1. A student undertakes a project to determine the effect of carbon dioxide on respiration rate using the following methodology. A volunteer inhaled air from a bag containing a predetermined amount of carbon dioxide (with partial pressure measured in torr) and the number of breaths per minute was recorded. Her data are given below: Partial pressure CO2 (torr) Respiration rate (breaths/minute) 30 8.1 32 8.0 34 9.9 36 11.2 38 11.0 40 13.2 42 14.6 44 16.6 46 16.7 48 18.3 50 18.2 a). Construct a scatter plot of these data. Does there appear to be a linear relationship between the partial pressure of CO2 and respiration rate? b). Compute the linear regression equation so that Y may be predicted from X. c). Test the significant of this regression equation via ANOVA and t test with HO: B =0. d). Calculate the 95% confidence interval for slope B. e). Find the predicted respiration rate for a partial pressure of 38 torr (ûyx when X=38),. and the 95% confidence interval for this prediction. YIX

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Ratios

A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.

Trigonometric Ratios

Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.