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nignag [31]
3 years ago
10

During the last week of the semester, students at a certain college spend on the average 4.2 hours using the school’s computer t

erminals with a standard deviation of 1.8 hours. For a random sample of 36 students at that college, find the probabilities that the average time spent using the computer terminals during the last week of the semester is a) At least 4.8 hours (Draw the bell curve) b)
Mathematics
1 answer:
matrenka [14]3 years ago
4 0

Answer:

0.97725

Step-by-step explanation:

Given :

Population mean, μ = 4.2

Population standard deviation, σ = 1.8

Sample size, n = 36

Obtain the Zscore of x = 4.8

Zscore = (x - μ) ÷ (σ / √n)

Zscore = (4.8 - 4.2) ÷ (1.8 / √36)

Zscore = 0.6 ÷ 0.3

Z = 2

Hence,

P(Z ≤ 2)

Using the Z probability calculator :

P(Z ≤ 2) = 0.97725

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Math. please help me!!!
d1i1m1o1n [39]

Part A.

In this part we have to find the increasing interval .

Increasing interval is that interval where graph goes up. And from the graph we can say that the graph goes up in the interval

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And that's the increasing interval .

Part B.

Correct option is B

x and y intercepts

x intercept is the point where graph touches the x axis. And the graph touches the x axis at x=-1 and 1 .

So the x intercepts are

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3 years ago
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yuradex [85]

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3 years ago
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I need some help on the following.. (40 Points!!)
Citrus2011 [14]

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3 years ago
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Can someone help me with this
katrin [286]

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8 0
3 years ago
I NEED ANSWERS ASAP!!! PLEASE
pychu [463]

Answer:

10 in by 48 in

Step-by-step explanation:

The volume (V) of a rectangular solid is calculated as

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Here h = 3 and V = 1440 , then

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A = 480 in²

The area of a rectangle = length × breadth

From the give options

10 × 48 = 480 ← is the only option

4 0
3 years ago
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