Engineering, 18.11.2019 22:31 mari33312
The national health statistics reports dated oct. 22, 2008, included the following information on the heights (in.) for non-hispanic white females: age sample size sample mean std. error mean 20–39 866 64.9 0.09 60 and older 934 63.1 0.11 (a) calculate and interpret a confidence interval at confidence level approximately 95% for the difference between population mean height for the younger women and that for the older women. (b) let µ1 denote the population mean height for those aged 2039 and µ2 denote the population mean height for those aged 60 and older. interpret the hypotheses h0 : µ1 − µ2 = 1 and ha : µ1 − µ2 > 1, and then carry out a test of these hypotheses at significance level 0.05 using the confidence interval in (a).
Answers: 3
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Engineering, 04.07.2019 18:10
Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.
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Engineering, 04.07.2019 18:20
Describe one experiment in which the glass transition temperature and melting temperature of a totally amorphous thermoplastic material can be determined. show the relevant experimental results in a diagram which should be properly annotated with the two temperatures clearly marked. what is likely to happen to the curve in the diagram if the amorphous polymer is replaced by a thermosetting type?
Answers: 2
Engineering, 04.07.2019 19:10
Plan an experiment to measure the surface tension of a liquid similar to water. if necessary, review the ncfmf video surface tension for ideas. which method would be most suitable for use in an undergraduate laboratory? what experimental precision could be expected?
Answers: 2
The national health statistics reports dated oct. 22, 2008, included the following information on th...
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