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Deffense [45]
3 years ago
8

50 people sponsor Paula and she raises a total of 180 for charity. What is the mean average amount sponsored in pounds

Mathematics
1 answer:
crimeas [40]3 years ago
3 0

The mean is the average of the numbers.

It is easy to calculate: add up all the numbers, then divide by how many numbers there are.

For example: What is the Mean of these numbers?

6, 11, 7

<span><span>Add the numbers: 6 + 11 + 7 = 24 
</span><span>Divide by how many numbers (there are 3 numbers): 24 / 3 = 8</span></span><span>The Mean is 8

Hope this helps :)</span>
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Kendle has $35 to play g amount of games. Each game cost $5, which means she can play 7 games. This can be found by 35/5.

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4.22 x 1o^6 + 2.25 x 10^5 + 2.8 x 10^6
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There are three car salespeople at the local car dealership. The table below shows how many cars each salesperson has sold. Help
drek231 [11]

Answer:

A. Ronald

Step-by-step explanation:

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How is 3072 written in expanded form??
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3000 + 70 + 2

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A past survey of students taking a standardized test revealed that ​% of the students were planning on studying engineering in c
Angelina_Jolie [31]

Complete Question

The  complete question is shown on the first uploaded image  

Answer:

The  95% confidence interval is  -0.00870

Step-by-step explanation:

From the question we are told that

     The first sample  size  is  n_1  =  1068000

     The first proportion  \r p_1 = 0.084

     The second  sample size is  n_2  =  1476000

     The  second  proportion is  \r p_2 =  0.092

Given that the confidence level is  95%  then the level of significance is mathematically represented as

      \alpha =  (100 - 95)\%

     \alpha =  0.05

From the normal distribution table  we obtain the critical value of  \frac{ \alpha }{2}  the value is  

      Z_{\frac{\alpha }{2} } =z_c=  1.96

Now using the formula from the question to construct the 95% confidence interval we have  

  (\r p_1 - \r p_2  )- z_c \sqrt{ \frac{\r p_1 \r q_1 }{n_1} + \frac{\r p_2 \r q_2 }{n_2} }

Here \r q_1 =  1 - \r p_1

  =>   \r q_1 =  1 - 0.084

 =>    \r q =  0.916

and  

   \r q_2 =  1 - \r p_2

 =>   \r q_2 =  1 - 0.092

=>   \r q_2 = 0.908

So  

 (0.084 - 0.092 )- (1.96)*  \sqrt{ \frac{0.092* 0.916 }{1068000} + \frac{0.084* 0.908 }{1476000} }

  -0.00870

 

3 0
3 years ago
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