The spinner shown is spun 300 times.
a) how many times would you expect the arrow
to stop on green if the spinner is fair?
the table below shows the number of times
the arrow stops on each colour.
colour blue red pink
frequency 45 | 37 | 52
green
94
purple
72
|
b) the spinner is spun once more.
estimate the probability of landing on purple.
c) if the spinner is spun another 1000 times,
about how many times would you expect it to land on blue?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.