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
boyakko [2]
3 years ago
9

Select all numbers that have an absolute value of 4.

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
6 0

You didnt give us the numbers but it should be 4 and -4

You might be interested in
Health insurance benefits vary by the size of the company (the Henry J. Kaiser Family Foundation website, June 23, 2016). The sa
xxMikexx [17]

Answer:

\chi^2 = \frac{(32-42)^2}{42}+\frac{(18-8)^2}{8}+\frac{(68-63)^2}{63}+\frac{(7-12)^2}{12}+\frac{(89-84)^2}{84}+\frac{(11-16)^2}{16}=19.221

Now we can calculate the degrees of freedom for the statistic given by:

df=(rows-1)(cols-1)=(3-1)(2-1)=2

And we can calculate the p value given by:

p_v = P(\chi^2_{2} >19.221)=0.000067

And we can find the p value using the following excel code:

"=1-CHISQ.DIST(19.221,2,TRUE)"

Since the p values is higher than a significance level for example \alpha=0.05, we can reject the null hypothesis at 5% of significance, and we can conclude that the two variables are dependent at 5% of significance.

Step-by-step explanation:

Previous concepts

A chi-square goodness of fit test "determines if a sample data matches a population".

A chi-square test for independence "compares two variables in a contingency table to see if they are related. In a more general sense, it tests to see whether distributions of categorical variables differ from each another".

Solution to the problem

Assume the following dataset:

Size Company/ Heal. Ins.   Yes   No  Total

Small                                      32   18    50

Medium                                 68     7    75

Large                                     89    11    100

_____________________________________

Total                                     189    36   225

We need to conduct a chi square test in order to check the following hypothesis:

H0: independence between heath insurance coverage and size of the company

H1:  NO independence between heath insurance coverage and size of the company

The statistic to check the hypothesis is given by:

\sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}

The table given represent the observed values, we just need to calculate the expected values with the following formula E_i = \frac{total col * total row}{grand total}

And the calculations are given by:

E_{1} =\frac{50*189}{225}=42

E_{2} =\frac{50*36}{225}=8

E_{3} =\frac{75*189}{225}=63

E_{4} =\frac{75*36}{225}=12

E_{5} =\frac{100*189}{225}=84

E_{6} =\frac{100*36}{225}=16

And the expected values are given by:

Size Company/ Heal. Ins.   Yes   No  Total

Small                                      42    8    50

Medium                                 63     12    75

Large                                     84    16    100

_____________________________________

Total                                     189    36   225

And now we can calculate the statistic:

\chi^2 = \frac{(32-42)^2}{42}+\frac{(18-8)^2}{8}+\frac{(68-63)^2}{63}+\frac{(7-12)^2}{12}+\frac{(89-84)^2}{84}+\frac{(11-16)^2}{16}=19.221

Now we can calculate the degrees of freedom for the statistic given by:

df=(rows-1)(cols-1)=(3-1)(2-1)=2

And we can calculate the p value given by:

p_v = P(\chi^2_{2} >19.221)=0.000067

And we can find the p value using the following excel code:

"=1-CHISQ.DIST(19.221,2,TRUE)"

Since the p values is higher than a significance level for example \alpha=0.05, we can reject the null hypothesis at 5% of significance, and we can conclude that the two variables are dependent at 5% of significance.

3 0
3 years ago
Given the system of equations, what is the value of the system determinant?
weeeeeb [17]
2x + y = 8
x - y = 10
--------------add
3x = 18
x = 6

x - y = 10
6 - y = 10
-y = 10 - 6
-y = 4
y = -4

solution is : (6,-4)
6 0
3 years ago
Read 2 more answers
Translate each phrase into a variable expression. use n for the variable
gayaneshka [121]
N + 2 that is correct
8 0
3 years ago
Read 2 more answers
File:///Users/haroldpagunsan/Desktop/Screen%20Shot%202018-01-26%20at%2012.48.02%20PM.png
Orlov [11]
You can not put this on here :)
5 0
3 years ago
Anyone know this? Ill give brainliest if right pls help ^^
Varvara68 [4.7K]

Answer:

Female=14 male=6

Step-by-step explanation:

Oof this toke long I understand it now, for yesterday you gotta do  6+6+6+6+6=30 this is the male and so you add 14 to 30=44, now comes the important part of solving this problem. For today you gotta add 4 men and 4 women so you do 6+6+6+6=24 now 14+14+14+14=56 and if you add 56+24=80 .

4 0
3 years ago
Other questions:
  • Christy drove 270 miles in 6 hours at a constant speed how long would it take her to drive 405 miles at the same speed ?
    9·2 answers
  • Can someone explain how to solve this?
    6·1 answer
  • Which quadrilaterals always have diagonals that are perpendicular?​
    9·2 answers
  • The sale price of a drum kit in the UK is 950 Pounds + VAT (Value Added Tax), where VAT is a sales tax of 20%. After some negoti
    14·1 answer
  • 6x - 10 = 4x + 6 Which value of x makes this equation true?
    15·2 answers
  • <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%20-%203%7D%7Bx%20-%2010%20%7D%20%20%3D%20%20%5Cfrac%7B4%7D%7Bx%20%2B%204%7D%20"
    6·1 answer
  • ANSWER RIGHT NOW PLS!!<br> Add. −12+(−20) Enter your answer in the box.
    14·1 answer
  • 4. Ms. Beltran buys songs from a music website. She buys 20 songs for $12.
    12·1 answer
  • SOMEONE PLEASE HELP I will mark you BRAINLIST
    13·1 answer
  • 2. Find the cosine function that is represented in the graph.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!