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Nuetrik [128]
3 years ago
10

Pauline's cell phone bill is $39.99 a month for a fixed amount of minutes. For any minute she goes over the allowed amount, she

is charged $0.50 per minute. The equation represents her phone bill, where y is the total bill and x is the number of minutes. Which variable is the independent variable?
A. x

B. y

C. There is no relationship between the variables.
Mathematics
2 answers:
Semenov [28]3 years ago
4 0
The answer would be A. X
maksim [4K]3 years ago
3 0
The independent variable would be x , the number of minutes
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Please answer this question based on the following data. SSTR = 6,750 H0: μ1= μ2=μ3=μ4 SSE = 8,000 Ha: at least one mean is diff
Nookie1986 [14]

Answer:

P_v =P(F_{3,16}>4.5)=0.0180

So on this case the best option for the answer would be:

between .01 and .025

Step-by-step explanation:

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

If we assume that we have 4 groups and on each group from j=1,\dots,5 we have 5 individuals on each group we can define the following formulas of variation:  

SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2  

SS_{between=Treatment}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2 =6750  

SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2 =8000  

And we have this property  

SST=SS_{between}+SS_{within}=6750+8000=14750  

The degrees of freedom for the numerator on this case is given by df_{num}=k-1=4-1=3 where k =4 represent the number of groups.

The degrees of freedom for the denominator on this case is given by df_{den}=df_{between}=N-K=20-4=16.

And the total degrees of freedom would be df=N-1=20 -1 =19

We can find the MSR=\frac{6750}{3}=2250

And MSE=\frac{8000}{16}=500

And the we can find the F statistic F=\frac{MSR}{MSE}=\frac{2250}{500}=4.5

And with that we can find the p value. On this case the correct answer would be 3 for the numerator and 16 for the denominator.  

P_v =P(F_{3,16}>4.5)=0.0180

So on this case the best option for the answer would be:

between .01 and .025

6 0
4 years ago
(x^2+10x+20)/(x+4) find the quotient and remainder
denis23 [38]

The correct answer is x + 6, with a remainder of -4.

Work is shown using synthetic division.

4 0
3 years ago
The radius of a circle is 14 yards. What is the circle's circumference?
WINSTONCH [101]

Answer:

87.96yd

Step-by-step explanation:

C=2πr=2·π·14≈87.96459yd

4 0
3 years ago
If f(x)=7-2x find f(3)+6
vazorg [7]
To get the answer we have to substitute x=3 and add 6 to the result.
Lets do this
f(x)=7-2x
f(3)=7-2*3=7-6=1
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7 0
4 years ago
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