A university has 750 female students and 2250 male students. Thirty per cent of female students study chemistry and 60% of male students study it. If one student studying chemistry is chosen at random, what is the probability that the student is female?

Aiko jumped rope for 20 min and stopped at 8: 05 when did she start

Abottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. the water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. a random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.995 gallon a. construct a 99% confidence interval estimate for the popula-tion mean amount of water included in a 1-gallon bottle. b. on the basis of these results, do you think that the distributor has a right to complain to the water bottling company? why? c. must you assume that the population amount of water per bottle is normally distributed here? explain. d. construct a 95% confidence interval estimate. how does this change your answer to (b)?

What is the scale factor of this dilation? a) 1/2 b) 1/3 c) 2 d) 3