Answer:
Q6. D
Q8. A
Step-by-step explanation:
Q6. In 40 trials, he flipped '2 heads and 1 tail' 16 times.
For 2 heads, probability= 16/40= 4/10
For 120 trials, number of times= 4/10 × 120= 48
Q8.

Answer is A because the inequality shows that x is equal or greater than 8 so the dot at 8 has to be coloured.
Note that we do not change the inequality sign unless we are dividing the whole thing by -1.
 
        
             
        
        
        
Joubert hint all ineyzreytfcfvbubu equals 9
        
             
        
        
        
Answer:
Step-by-step explanation:
Easy the three angles of a triangle equal 180 degrees 
so 60+75 = 135 --> 180-135= 
1) 145
2) 35
3)  no since the tops a 100 and its a Isosceles triangle two corners left it be 40 for each corner 
4) 34 for both x's cause 34+34+112. = 180
5) 180- 120= 60- 10 = 50/4 is (12.5)= x
6) x = 15 cause it be 120- 60 to get 60 
 
        
                    
             
        
        
        
Answer  it's a closed dot on positive 2 going to the left
Step-by-step explanation:
 
        
             
        
        
        
<h2>
Answer with explanation:</h2>
Let  be the population mean lifetime of circulated $1 bills.
 be the population mean lifetime of circulated $1 bills.
By considering the given information , we have :-

Since the alternative hypotheses is two tailed so the test is a two tailed test.
We assume that the lifetime of circulated $1 bills is normally distributed.
Given : Sample size :  n=50 , which is greater than 30 .
It means the sample is large so we use z-test.
Sample mean : 
Standard deviation : 
Test statistic for population mean :-


The p-value= 
Since the p-value (0.0433834) is greater than the significance level (0.02) , so we do not reject the null hypothesis.
Hence, we conclude that we do not have enough evidence to support the alternative hypothesis that the average lifetime of a circulated $1 bill differs from 18 months.