t distribution behaves like standard normal distribution as the number of freedom increases.
Step-by-step explanation:
The question is missing. I will give a general information on t distribution.
t-distribution is used instead of normal distribution when the <em>sample size is small (usually smaller than 30) </em>or <em>population standard deviation is unknown</em>.
Degrees of freedom is the number of values in a sample that are free to vary. As the number of degrees of freedom for a t-distribution increases, the distribution looks more like normal distribution and follows the same characteristics.
First, we get the area of each tile: (100 cm = 1m) .20 m* .15 m = 0.03m^2 Then, we solve for the total area of the wall: 5m*3m= 15m^2 Then we divide 15/0.03 = 500 tiles
