The next 10 questions refer to the following scenario. The average student studies eight hours for a statistics exam and receives a grade of u = 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: 8 15

A:

Q: 11) 60

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

Q: Evaluate. 5(41)

A: We need to evaluate the value of 5(4!)

Q: Firefighter Fatalities Listed below are the numbers of heroic firefighters who lost their lives in…

A: The range is the difference between maximum and the minimum values,

Q: What is the probability of drawing a face card (Jack, Queen, or King) or a diamond from a standard…

A:

Q: 10) 21 68

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

Q: 9) 60

A: The figure is

Q: 7 11

A:

Q: 75 17

A: Given triangle is right angle triangle :

Q: Suppose that 103 Σ ai = 19 and i=1 103 i=1 b₁ = 18. Compute the sum.

A:

Q: sing the geometry of the graph ,evalvate the definite integrals.

A: As this is a multiple subpart question according to the Bartleby Answering rule, only first three…

Q: 6.3 3

A:

Q: 3) 24 12

A: We can find the value of x as below

Q: 8) 16 15

A: Answer is below

Q: 40 10

A:

Q: 1 19. 2

A:

Q: 4) 37 12

A:

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

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

Q: 29 33

A:

Q: We wish to estimate the average number of heartbeats per minute for a certain population The average…

A: Given  Xbar=sample mean=90, n=49, σ2=102

Q: 18 16

A: The objective is to find the value of x :  In the  given right triangle , Perpendicular = 16…

Q: Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the…

A: Formula : poisson distribution is given by

Q: 53. Faxt3

A: Given that, xa-1=ax+3 We need to solve it for x.