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love history [14]
3 years ago
8

The chi-square test assesses whether the _____ observed in a cross-tabulation diverge from those one would expect under the null

hypothesis of no difference between groups.
Mathematics
1 answer:
pantera1 [17]3 years ago
3 0

Answer: Frequencies .

Step-by-step explanation:

In statistics theory the chi-square test statistic is calculated by considering each cell and the expected frequency is subtracted from the observed frequency after that the difference is squared, and the total is divided by the expected frequency. This is highlight that the key focus of the chi-square test is the frequencies .

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A treasure map says that a treasure is buried so that it partitions the distance between a rock and a tree in a 5:9 ratio. Marin
Tanya [424]
Let the coordinates of the treasure be (x,y).
Let d_{1} =  distance from the rock to the treasure.
Let d_{2} =  distance from the tree to the treasure.
 d_{1} = \sqrt{(x\2 + (y-2)^2}
d_{2} = \sqrt{(16-x)^2 + (21-y)^2}
We want \frac{ d_{1} }{ d_{2} } = 5/9 in order to locate the treasure. 

Note that 5/9 = 0.556 (approx)
Test (11.4, 14.2)
d1 = 14.8, d2 = 8.2, d1/d2 = 1.8           Incorrect
Test (7.6, 8.8)
d1 = 8.2,  d2 = 14.8,  d1/d2 = 0.554    Correct
Test (5.7, 7.5)
d1 = 6.13,  d2 = 16.98,  d1/d2 = 0.36   Incorrect
Test (10.2, 12.6)
d1 = 12.8,  d2 = 10.2,  d1/d2 = 1.255   Incorrect

Answer: The correct answer is (7.6, 8.8)
4 0
3 years ago
Read 2 more answers
HELPPP!!!
madam [21]

Answer:

2 and a half @ 2.5 inches (sorry i can't type the fraction)

Step-by-step explanation:

  • english is my second language so sorry if you doesn't understand:

(1/2, 1/4)=(x,y)

based on the graph shown that each grid on the y axis represents 1/4, that is the smallest scale stood in the y axis.

this means 2 grid= 1/4 x 2 = 1/2 @ 0.5 inches.

since the '5 months-hair-length' is above about 2 grid above 2 inch:

2 inch + 0.5 inch= 2.5 inch

4 0
3 years ago
Please help i know this is kind of easy but I am having a hard time with it unfortunately​
Len [333]

Answer:

C

Step-by-step explanation:

y= 60(2)+10

y=130

y=65(2)

y=130

8 0
3 years ago
When h has a value 4,calculate 5h+7
Colt1911 [192]
If h=4, then 5(4)+7= 27. Using PEMDAS, do multiplication first, so 20, then add the 7.
5 0
3 years ago
Read 2 more answers
A fruit punch recipe call for 30 cups of orange juice and 18 cups of pineapple juice. If you only have 1 cup of orange juice, ho
tankabanditka [31]

Answer:

You should use 0.6 cups of pineapple juice if you only have 1 cup of orange juice.

Step-by-step explanation:

With the information provided about the recipe, you can use a rule of three to find the cups of pineapple you should use if you only have 1 cup of orange juice given that the recipe calls for 30 cups of orange juice and 18 cups of pineapple juice:

30 cups of orange juice → 18 cups of pineapple juice

 1 cup of orange juice    →                    x

x=(1*18)/30=0.6 cups of pineapple juice

According to this, the answer is that you should use 0.6 cups of pineapple juice if you only have 1 cup of orange juice.

5 0
3 years ago
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