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Advocard [28]
3 years ago
6

If the height is 6 cm, what is the volume of the pyramid?

Mathematics
1 answer:
Alik [6]3 years ago
7 0

Answer:

128 cm

Step-by-step explanation:

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In the book Essentials of Marketing Research, William R. Dillon, Thomas J. Madden, and Neil H. Firtle discuss a research proposa
MakcuM [25]

Answer:

Null hypothesis:p_{1} = p_{2}  

Alternative hypothesis:p_{1} \neq p_{2}  

z=\frac{0.179-0.15}{\sqrt{0.17(1-0.17)(\frac{1}{140}+\frac{1}{60})}}=0.500  

p_v =2*P(Z>0.500)=0.617  

So the p value is a very low value and using any significance level for example \alpha=0.05, 0,1,0.15 always p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say the two proportions NOT differs significantly.  

Step-by-step explanation:

Data given and notation  

X_{1}=25 represent the number of homeowners who would buy the security system

X_{2}=9 represent the number of renters who would buy the security system

n_{1}=140 sample 1

n_{2}=60 sample 2

p_{1}=\frac{25}{140}=0.179 represent the proportion of homeowners who would buy the security system

p_{2}=\frac{9}{60}= 0.15 represent the proportion of renters who would buy the security system

z would represent the statistic (variable of interest)  

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

Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the two proportions differs , the system of hypothesis would be:  

Null hypothesis:p_{1} = p_{2}  

Alternative hypothesis:p_{1} \neq p_{2}  

We need to apply a z test to compare proportions, and the statistic is given by:  

z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}   (1)  

Where \hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{25+9}{140+60}=0.17  

Calculate the statistic  

Replacing in formula (1) the values obtained we got this:  

z=\frac{0.179-0.15}{\sqrt{0.17(1-0.17)(\frac{1}{140}+\frac{1}{60})}}=0.500  

Statistical decision

For this case we don't have a significance level provided \alpha, but we can calculate the p value for this test.    

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

p_v =2*P(Z>0.500)=0.617  

So the p value is a very low value and using any significance level for example \alpha=0.05, 0,1,0.15 always p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say the two proportions NOT differs significantly.  

6 0
3 years ago
Which of the following are continuous?
goldenfox [79]
E and D are continuous
7 0
3 years ago
Can someone please help me with these two questions
Eva8 [605]
The # 1 the answer is A
      # 2                      C
4 0
3 years ago
Read 2 more answers
Victor spent 1/2 of his salary on rent, 1/4 of the remainder on food and saved \mbox{Sh 1500). How much was his salary?​
8090 [49]

Nag basa nito walang jõwa

6 0
1 year ago
HELPPP!!! 10 PTS!<br><br> M angle (6x + 15) = _____
Llana [10]

Answer:

The value of  ∠(6x + 15) = 57°

Step-by-step explanation:

Here, ∠1 = (9x + 16)°

∠2 = (6x + 15)°  and  ∠3 = 136°

THE SUM OF EXTERIOR ANGLE IS THE SUM OF INTERIOR OPPOSITE ANGLES.

⇒ ∠1 +   ∠2 =  ∠3

or,   (9x + 16)° +  (6x + 15)°  = 136°

or, (9x+ 6x) + (16 + 15)  =  136°

or, 15x = 136° - 31 = 105°

⇒ x = 105° / 15 = 7

or,  The value of x  = 7

So, ∠2 = (6x + 15)°  = 6 (7)  + 15   =  57°

Hence the value of  ∠(6x + 15) = 57°

8 0
3 years ago
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