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Naddika [18.5K]
3 years ago
10

Freshman, sophomore, junior, and senior students at a high school will be surveyed regarding a potential increase in the extracu

rricular student activities fee. There are three possible responses to the survey question - agree with the increase, do not agree with the increase, or no opinion. A chi-square test will be conducted to determine whether the response to this question is independent of the class in which the student is a member. How many degrees of freedom should the chi-square test have
Mathematics
1 answer:
Virty [35]3 years ago
8 0

Answer:

The degrees of freedom is 6 for the chi square independence test.

Step-by-step explanation:

This is test hypothesis of independence. The test statistic under H0 is

χ²= ∑ (O - E)²/ E

where O is the observed and E is the expected frequency

which  has an approximate chi square distribution with ( r-1) (c-1) degrees of freedom, where r= rows and c= columns.

Here there are 4 rows and 3 columns

Hence the degrees of freedom will be

( 4-1) ( 3-1)= 3*2= 6

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A triangle with equal sides has one side that is 32 cm. what is its perimeter?
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Perimeter =the length of border of a shape .....if its an equilateral triangle and one side is 32 then. Perimeter is three times the side.ie. 3x32=96cm
5 0
2 years ago
Use elimination to solve the system of equation<br> 4x+y=-2<br> 3x+2y=6
Basile [38]

Point form:

(-2,6)

Equation form:

x=-2, y=6

6 0
3 years ago
Six possibilities are equally likely and have payoffs of $2, $4, $6, $8, $10, and $12. the expected value is:
igomit [66]

The expected value is even

8 0
3 years ago
Sophia is 12 years old. Her Uncle Reynald tells her that if she adds 5 to her age, multiplies the sum by 3, and then subtracts 4
sasho [114]

Answer:

Her uncle's age = 47 years

Step-by-step explanation:

Sophia = 12 years old

Her Uncle Reynald tells her that if she adds 5 to her age,

= 12 + 5

multiplies the sum by 3

= (12 + 5) × 3

and then subtracts 4 from the product

= {(12 + 5) × 3} - 4

she will find his age

{(12 + 5) × 3} - 4

= (17 × 3) - 4

= 51 - 4

= 47

Her uncle's age = 47 years

Sophia wrote:

12 + 5 × 3 − 4

Using PEMDAS

P - product

E - exponent

M - multiplication

D - division

A - addition

S - subtraction

Sophia's expression can be written as = 12+(5*3)-4

= (12 + 15) - 4

= 27 - 4

= 23

Sophia's expression is wrong

8 0
3 years ago
This is the same triangle you used for Question 2.
sveta [45]

Answer:

93

Step-by-step explanation:

in your answer, give the measure of Angle C and explain how you calculated it.

i dont know the answer but i just added 3(29+2) and got 29 sorry if its wrong

8 0
2 years ago
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