The next 10 questions refer to the following scenario. The average student studies eight hours for a statistics exam and receives a grade of :84. In a sample of 25 students who study twelve hours for a statistics exam you find that the average grade is X = 87. You want to test the hypothesis that studying twelve hours statistically significantly increases academic performance.

Q: 4)1993

A:

Q: 11) 60

A: Here I am attaching image so that you understand each and every step.

Q: 5. 13 12 9.

A:

Q: 7)84

A: The objective of the question is solve the division.

Q: 12 X-

A: The solution is given below

Q: 4 6 68

A: Consider the given division of 668 by 4. The objective of the problem is to perform the division.

Q: 10) 21 68

A: We know that tan θ=Opposite sideAdjacent sidetan(68)=x21

Q: 9) 60

A: The figure is

Q: 72

A: here we will find value of x ,

Q: 4 11  ✕  5 9

A: Consider the given expression as 411×59. 411×59=4×511×9=2099

Q: 18 20

A:

Q: 6)270

A: Given data:   The given expression is 270/6.     The number 270 can be written as, 270=3×90=3×2×45

Q: 8 14

A:

Q: 6.3 3

A:

Q: Speedometer readings for a vehicle (in motion) at 14-second intervals are given in the table. t…

A: we need to find the distance travelled

Q: 8) 16 15

A: Answer is below

Q: 2. 14 11

A: To find x.

Q: Find the value of each variable.

A: The solution is:

Q: 5. 20 52

A:

Q: 19 17 E31

A:

Q: 4) 37 12

A:

Q: 11 11 4. 64

A: Given: simplify the expression

Q: 10 4 2.

A: Solution-

Q: 6. 4 Z+ 1 z+ 7 2.

A: Given,  4/(z + 1)  =  2/(z + 7)  To find value of z.

Q: 73

A:

Q: 14 19

A: To find :- x  Given :- Base = 14 , Hypotenuse = x ,               and θ= 49°   By using…

Q: 5.1 16

A:

Q: 5) 23

A: To find The other side of the given figure.

Q: 29 33

A:

Q: Let A(x) represent the area bounded by the graph, the horizontal axis, and the vertical lines at t =…

A:

Q: 21) 1,177

A: We need to perform division.

Q: 225 x 45= %|

A: