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Katena32 [7]
3 years ago
9

Determine if the following statement is true or false.​ Why? The expected frequencies in a​ chi-square test for independence are

found using the formula below.
Expected frequency = (row total)(column total) / table total
Choose the correct answer below.
1. False. This formula gives the expected proportion. The (table total) factor in the denominator on the right should be squared.
2. True. It is a simplification of multiplying the proportion of a row variable by the proportion of the column variable to find the proportion for a cell, then multiplying by the table total.
3. True. The area to the right of this value in the corresponding chi-square distribution gives the P-value for the test.
4. False. The expected frequencies for a chi-square test are given by Oi - Ei/ Ei where i represents cell number.
Mathematics
1 answer:
a_sh-v [17]3 years ago
6 0

Answer:

Step-by-step explanation:

Download docx
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Alexxx [7]
<span>If logc81=2 then c=9

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A new youth sports center is being built in a safe harbor. The perimeter of the rectangular playing field is 510 yards. The leng
podryga [215]

Answer:

<h2>L=203 yards</h2><h2>W=52 yards</h2>

Step-by-step explanation:

Step one:

given data

perimeter= 510 yards

let the width be x, width=x

length= (4x-5)-----quadruple mean 4 times

Step two:

the expression for perimeter is

P=2L+2W

510=2(4x-5)+2x

510=8x-10+2x

510+10=8x+2x

520=10x

divide both sides by 10

x=520/10

x=52

the width is 52 yards

the lenght is  (4x-5)

L=4(52)-5

L=208-5

L=203 yards

4 0
3 years ago
The diagram shows two campsites on opposite ends of a lake and two triangles formed by intersecting segments from the campsites.
Aleks [24]

Answer:

x=42.3m

Step-by-step explanation:

x/47=82.8/92

92x=3891.6= 42.3m is the distance

6 0
3 years ago
Mark cycled 25 miles at a rate of 10 miles per hour. How long did it take Mark to cycle 25 miles
otez555 [7]
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8 0
3 years ago
Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning.
VARVARA [1.3K]

Answer:

h = a + b * t, this equation gives you the height of the candle after t hours, where:

h = height of the candle

t = hours of burning

a = the y intercept

b = the slope

Step-by-step explanation:

In your problem says that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. This means that the independent variable is t (hours of burning) and the dependent variable is h (height of the candle).

A linear function has the following form:

   y = f(x) = a + bx

a is the constant term or the y intercept. It is the value of the dependent variable when x = 0.

b is the coefficient of the independent variable. It is also known as the slope and gives the rate of change of the dependent variable.

NOTE:

In order to find numerical values you need at least two points in order to find the slope (t1,h1), (t2,h2), with this equation:

b = \frac{h_{2} - h_{1}}{t_{2} - t_{1}\\ } \\

Next you find a when x = 0, y = a, where y is one of the points that you want to evaluate.

With these values you put them in this equation h = a + b * t and that's it! You will find the height of the candle after t hours.

5 0
3 years ago
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