Answer:
11cm
Step-by-step explanation:
Answer:
Step-by-step explanation:
1)
Percentile is related to the area under the standard normal curve to the LEFT of a certain data value (which in this case would be 26.1 inches).
On my Texas Instruments TI-83 Plus calculator, I found this area as follows:
normcdf(-100, 26.1, 28.4,1.2), where the range -100 to 26.1 represents the area (as a decimal fraction) to the left of 26.1 inches. My result was 0.028, which corresponds to the 3rd percentile (0.028 rounds off to 0.03, which would be 3rd percentile).
2) The mean waist size is 28.4 inches, represented by a vertical line through the standard normal curve lying between 24 and 32. We use the same function on the calculator: normcdf(24, 32, 28.4, 1.2).
The result is 0.9985. Subtracting this from 1.0000, we get 0.001, or 0.1%, which is the percentage of female soldiers requiring custom uniforms.
Answer:
The average rate of change from 1990 to 1991 is 
The average rate of change from 2000 to 2001 is 
Step-by-step explanation:
The average rate of change of function f(x) over the interval 
is given by
It is a measure of how much the function changed per unit, on average, over that interval.
From the information given:
- The function that models the population t years after 1990 is
- The year 1990 is t = 0 and the year 2000 is t = 10.
1. The average rate of change from 1990 to 1991 is:
The interval is 
2. The average rate of change from 2000 to 2001 is
The interval is 
The variance of a constant is zero. Rule 2. Adding a constant value, c, to a random variable does not change the variance, because the expectation (mean) increases by the same amount. ... Multiplying a random variable by a constant increases the variance by the square of the constant.
