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Rama09 [41]
3 years ago
13

Suppose a statistics instructor believes that there is no significant difference between the mean class scores of statistics day

students on Exam 2 and statistics night students on Exam 2. She takes random samples from each of the populations. The mean and standard deviation for 35 statistics day students were 75.86 and 16.91. The mean and standard deviation for 37 statistics night students were 75.41 and 19.73. What conclusion can be made based on the data
Mathematics
1 answer:
Andrew [12]3 years ago
6 0
Ion een know
I’m just doing it cause Brainly making me
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Simplify 3x + 5x + 14x
navik [9.2K]
Simply collect all the like terms together
So..3+5+14 is 22x
3 0
3 years ago
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Suppose on a certain planet that a rare substance known as Raritanium can be found in some of the rocks. A raritanium-detector i
Kamila [148]

Answer:

the probability the rock has raritanium is 0.9670

Step-by-step explanation:

These events have been defined as

Z: sample has raritanium

Y: the reading from detector is positive

Z': sample has no raritanium

Y': Reading from detector is negative

P(z) = 0.13

P(y'/z) = 0.02

P(y/z')= 0.005

We need to find p(z/y)

= p(z/y) = p(z ∩ y)/p(y)

= P(z) - p(z∩y)/0.13 = 0.02

Remember the value of p(z) = 0.13

So when we cross multiply we get

0.13 - p(z ∩ y) = 0.02 x 0.13

0.13 - p(z ∩ y) = 0.0026

-p(z ∩ y) = 0.0026 - 0.13

Such that

p(z ∩ y) = 0.1274

P(y/z')= 0.005

P(z∩y') = 0.005

Since p(z) = 0.13

P(z') = 1-0.13

P(y) - p(z∩y)/0.87 = 0.005

We cross multiply

P(y) - 0.1274 = 0.005x0.87

P(y) = 0.1274+0.00435

P(y) = 0.13175

We have 0.1274/0.13175

= 0.9670

So we conclude that probability rock has raritanium is 0.9670

3 0
3 years ago
GHJU is a rhombus. how could you prove that <3~=<2? this doesn’t have to be a formal proof, just a basic outline of an aug
hodyreva [135]

Answer:

Angle 3 is equal to Angle 2 because when you have a rhombus, the diagonals will always bisect the angles.

Step-by-step explanation:

8 0
3 years ago
You've decided to take 3 steps and randomly choose left or right as the direction each time.
Montano1993 [528]

Answer:

i would say b

Step-by-step explanation:

8 0
3 years ago
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#6thgrademath help
Effectus [21]
Is this math or algebra?
8 0
3 years ago
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