1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Margaret [11]
2 years ago
10

20 pts to whoever helps!!

Mathematics
2 answers:
VladimirAG [237]2 years ago
7 0
<h3>Answer: B) 31.348</h3>

======================================

Work Shown:

We will never use the alpha = 0.05 value when computing the test statistic. So we can ignore alpha for this particular problem.

-------

n = 40 is the sample size.

s = 2.6 is the sample standard deviation

\sigma = sigma = 2.9 is the population standard deviation (ie the claimed standard deviation for all the pay phones)

Test Statistic for chi-square

\chi^2 = \frac{(n-1)*s^2}{\sigma^2}\\\\\chi^2 = \frac{(40-1)*(2.6)^2}{(2.9)^2}\\\\\chi^2 = \frac{39*6.76}{8.41}\\\\\chi^2 = \frac{263.64}{8.41}\\\\\chi^2 \approx 31.3483947681332\\\\\chi^2 \approx 31.348\\\\

padilas [110]2 years ago
3 0
The answer is B because—MOMMY I WANT CANDY ok sweetie I’ll give you some but Right now— OR ELSE I WILL TELL DADDY YOU CHEATED ON HIM— okay!! After giving my son candy.. DADDY YOU HOME!! Then he whispered “mom cheating on you” he gasped SWEETHEART I WANT A DIVORCE— but I’m busy helping someone on Brainly NOT NOW!!
You might be interested in
Is 2,293,714 divisible by 11?
LuckyWell [14K]
No it isnt because you get <span>208519.454545</span>
6 0
3 years ago
Convert the fractions to decimals.
AnnZ [28]
<span>3/20: 0.15
7/50: 0.14
9/25: 0.36
4/15: 0.266667
1/9: 0.111111
9/40: 0.225
5/16: 0.3125
7/9: 0.777778
13/20: 0.65
37/50: 0.74
11/30: 0.366667
19/40: </span>0.475
5 0
3 years ago
The quadratic function h(t) = -16t^2 + 120 represents the height of 120 feet. what is the height of the object after 1.5 seconds
Anettt [7]

Answer:

84 feet

Step-by-step explanation:

-16(1.5)^2+120=84

5 0
2 years ago
Write an equation in slope-intercept form that represents the situation:
BartSMP [9]

Answer:

<h2>          y = 3.5x + 15</h2>

Step-by-step explanation:

Number of months is x, and number of pairs of shoes after each month is y.

7 new pairs of shoes every 2 months means that after each month:

y = 7/2 x

We need to add the 15 pairs from start.

y = 3.5x + 15

6 0
3 years ago
In a toy factory 200 wooden soils cylinders 7 cm long and 35 mm in diameter have to be painted. What is the total surface area i
emmainna [20.7K]
By applying 2×pie×radius (radius+height)
This answer comes 1925000mm^3
6 0
2 years ago
Other questions:
  • 4. Find the center and the radius of the circle which circumscribes the triangle with vertices ai, a, a3. Express the result in
    15·1 answer
  • Is the output for this correct? (See full pic)
    13·2 answers
  • What is the value of Y?
    11·1 answer
  • What is the weight to the nearest pound of a person who is 64 inches tall and has a body mass index of 21.45
    14·1 answer
  • The figure shows the dimensions of a room. How much carpet is needed to cover the floor of the room?
    15·1 answer
  • I WILL GIVE BRAINLIEST LOTS OF POINTS!!!!<br><br><br> Answer The Question.
    8·1 answer
  • What is the solution <br> a: (6,5)<br> b: (5,6)<br> c: (1,2)<br> d: (2,1)
    11·2 answers
  • 3 n - 5 p + 2 n = 10 p for n
    10·1 answer
  • If tan2<br> x = 3 then value of<br> x is
    5·1 answer
  • See photo, it’s got to do with Pythagoras theorem but I don’t understand. Please help
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!