If I have 2 for the degrees of freedom with an alpha of 0.05, what would be the critical value of t?

The pmf of the amount of memory X (GB) in a purchased flash drive is given as the following. 1 4 8 16 p(x) 0.05 0.20 0.25 0.30 0.20 2 (a) Compute E(X) (in GB). (Enter your answer to two decimal places.) GB (b) Compute V(X) (in GB2) directly from the definition. (Enter your answer to four decimal places.) GB2 (c) Compute the standard deviation of X (in GB). (Round your answer to three decimal places.) GB (d) Compute V(X) (in GB2) using the shortcut formula. (Enter your answer to four decimal places.) GB²

Suppose the number of bacteria in a culture increases by 50% every hour if left on its own. Assuming that biologists decide to remove approximately one thousand bacteria from the culture every 10 minutes, which of the following equations best models the population P = P(t) of the bacteria culture, where t' is in hours? A. dP = 5P-1000 dt dP B. at dP C. dt dP D. dt E. dP at = 5P-6000 1.5P-6000 = 1.5P-1000 = -5P-1000

If two resistors with respective resistance R1 and R2 are hooked up in parallel, the net resistance R is related to R1 and R2 by 1/R = 1/R1 + 1/R2. If the resistances are measured in ohms as R1 = 150Ω, R2 = 400Ω, both with a possible error of 10%, what is the net resistance and the maximum possible error in the calculated value of R?