Mathematics 3 ESO – Unit 13 STATISTICS page 115 activity 34
- a) In Bombay there are 25.000 restaurants. We ask in 15 restaurants how many waiters work in the restaurant.
The answers are: 3, 5, 3, 1, 2, 6, 3, 4, 1, 3, 2, 4, 5, 2, 4.
- What is the population?
- What is the sample?
- What is the random variable?
- Make a frequency table.
b) Give two examples of discrete qualitative random variables.
c) Give two examples of continuous qualitative random variables.
d) Make a frequency table for this histogram:
- e) Watch the video on “Mean Median & Mode Song” and answer:
- I) How do we find the mean?
- II) How do we find the median for an even number of items?
- III) What is the mode if there isn’t a number that repeats most often?
- f) We measure the time it takes an antibiotic to cure patients. We repeat the experiment with ten different types of bacteria. The results (in hours) are: 47, 83, 53, 56, 53, 55, 61, 59, 64, 54.
- I) What is the mean?
- II) What is the mode?
- III) What is the median?
- IV) What is the range?
- V) What is the variance?
- VI) What is the standard deviation?
