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# potato3999

Questions

### Top questions (5)

3
##### What are descendants of european planters and african slaves called?
Seen 5 months ago
3
##### Why should chruches in the usa have been so important in the development of a sense of civic duty and civic competance?
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4
##### Express the area of a rectangle with length 2c^3 d^2 and width 9d^7 as a monomial
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3
##### Jim ordered a sports drink and three slices of pizza for \$8.50. his friend ordered two sports drink and two slices of pizza for \$8.00. applying system of equations
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4
##### An experiment was performed to compare the abrasive wear of two different laminated materials. twelve pieces of material 1 were tested by exposing each piece to a machine measuring wear. ten pieces of material 2 were similarly tested. in each case, the depth of wear was observed. the samples of material 1 gave an average (coded) wear of 85 units with a sample standard deviation of 4, while the samples of material 2 gave an average of 81 and a sample standard deviation of 5. assume the populations to be approximately normal with equal variances. a) can we conclude at the 0.05 level of significance that the abrasive wear of material 1 exceeds that of material 2 by more than 2 units? b) repeat part (a) if n1=n2=60.
Seen 5 months ago