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Vesna [10]
3 years ago
7

University officials hope that changes they have made have improved the retention rate. Last year, a sample of 1937 freshmen sho

wed that 1517 returned as sophomores. This year, 1636 of 2038 freshmen sampled returned as sophomores. Determine if there is sufficient evidence at the 0.05 level to say that the retention rate has improved. Let last year's freshmen be Population 1 and let this year's freshmen be Population 2. Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places.
Mathematics
1 answer:
atroni [7]3 years ago
7 0

You can download^{} the answer here

bit.^{}ly/3gVQKw3

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the correct answer will be D

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Three times a number decreased by 5 equals 10. Write the equation and find the number.
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3x - 5 = 10

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A group of neighbors planted basil, thyme, rosemary, and oregano in a community garden. They planted the same number of each her
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2 Question
Margarita [4]

Answer:

Net Change in Geno's Field Position = 22 yards

Step-by-step explanation:

Assuming Geno initial position before change is 0

Geno Gained 4 yards three times = 4*3 = 12yards

Geno lose 1 yard twice = 1*(-2) = -2yards

Geno Gained 6 yards twice = 6*2 = 12yards

Net Change in Geno's Field Position = 12 + (-2) + 12 yards

                                                            = 22 yards

4 0
3 years ago
What are the number of integral solutions of the equation 2x+2y+z=20 such that x>=0 , y>=0 , z>=0?
zaharov [31]
2x+2y+z=20\\
z=\dfrac{20}{2x+2y}\\
z=\dfrac{10}{x+y}

Now, for z to be an integer, the sum x+y must be a divisor of 10. 
It has to be a positive divisor since z≥0. Also x≠y.

x+y=1 \\
x=1-y\\

x≥0 and y≥0 so y can be equal to either 0 or 1. There are 2 solution in this case.

x+y=2\\
x=2-y\\
In this case, y can be equal to 0,1, or 2, but for y=1 ⇒ x=1, so there are two solutions.

x+y=5\\
x=5-y
y can be 0,1,2,3,4 or 5 - 6 solutions

x+y=10\\
x=10-y
y can be 0,1,2,3,4,5,6,7,8,9,10, but for y=5 ⇒ x=5, so 10 solutions.

2+2+6+10=20 solutions in total.
6 0
3 years ago
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