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bija089 [108]
3 years ago
7

Consider the following expression and determine which statements are true.

Mathematics
1 answer:
Masja [62]3 years ago
5 0

Answer:

m+5nx(9-p)-6-2r

The answer is b and d

Step-by-step explanation:

Hopefully this helped, if not HMU and I will gt you a better answer.

<em>-have a great day! :)</em>

<em />

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((8x1.95) + (3x2.95) + 10.95) x 1.06
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Read 2 more answers
Set Question involving real and natural numbers
Allushta [10]

Only two real numbers satisfy x² = 23, so A is the set {-√23, √23}. B is the set of all non-negative real numbers. Then you can write the intersection in various ways, like

(i) A ∩ B = {√23} = {x ∈ R | x = √23} = {x ∈ R | x² = 23 and x > 0}

√23 is positive and so is already contained in B, so the union with A adds -√23 to the set B. Then

(ii) A U B = {-√23} U B = {x ∈ R | (x² = 23 and x < 0) or x ≥ 0}

A - B is the complement of B in A; that is, all elements of A not belonging to B. This means we remove √23 from A, so that

(iii) A - B = {-√23} = {x ∈ R | x² = 23 and x < 0}

I'm not entirely sure what you mean by "for µ = R" - possibly µ is used to mean "universal set"? If so, then

(iv.a) Aᶜ = {x ∈ R | x² ≠ 23} and Bᶜ = {x ∈ R | x < 0}.

N is a subset of B, so

(iv.b) N - B = N = {1, 2, 3, ...}

3 0
2 years ago
A researcher reports an F-ratio with df = 2, 18 from an independent-measures research study. Based on the df values, how many tr
Romashka-Z-Leto [24]

Answer:

b. 3 treatments and 21 subjectcs

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"  

On this case we have 4 degrees of freedom for the numerator and 95 for the denominator.  

If we assume that we have k groups and on each group from j=1,\dots,n_j we have n_j 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}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2  

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

And we have this property  

SST=SS_{between}+SS_{within}  

The degrees of freedom for the numerator on this case is given by df_{num}=df_{within}=k-1 where k  represent the number of groups or treatments.  So then if we solve for k we got k=df_{num}+1=2+1=3

The degrees of freedom for the denominator on this case is given by df_{den}=df_{between}=N-k.  And we can solve for N like this:

N=df_{den}+k =18+3=21 so we have 21 individuals in total

And the total degrees of freedom would be df=N-1=21 -1 =20

On this case the correct answer would be:

b. 3 treatments and 21 subjectcs

8 0
3 years ago
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