The amount of energy it takes to lift a box might be a function of which of the following
Answers: 1
Mathematics, 21.06.2019 21:00
Which expressions are equivalent to -7+3(-4e-3)? choose all answers that apply: choose all answers that apply: a -4(3e+4)? 4(3e+4) b 12e12e c none of the above
Answers: 2
Mathematics, 22.06.2019 01:30
Will mark brainliest! ( explain the answer too, it can be one sentence)
Answers: 1
Tensile strength tests were carried out on two different grades of wire rod, resulting in the accomp...
Biology, 14.07.2019 18:30
Physics, 14.07.2019 18:30
Mathematics, 14.07.2019 18:30
Mathematics, 14.07.2019 18:30
English, 14.07.2019 18:30
Physics, 14.07.2019 18:30
Geography, 14.07.2019 18:30
Mathematics, 14.07.2019 18:30
Geography, 14.07.2019 18:30
English, 14.07.2019 18:30
History, 14.07.2019 18:30
Mathematics, 14.07.2019 18:30