Answer:
<em>Test statistic </em>
<em>               </em> 
  
             t = <em>1.076</em>
Step-by-step explanation:
<u><em>Step(i):-</em></u> 
Given Mean of the Population (μ) = 8.0
<em>Mean of the sample (x⁻) = 8.25</em>
Given data 
                   8,9,9,8,8,9,8,7
Given sample size  n= 8
Given sample standard deviation(S) = 0.661
<u><em>Step(ii):-</em></u>
<em>Null hypothesis : H:  (μ) = 8.0</em>
<em>Alternative Hypothesis :H:(μ) > 8.0</em>
<em>Degrees of freedom = n-1 = 8-1=7</em>
<em>Test statistic </em>
<em>               </em> <em></em>
<em></em>
<em>              </em> <em></em>
<em></em>
<em>            t =  1.076</em>
<em>Critical value </em>
<em>                    t₍₇,₀.₀₅₎   = 2.3646</em>
<em>The calculated value   t =  1.076 < 2.3646 at 0.05 level of significance</em>
<em>Null hypothesis is accepted</em>
<em>Test the hypothesis that the true mean quiz score is 8.0 against the alternative that it is not greater than 8.0</em>
<em></em>
 
        
             
        
        
        
Answer: C. Parabola
Definition: a parabola is a conic section in which it is mostly characterised of having a U-shape wherein it is symmetrical and an open plane curve.
 
        
             
        
        
        
Answer:
$8.90
Step-by-step explanation:
((2)(2.90))+(3.10)= $8.90
 
        
                    
             
        
        
        
Answer:
4/5
Step-by-step explanation:
Sin is opposite / hypotenuse
Sin x= 16/20 
16/20= 4/5 
 
        
             
        
        
        
Answer:
D. 49
Step-by-step explanation:
When completing the square, you take the value after x^2 which is 14 and divide it by 2 which equals 7 for which you then square that number which 7 times 7 = 49