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3 years ago

How many 3-digit passwords can be formed from the digits 0 through 9? 10 729 1,000 1,331

Mathematics

2 answers:

bekas [8.4K]3 years ago

7 0

Answer:

1000

Step-by-step explanation:

BartSMP [9]3 years ago

3 0

1st digit in 10 ways
2nd digit in 10 ways
3rd digit in 10 ways
Total number of ways = 10^3 = 1000

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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

Some help me please i have 9 questions

Lyrx [107]

awnser:

m<3=50

Step-by-step explanation:

seen in the picture if you need help let me know

5 0

3 years ago

Which term best describes the function represented by the graph?

inysia [295]

Answer:

Step-by-step explanation:

Its a straight line, and remember, you ALWAYS read graphs from left to right, so its linear increasing. :)

7 0

3 years ago

Thomas works as a salesperson on Saturday and Sunday at the verizon store he is payed 46.50 each day and for every smart phone h

Triss [41]

So he is paid 46.5 flat every day
he earns 5% of each smart phone he sells
at the time of the problem, smart phones sell for 70 so he earns 5% or 70 or 5/100 of 70 or 1/20 of 70 or 70/20 or 7/2 or 3 and 1/2 or $3.50 per phone he sells

so pay must be at lease 150 so
pay=46.5+ (# of phones times 3.50)
150<46.50+(number of pones times 3.50)
solve for number of phones
subtract 46.5 from both sides
103.5<(number of phonest imes 3.5)
divdie both sides by 3.5
29.57<number of phones
round up since can't sell a fraction of a phone
30
he has to sell at leas 30 phones

4 0

3 years ago

Solve for x (x+4)/3 = 2. a. x = -2 b. x=2 c. x = 2/3 d. x= -10/3

Ronch [10]

Answer:

<h2>The answer is option B</h2>

Step-by-step explanation:

$\frac{x + 4}{3} = 2$

To solve it first of all cross multiply

That's

x + 4 = 6

Move 4 to the right side of the equation

The sign changes to negative

That's

x = 6 - 4

We have the final answer as

Hope this helps you

8 0

3 years ago