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maw [93]
3 years ago
12

What number is standing between 2 and 7

Mathematics
1 answer:
Allushta [10]3 years ago
8 0
The number in between 2 and 7 is 4.5.
To find this, find the average of 2 and 7. 2+7 = 9. 9/2 = 4.5.
Hope that helped you.
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In this excerpt, the imagery appeals primarily to which
jek_recluse [69]

Answer:

Step-by-step explanation:

Sight.

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2 years ago
The median of 2,3,3,4,5,6,6,6,7,9
nekit [7.7K]

Answer:

11/2

Step-by-step explanation:

2,3,3,4,5,6,6,6,7,9

5+6/2

11/2

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6 0
2 years ago
The range of which function includes –4?
TiliK225 [7]

Answer:

The function f(x)=\sqrt{x-5}

Step-by-step explanation:

The Range of any function is complete set of all possible resulting values of the dependent variable , after substituting the domain.

so, the function f(x)=\sqrt{x-5} has range f(x)$\geq$ -5

This includes - 4 .

Hence, the function is f(x)=\sqrt{x-5} .

6 0
2 years ago
Read 2 more answers
The Weschler Intelligence Scale for Children (WISC) is an intelligence test designed for children between the ages of 6 and 16.
Ostrovityanka [42]

Answer:

a) \bar X = 121.4

b) SE = \frac{\sigma}{\sqrt{n}}= \frac{15}{\sqrt{40}}=2.372

c) 121.4-1.64\frac{15}{\sqrt{40}}=117.51    

121.4+1.64\frac{15}{\sqrt{40}}=125.29  

Step-by-step explanation:

Data given: 126,111,141,96,123,115,116,113,127,114,122,116,104,126,126,132,139,111,143,121,119,107,154,125,120,135,142,132,94,103,143,115,132,107,118,105,101,135,94,153

Part a

For this case we can calculate the sample mean with the following formula:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

And after replace we got:

\bar X = 121.4

Part b

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

For this case we assume that the population deviation is \sigma=15, we can calculate the standard error with this formula:

SE = \frac{\sigma}{\sqrt{n}}= \frac{15}{\sqrt{40}}=2.372

Part c

The confidence interval for the mean is given by the following formula:  

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)  

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a tabel to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that z_{\alpha/2}=1.64

Now we have everything in order to replace into formula (1):

121.4-1.64\frac{15}{\sqrt{40}}=117.51    

121.4+1.64\frac{15}{\sqrt{40}}=125.29  

8 0
3 years ago
Read 2 more answers
I need the answer Algebra question
Sav [38]
He had 32 dollars at the beginning of the day

5 0
3 years ago
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