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katovenus [111]
4 years ago
15

A nutritionist attempts to determine an association between where food is prepared and the number of calories the food contains.

Which is most likely true? An association cannot be determined because the value 0.55 is similar to the value 0.45.
There is an association because the value 0.15 is not similar to the value 0.55. There is an association because the sum of each column is 1.0.
An association cannot be determined because the sum of the rows going across is not 1.0.
Mathematics
1 answer:
Oksi-84 [34.3K]4 years ago
8 0
Given the conditional relative frequency table below which was generated by column using frequency table data comparing the number of calories in a meal to whether the meal was prepared at home or at a restaurant.

Number of Calories and Location of Meal Preparation.
                                   Home                Restaurant            Total
≥ 500 calories              0.15                      0.55                  0.28

< 500 calories              0.85                      0.45                  0.72

Total                             1.0                        1.0                    1.0

To determine whether there is an association between where food is prepared and the number of carories the food contain, we recall that an "association" exists between two categorical variables if the column conditional relative frequencies are different for the columns of the table. The bigger the differences in the conditional relative frequencies, the stronger the association between the variables. If the conditional relative frequencies are nearly equal for all categories, there may be no association between the variables. Such variables are said to be <span>independent.

For the given conditional relative freduency, we can see that there is a significant difference between the columns of the table.
i.e. 0.15 is significantly different from 0.55 and 0.85 is significantly different from 0.45

Therefore, we can conclude from the given answer options that t</span><span>here is an association because the value 0.15 is not similar to the value 0.55</span>
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Question 12
WARRIOR [948]

Answer:

Mark's mass is 26 kg.

Step-by-step explanation:

Average mass of Jeremy, Mark and Zack = 28kg

Average mass of Jeremy and Zack = 29 kg

Let,

Jeremy's mass = x

Mark's mass = y

Zack's mass = z

Average of three of them = \frac{Jeremy's mass + Mark's + Zack's}{3}

28 = \frac{x+y+z}{3}\\

28*3 = x+y+z\\84 = x+y+z

x+y+z = 84     Eqn 1

29 =\frac{x+z}{2}\\58=x+z\\

x+z = 58    Eqn 2

Now putting value of x+z from Eqn 2 in Eqn 1

x + z + y = 84

58 + y = 84

y = 84 - 58

y = 26

Thereofore,

Mark's mass is 26 kg.

6 0
3 years ago
In ∆ASR, W, E and N are midpoints. Determine the lengths of each segment using the number bank.
NikAS [45]

9514 1404 393

Answer:

  A)  AS = 60

  B)  WE = 20

  C)  EN = 25

  D)  AR+RS-AS = 30

Step-by-step explanation:

Each midsegment is half the length of the parallel side. Each side is twice the length of the parallel midsegment.

A) AS = 2(WN) = 2(30) = 60

B) WE = RS/2 = 40/2 = 20

C) EN = AR/2 = 50/2 = 25

D) AR +RS -AS = 50 +40 -60 = 30

5 0
3 years ago
If b is inversely proportional to c, and b is 5 when c is 12, find b when c = 20
anzhelika [568]

4b = 12 . b = 3
6 0
3 years ago
A cube number is rolled 20 times and lands on 1 two times and on 5 four times. Find each experimental probability. Then compare
kykrilka [37]
The experiment probabilities are listed below:

One:  2 out of 20 = 2 / 20 = 0.1  or 10%

Four:  5 out of 20 =  5 / 20 = 1 / 4 = 0.25 = 25%

The theoretical probability of any single number is 1 out of 6 or about 17%.

The experimental probability for ones was less than and for fours it was greater than the theoretical probability. 
4 0
4 years ago
Help please an someone explain this to me i'm confused
maria [59]

Answer:

Jesus I can't help, I would take the educational guess if I was you

Step-by-step explanation:

7 0
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