We have an equation: 2/1= ?/2.25
Cross multiply:
1*?= 2*2.25
⇒ ?= 2*2.25= 4.5
The final answer is 4.5~
parallelogram , opposite sides are equal
so
PR = QS
and
PQ = RS
4x - 1 = 3x + 7
x = 8
PQ = 4(8) - 1 = 32 -1 = 31
Given P = 74 cm
74 - 2(31) = 12
PR = QS = 12/2 = 6
Answer
QS = 6 cm
Answer is C. 13 Find with Magnitude √(x1-x2)²+(y1-y2)² = √25+ 144 = √169 = 13 units
Sample space ={13 H + 13 D + 13 S + 13 C} = 52 cards
P(getting one heart) = 13/52 = 1/4
P( getting NO heart) = 1-1/4 = 3/4 = 0.75
The chi-squared test statistic will be 3.11. The test statistic is contrasted with a predicted value based on the Chi-square distribution.
<h3>What is the chi-squared test statistic?</h3>
Finding the squared difference between the actual and anticipated data values, then dividing that difference by the expected data values, constitutes the test statistic.
The formula for the chi-squared test statistic is;
![\sum \frac{(O_i-E_i)^2}{E_i } \\\\](https://tex.z-dn.net/?f=%5Csum%20%5Cfrac%7B%28O_i-E_i%29%5E2%7D%7BE_i%20%7D%20%5C%5C%5C%5C)
Where,
is the observed value
is the expected value
The chi-square test statics is;
![\rm( \frac{18-18}{18} )^2 +( \frac{14-18}{18} )^2 + (\frac{24-18}{18} )^2+( \frac{16-18}{18} )^2 \\\\ 0+ \frac{16}{18}+ \frac{36}{18} +\frac{4}{18}\\\\ \frac{56}{18} \\\\ 3.11](https://tex.z-dn.net/?f=%5Crm%28%20%5Cfrac%7B18-18%7D%7B18%7D%20%29%5E2%20%2B%28%20%5Cfrac%7B14-18%7D%7B18%7D%20%29%5E2%20%2B%20%28%5Cfrac%7B24-18%7D%7B18%7D%20%29%5E2%2B%28%20%5Cfrac%7B16-18%7D%7B18%7D%20%29%5E2%20%5C%5C%5C%5C%200%2B%20%5Cfrac%7B16%7D%7B18%7D%2B%20%5Cfrac%7B36%7D%7B18%7D%20%2B%5Cfrac%7B4%7D%7B18%7D%5C%5C%5C%5C%20%5Cfrac%7B56%7D%7B18%7D%20%5C%5C%5C%5C%203.11)
Hence, the chi-squared test statistic will be 3.11.
To learn more about the chi-squared test statistic refer;
brainly.com/question/14082240
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