Answer:
 0.0623 ± ( 2.056 )( 0.0224 ) can be used to compute a 95% confidence interval for the slope of the population regression line of y on x
Step-by-step explanation:
Given the data in the question;
sample size n = 28
slope of the least squares regression line of y on x or sample estimate = 0.0623
standard error = 0.0224
95% confidence interval
level of significance ∝ = 1 - 95% = 1 - 0.95 = 0.05
degree of freedom df = n - 2 = 28 - 2 = 26
∴ the equation will be;
⇒ sample estimate ± ( t-test) ( standard error ) 
⇒ sample estimate ± (  ) ( standard error )
) ( standard error ) 
⇒ sample estimate ± (  ) ( standard error )
) ( standard error ) 
⇒ sample estimate ± (  ) ( standard error )
) ( standard error ) 
{ from t table; (  ) = 2.055529 = 2.056
) = 2.055529 = 2.056
so we substitute
⇒ 0.0623 ± ( 2.056 )( 0.0224 ) 
Therefore, 0.0623 ± ( 2.056 )( 0.0224 ) can be used to compute a 95% confidence interval for the slope of the population regression line of y on x
 
        
             
        
        
        
Answer:

Step-by-step explanation:
GIVEN: Suppose that in a certain county  of voters are registered as Democrats,
 of voters are registered as Democrats,  as Republicans,
 as Republicans,  as Green party, and the rest are considered Independents. You conduct a poll by calling registered voters in the county at random.
 as Green party, and the rest are considered Independents. You conduct a poll by calling registered voters in the county at random.
TO FIND: Probability that the first call will be to either a Democrat or a Republican.
SOLUTION:
Lets total population of county be  .
.
voters registered as Democrats 
                                                       
 
voters registered as Republicans 
                                                         
 
voters registered as Green party 
                                                        
Probability that first call will be to Democrats  
 
                                                                                     
Probability that first call will be to Republican  
 
                                                                                      
probability that the first call will be to either a Democrat or a Republican



Hence the probability that the first call will be to either a Democrat or a Republican is 
 
        
             
        
        
        
Answer:
Step-by-step explanation:
28° into radians
28° = ( 28   *   )
  )
Divide 28 and 180 by 4 we get 
= (  )
)
Hope it helped :)
  
 
        
                    
             
        
        
        
Answer:
C. x is y less than z
Step-by-step explanation:
x+y=z 
by using transposition 
x = z-y 
whatever x is, it is equal to the value of y taken from z