15. The following ten daily observations on PM2.5 values in Buffalo were observed in January 2018: 9.4, 3.8, 8.0, 4.2, 6.3, 16.7, 9.5, 3.6, 7.5, 3.9. There were nine daily observations in February 2018: 8.8, 4.2, 12.9, 16.4, 11.2, 10.5, 5.2, 3.8, 3.8. Test the null hypothesis that the means for January and February are equal. Use a=0.10. Also give the p-value.

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15. The following ten daily observations on PM2.5 values in Buffalo were observed in
January 2018: 9.4, 3.8, 8.0, 4.2, 6.3, 16.7, 9.5, 3.6, 7.5, 3.9. There were nine daily
observations in February 2018: 8.8, 4.2, 12.9, 16.4, 11.2, 10.5, 5.2, 3.8, 3.8. Test
the null hypothesis that the means for January and February are equal. Use
¹=0.10. Also give the p-value.
16. Find the 90% and 95% confidence intervals for the following mean stream link lengths:
100, 426, 322, 466, 112, 155, 388, 1155, 234, 324, 556, 221, 18, 133, 177, 441.
and 40 in Amherst, finding that
Transcribed Image Text:pobied 15. The following ten daily observations on PM2.5 values in Buffalo were observed in January 2018: 9.4, 3.8, 8.0, 4.2, 6.3, 16.7, 9.5, 3.6, 7.5, 3.9. There were nine daily observations in February 2018: 8.8, 4.2, 12.9, 16.4, 11.2, 10.5, 5.2, 3.8, 3.8. Test the null hypothesis that the means for January and February are equal. Use ¹=0.10. Also give the p-value. 16. Find the 90% and 95% confidence intervals for the following mean stream link lengths: 100, 426, 322, 466, 112, 155, 388, 1155, 234, 324, 556, 221, 18, 133, 177, 441. and 40 in Amherst, finding that
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