Answer:
C . Sample : 6 boy and 7 girls
Step-by-step explanation:
Data :
Boys = 150
Girls = 175
So ratio between boys and girls
175/150 = 1.67
So when boy is 6
6 ×1.667 = 7
Answer:
*gives help*
:)
Step-by-step explanation:
Answer:
39
Step-by-step explanation:
4 quarters x 4 weeks = 16 quarters
16 + 23= 39 quarters
Both methods assume a normal distribution of the data, but the z-tests are most useful when the standard deviation is known.
OR u can use , z-tests are used when we have large sample sizes (n > 30), whereas t-tests are most helpful with a smaller sample size (n < 30). Both methods assume a normal distribution of the data, but the z-tests are most useful when the standard deviation is known.
7x +2x+27 = 180
9x +27 = 180
-27 -27
9x = 153
÷9. ÷9
x = 17
ANSWER: B
