Please to show clear workings a) State whether the following is a discrete or continuous random variable. i. Number of seeds in a tomato ii. The number of litres of water used per household iii. The ages of children in a preschool
Please to show clear workings
a) State whether the following is a discrete or continuous random variable.
i. Number of seeds in a tomato
ii. The number of litres of water used per household
iii. The ages of children in a preschool
b) Determine the sampling methods used in each of the scenarios below
i. Select every 9th candy bar from a production line to check its weight
ii. Group t-shirts by colors and select t-shirts at random from within each group in
proportion to the number of t-shirts that make up that group.
iii. Use random number tables to select 15 students from a class.
iv. Select 8 white cars, 5 blue and 3 red cars.
v. Name one advantage of the sampling method in ii)
c) The following stem-and leaf display shows the weight, in kilogram, boxes of juice
Stem-and-Leaf Display
N = * Leaf Unit = 0.1
9 0 002334666
20 1 01123356777
(**) 2 00122223346799
*** 3 56778899
12 4 0002344
5 5 66789
i. Determine the values of *, ** and ***.
ii. What is the value of the
iii. Find the modal weight of this data set.
iv. What is the
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