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ddd [48]
3 years ago
15

magine that you are conducting a one-variable chi-square test to investigate the hypothesis that there are equal numbers of cat

lovers and dog lovers in the office at work. Having conducted a survey, you found 150 preferred dogs and 120 preferred cats. What would the expected frequencies be in each cell? 135 150 and 120 270 More information is needed to calculate the expected frequencies.
Mathematics
1 answer:
lilavasa [31]3 years ago
5 0

Answer:

a. 135 is correct

Step-by-step explanation:

We have the following information:

dogs lover: 150

cats lover: 120

as the null hypothesis:

H, there are equal number of dogs lover and cats lover, so the expected frequency in each cell will be equal and that is:

f = (150 + 120) / 2

f = 270/2 = 135

so option a. 135 is correct

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2x + 3y = 1470
3y = -2x + 1470
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=================
y = -2/3x + 490
slope = -2/3
y int = (0,490)
=================
description of graphing : Plot ur point at (0,490). Since the slope is -2/3, starting at (0,490)...go down 2 and to the right 3,then down 2 and to the right 3 and you will eventually cross the x axis at the x intercept.

The x intercept can be found by subbing in 0 for y and solving for x
y = -2/3x + 490
0 = -2/3x + 490
2/3x = 490
x = 490 * 3/2
x = 1470/2 = 735...so ur x intercept is (735,0)

therefore, your line will cross the x axis at (735,0)
========================
function notation is : f(x) = -2/3x + 490
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suppose his profit is 1593....
2x + 3y = 1593
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differences : they have different x and y intercepts
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