Answer:
-12.1
Step-by-step explanation:
At 1p.m., the temperature is -5.4c, and by midnight, it decreased 6.7c, so take -5.4c subtract 6.7c, and you got -12.1.
A manager wants to test whether two normally distributed and independent populations have equal variances. the appropriate test statistic for this test is a "F-statistics."
<h3>
What is F-statistics?</h3>
An F statistic is a value obtained after performing an ANOVA test or even a regression analysis to determine whether the means of two populations differ significantly.
Some key features regarding the F-statistics are-
- It is comparable to a T statistic from the a T-Test; a T-test would then inform you when a single result is statistically significant, whereas a F test would then tell you if a set of variables is statistically significant.
- When determining whether your total results are significant, you must use the F statistic in conjunction with the p value. Why?
- A significant result does not imply that all of your variables have been significant.
- The statistic is simply comparing the cumulative influence of all the variables.
To know more about the F-statistics, here
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Hello!
The ground, building and ladder are making a triangle, and since the ladder is tilted and is the longest side, it is the hypotenuse. We know how long the floor (leg) and ladder (hypotenuse) are. We need to solve for how tall the third floor window is from the ground. To do so we will use the Pythagorean Theorem (c²-b²=a²).
100-25=75
√75≈8.66
The third story window is about 8.66 meters from the ground.
I hope this helps!
Answer:
For x = 1, y = 2× 1² y =
= 2 × 1 = 2
= 2
For x = 2, y = 2× 2² y = 2²
= 2 × 4 = 4
= 8
Answer:
197 in ^2 (answer B of the list)
Step-by-step explanation:
Notice that this figure has a total of 6 faces, four of which are rectangles (whose area is calculated as "base times height") and two trapezoids (whose area is (B+b)H/2 ).
The total surface area is therefore the addition of these six areas:
Rectangles:
5 in x 5 in = 25 in^2
5 in x 5 in = 25 in^2
5 in x 6.4 in = 32 in^2
9 in x 5 in = 45 in^2
Trapezoids:
Two of equal dimensions: B = 9 in, b = 5 in, H = 5 in
2 * (9 in + 5 in) 5 in /2 = 70 in^2
Which gives a total of (25 + 25 + 32+45 + 70) in^2 = 197 in^2
This agrees with answer B of he provided list.