A random survey of 25 students in each grade level of a school was conducted to determine whether the students preferred to have less time between classes. The results are shown in the table.
Survey Results
Grade 6
Students
Grade 7
Students
Grade 8
Students
Less Time
14
10
6
More Time
10
15
14
Same Amount
of Time
1
0
5
There are 275 students in each grade. Based on the survey results, which statement is the best prediction about all
the students in these grade levels?
1-17

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?