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TiliK225 [7]
3 years ago
6

Can somebody help me with this , please i also need the work progress ;-;​

Mathematics
1 answer:
nydimaria [60]3 years ago
4 0
Need help with what?:)
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Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5
iris [78.8K]

Answer:

By the Empirical Rule, 99.7% of the students have grade point averages that are between 1.28 and 3.8.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed(bell-shaped) random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 2.54

Standard deviation = 0.42.

Between 1.28 and 3.8?

1.28 = 2.54 - 3*0.42

So 1.28 is 3 standard deviations below the mean

3.8 = 2.54 + 3*0.42

So 3.8 is 3 standard deviations above the mean

By the Empirical Rule, 99.7% of the students have grade point averages that are between 1.28 and 3.8.

5 0
3 years ago
Read 2 more answers
James estimated the total cost of groceries to be $50. The actual cost of the groceries is $65. What is the percent error? Round
diamong [38]

Answer:

Was it James charles who estimated the total cost

6 0
3 years ago
What is the union for two sets a={1,5,8,12,17} and b={5,17}
Anna11 [10]

the correct answer is actually {1, 5, 8, 12, 17}

5 0
3 years ago
Four students decide to flip a coin a number of times and record their results. Dan flips his coin 5 times, Kelly flips her coin
Tcecarenko [31]

Answer:

Judah

Step-by-step explanation:

Because the more times you do the same thing over and over again then average it the more accurate it becomes

7 0
3 years ago
Evan is making a table that will be created in the shape of the figure below. The table top is a triangle attached to a rectangl
Yakvenalex [24]
Given:
Triangle:
height = 6ft
base = 4ft

Rectangle:
length = x
Width = 6 ft

Surface Area = 150ft²

Area of a Triangle = h*b / 2 = (6ft * 4ft) / 2 = 12ft²

Area of a rectangle = Surface Area - Area of a Triangle
A = 150 ft² - 12 ft² = 138 ft²

138 ft² = x * 6ft
138 ft² / 6 ft = x
23 ft = x.
6 0
3 years ago
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