EW TREND 120 students were surveyed to find out which of the four modes of transport, by public transport, by car,
foot and others, the students use to travel to school daily. The table shows the results of the survey
Walk
Other
Public Transport
22
Car
17
12
Males
Females
20
37
Total
16
21
(a) How many females use public transport?
(b) A pie chart is to be drawn showing the data of the survey.
Calculate the angle representing students walking to school.
C)In which group, males or females, did a greater percentage use other modes of transport and by
much?

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?