Answer:
73.9
Step-by-step explanation:
multiply 5.50 by 8 and 14.95 by 2
EDIT: then add the products together
Divide by 9=7/11. Hope this help you
Answer:
A. 871.97 m
Step-by-step explanation:
Model this is a <u>right triangle</u>.
Use the <u>sine trigonometric ratio</u> to find the height of the weather balloon from the ground.
<u>Sine trigonometric ratio</u>
where:
is the angle- O is the side opposite the angle
- H is the hypotenuse (the side opposite the right angle)
Given:
- = 33°
- O = height
- H = 1601 m
Substitute the given values into the formula and solve for O:
Answer:
we reject H0 and conclude that management's belief about variance is untrue.
Step-by-step explanation:
H0 : σ² = 250
H1 : σ² ≠ 250
Sample size, n = 25
xbar = 50.6 ; s² = 500
α = 0.01 ;
The test statistic :
χ² = [(n - 1)s²] ÷ σ²
χ² = [(25 - 1)* 500] ÷ 250
χ² = (24 * 500) / 250
χ² = 12000 / 250
χ² = 48
The critical value:
df = n-1 ; 25 - 1 = 24
χ²(0.01/2 ; 24) = 45.559
Decison :
Reject H0 : if |χ² statistic| > critical value
Since 48 > 45.559
Hemce, we reject H0 and conclude that management's belief about variance is untrue.
form an idea of the amount, number, or value of; assess.
