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Natalija [7]
3 years ago
9

Question help in​ statistics, what does df​ denote? if a simple random sample of 2424 speeds of cars on california highway 405 i

s to be used to test the claim that the sample values are from a population with a mean greater than the posted speed limit of 65​ mi/h, what is the specific value of​ df?
Mathematics
1 answer:
Sliva [168]3 years ago
5 0
N = 2424 is the sample size (amount of cars being sampled)
df = degrees of freedom
df = n-1
df = 2424-1
df = 2423

Side Note: if there is a typo and the sample size should be n = 24 (instead of 2424), then the df would be df = n-1=24-1 = 23
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Plz help and if u don't know then don't answer
Anon25 [30]
We see a right triangle here.
Use the Pythagorean Theorem:
a^2+b^2=c^2
a & b=legs
c=hypotenuse
a^2+15^2=20^2
a^2+225=400
a^2=175
a=13.2287565553
a=13.2
The missing side is 13.2cm
3 0
2 years ago
a)express x^2+12x+11 in the form (x+p)^2+q b)A curve has equation y=x^2+12x+11. What are the co-ordinates of the turning point o
sveticcg [70]

a) (x+6)^2-25

b) (-6, -25)

Step-by-step explanation:

Perfect square trinomial! If you have 12x, divide by two and get 6, so we have (x+6)^2+q. Then solve for q. You get q as -25.

For b, we just take the vertex from vertex form. We get x+6=0 so x=-6, and q = -25, so the answer is (-6, -25).

Hope that helped,

-sirswagger21

4 0
3 years ago
Which is the area of a square with one side that measures 1 foot? A. 1 square inch B. 100 square inches C. 144 square inches D.
cluponka [151]

Answer:

Option C. 144 square inches is the correct answer.

Step-by-step explanation:

We have been given a square with one side with a measurement of 1 foot and we have to calculate the area in square inches.

First we know that 1 foot of length = 12 inches on scale

Therefore side of the square is 12 inches

Now the area of the square will be = (Side×Side) = (Side)²

                                                          = (12)² = 144 square inches.

So the area of the square will be 144 square inches.

6 0
3 years ago
Which one?<br><br> a) <br> b) <br> c)<br> d)
Contact [7]

Answer:

d

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Use the box method to distribute and simplify (3X- 6)(3X +5) drag and drop the terms to the correct locations of the table
uranmaximum [27]

Answer:

9x^2 - 3x - 30

Step-by-step explanation:

      3x       l    5

3x l  9x^2  l   15x

    l    -----   l  ------

-6  l -18x    l  -30

7 0
3 years ago
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