The marks obtained by six boys in a test are 20,25,15,30,27 and 18. Find the mea The table below shows the distribution of pupils who took part in various sports in
Type of sport
No. of students who play the sport
Football
14
Volleyball
22
Netball
38
Hockey
56
Ampe
90
a) What is the modal sport? (b) Draw a pie chart for the distribution,
-) Ifa pupil is selected at random from the school, what is the probability that he play​

Find the equation of the trend line (line of best fit). show your work i'm using the points (34,76) (42,91)

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.