In the case that the standard deviation of the population is known and the population distribution is normal, even if the sample is small, we will use a z-test.

The usual case is to not know the standard deviation of the population, in which case a t-test is adequate instead of a z-test, taking into account the degrees of freedom of the sample.

5 0

3 years ago

Find the y-intercept of the parabola whose equation is f(x)=-2x^2-8x+5

tatyana61 [14]

Answer:

i'm pretty sure the y-intercept would be 5

6 0

4 years ago

Evaluate the expression below for the given values. 1/2×+ 1/3 y for x=2 and y=5

kirill115 [55]

Approximately 2.66 I think

4 0

3 years ago