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timurjin [86]
3 years ago
6

2 to the power of 2 + 1 5

Mathematics
2 answers:
zzz [600]3 years ago
6 0

Answer:

2^2 + 15 = 19

Step-by-step explanation:

2 to the power of 2 literally equals 2 x 2 which is 4.

4 + 15 = 19

HOPE THIS HELPS

BRAINLIEST APPRECIATED AND PLZZ GIVE ME A THANKS

valkas [14]3 years ago
4 0

Answer:

2^2+15

4+15=19

19

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Hi! 

To compare this two sets of data, you need to use a t-student test:

You have the following data:

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You need to calculate the statistical t, and compare it with the value from tables. If the value you obtained is bigger than the tabulated one, there is a statistically significant difference between the two samples.

t= \frac{X1-X2}{ \sqrt{ \frac{(n1-1)* s1^{2}+(n2-1)* s2^{2} }{n1+n2-2}} * \sqrt{ \frac{1}{n1}+ \frac{1}{n2}} } =2,2510

To calculate the degrees of freedom you need to use the following equation:

df= \frac{ (\frac{ s1^{2}}{n1} + \frac{ s2^{2}}{n2})^{2}}{ \frac{(s1^{2}/n1)^{2}}{n1-1}+ \frac{(s2^{2}/n2)^{2}}{n2-1}}=33,89≈34

The tabulated value at 0,05 level (using two-tails, as the distribution is normal) is 2,03. https://www.danielsoper.com/statcalc/calculator.aspx?id=10

So, as the calculated value is higher than the critical tabulated one, we can conclude that the average speed for all vehicles was higher on Monday than on Wednesday.



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Answer:

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