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nevsk [136]
3 years ago
6

The college bookstore tells prospective students that the average cost of its textbooks is $92 per book, with a standard deviati

on of $15. The engineering students think that the average cost of their books is higher than the average for all students. To test the bookstore’s claim against their alternative, the engineering students collect a random sample of size 45, and calculate x = $97.34.
Grade: 5 4 3 2 1
Communication strong ←− − − − − − −→ weak ×2

Required:
Conduct a hypothesis test with α = 0.05 to see if the students’ claim is supported. Use the classical approach.
Mathematics
1 answer:
elena55 [62]3 years ago
4 0

Answer:

Following are the solution to the given question:

Step-by-step explanation:

Please find the attached file for the solution.

 

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Can someone help me out here ??
Vaselesa [24]

Answer:

6.04 inches

Step-by-step explanation:

1 in. = 100 Ft.

604 Ft / 100Ft = 6.04

5 0
3 years ago
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hello can plzz help me with this question wil mark u brainlest and its for 18 points the file is down below thank u :)
Hoochie [10]

Answer:

a rectangular prism

Step-by-step explanation:

consists of 6 faces which are rectangles

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3 years ago
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71 ×10 ^ 3 Scientific Notation​
kap26 [50]

Answer:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 1010. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

7.1×1047.1×104

7 0
3 years ago
Which is the focus of a parabola with equation y2 = 4x?
statuscvo [17]

Answer:

(1, 0)

Step-by-step explanation:

Please write this as y^2 = 4x; the " ^ " indicates exponentiation.

The appropriate equation for a horizontal parabola that opens to the right is

y^2 = 4px

Here, we are told that  y^2 = 4x; this tells us that 4p = 4, and so p = 1.  

Again, this parabola is a horizontal one and it opens to the right.  p = 1 is the distance of the focus from the vertex, and in this case p = 1.  Thus, the focus is at (1, 0) (situated on the x-axis).

6 0
3 years ago
The distance between two cities is 145 miles. A truck can cover this distance in 2.5 hours. The speed of a car is 1.5 times fast
iren2701 [21]
The truck can cover 145 miles in 2.5 hours, so the speed of the truck is 
145÷2.5=58 miles per hour
the car's speed is 1.5 times faster: 58×1.5=87 miles per hour
suppose in x hours they will meet:
distance covered by truck in x hour: 58x
distance covered by car in x hour: 87x
total distance: 145 miles
58x+87x=145
x=1
8 0
3 years ago
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