Suppose that independent random samples of size n from two normal populations with the known variances σ₁² and σ₂² are to be used to test the null hypothesis μ₁ - μ₂ = δ₀ against the alternative hypothesis μ₁ - μ₂ = δₐ. Suppose further that the probabilities of type I and type II errors are to have the preassigned values α and β.
Show that the required size of the sample is given by

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

100 points, hi, i’m not sure what to do here,the data doesn’t seem to be quadratic .? can anyone me, in advance

Agraphic designer created a logo on eight and a half by 11 inch paper. in order to be placed on a business card, the logo needs to be one and 7/10 inches by 2 and 1/5 in. what is the scale factor of the dilation