Answer:
The 90% confidence interval for the mean score of all takers of this test is between 59.92 and 64.08. The lower end is 59.92, and the upper end is 64.08.
Step-by-step explanation:
We have that to find our  level, that is the subtraction of 1 by the confidence interval divided by 2. So:
 level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of  .
.
So it is z with a pvalue of  , so
, so 
Now, find the margin of error M as such

In which  is the standard deviation of the population and n is the size of the sample.
 is the standard deviation of the population and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 62 - 2.08 = 59.92
The upper end of the interval is the sample mean added to M. So it is 62 + 2.08 = 64.08.
The 90% confidence interval for the mean score of all takers of this test is between 59.92 and 64.08. The lower end is 59.92, and the upper end is 64.08.
 
        
             
        
        
        
Answer:
89 green marbles and 46 blue marbles
Step-by-step explanation:
 
        
             
        
        
        
Answer:
x-int: (2, 0)
y-int: (0, -5)
To find the x-intercept, substitute in 0 for y. 
To find the y-intercept, substitute in 0 for x. 
hope this helps please make mine the brainliest
 
        
             
        
        
        
Answer:
$0.1966666
Step-by-step explanation:


 
        
             
        
        
        
Answer:
c is 2over 7
Step-by-step explanation:
if yk wat i mwan i mean in fractions like 2 on top and 7 at the bottom