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Marta_Voda [28]
3 years ago
7

What is the product of 8 and 54

Mathematics
1 answer:
Amanda [17]3 years ago
5 0
The product of 8 and 54 would be 
432
:)
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Professor Stats has 40 students in her statistics class. 24 of the students are male. If she randomly selects 6 of her students
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Answer:

the answer is 332

Step-by-step explanation:

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If A={g,y,m,n,a,s,t,i,c} and U={a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z}, find A′.
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A random sample of 16 students selected from the student body of a large university had an average age of 25 years. We want to d
kenny6666 [7]

Answer:

z=\frac{25-24}{\frac{2}{\sqrt{16}}}=2    

p_v =2*P(Z>2)=0.0455  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude that the true mean differs from 24 at 5% of significance

Step-by-step explanation:

Data given and notation  

\bar X=25 represent the sample mean

\sigma=2 represent the sample population deviation for the sample  

n=16 sample size  

\mu_o =24 represent the value that we want to test

\alpha=0.05 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean is different from 24, the system of hypothesis would be:  

Null hypothesis:\mu = 24  

Alternative hypothesis:\mu \neq 24  

If we analyze the size for the sample is < 30 but we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

z=\frac{25-24}{\frac{2}{\sqrt{16}}}=2    

P-value

Since is a two sided test the p value would be:  

p_v =2*P(Z>2)=0.0455  

Conclusion  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude that the true mean differs from 24 at 5% of significance

6 0
3 years ago
What are Multiple Representations
stich3 [128]

Answer:

Thus multiple representations are ways to symbolize, to describe and to refer to the same mathematical entity

4 0
2 years ago
Read 2 more answers
Which ratio is equivalent to 9: 180? А 5 200 B. 12 : 240 C 10 400 D 8 560​
pshichka [43]

Answer:

B. 12:240

Step-by-step explanation:

- 9:180

⇒ 1:20

Optiona (A) 5 : 200 it is not  multiple of 1:20, Eliminate.

Option (B) 12:240, it is multiple of 1:20 ( x 12) , quality

Option (C) 10:400 , Eliminate

Option (D) 8:560 , Eliminate

Hence, 12:240 is equivalent to 9:180.

6 0
2 years ago
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