Given:
Sample size, n = 40
Sample mean, xb = $6.88
Population std. deviation, σ = $1.92 (known)
Confidence interval = 90%
Assume normal distribution for the population.
The confidence interval is
(xb + 1.645*(σ/√n), xb - 1.645*(σ/√n)
= (6.88 + (1.645*1.92)/√40, 6.88 - (1.645*1.92)/√40)
= (7.38, 6.38)
Answer: The 90% confidence interval is (7.38, 6.38)
Answer:
1/49 or 1/42
Step-by-step explanation:
if the letters are put back you would have a 2/7 chance of drawing the letter a each time but if they aren't replaced then you would have a 2/6 chance of getting a
Step-by-step explanation:
The variables w, x, and z are not needed because this expression only contain one variable, y
y= 5 It says it in the problem
Start by substituting the value of y into the expression
y+5 = 5+5
Solve
5+5 = 10
Solution: y+5 = 10
I hope this helps!!!
Answer:
4x^2
Step-by-step explanation:
Call the unknown side y
The area of the figure is
8x^3 *y = 32 x^5
Divide each side by 8 x^3
8x^3 *y / 8x^3 = 32 x^5 / 8x^3
y = 4 x^2
The unknown side is 4 x^2
Answer:
x= 45
Step-by-step explanation:
90-45=x
