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Natali5045456 [20]
3 years ago
6

Provided below are summary statistics for independent simple random samples from two populations. Preliminary data analyses indi

cate that the variable under consideration is normally distributed on each population. Decide whether use of the pooled​ t-test and pooled​ t-interval procedure is reasonable. x overbar 1equals461.8​, s 1equals46.4​, n 1equals9​, x overbar 2equals391.6​, s 2equals99.2​, n 2equals20 Is use of the pooled​ t-test and pooled​ t-interval procedure reasonable or not​ reasonable? Reasonable
Mathematics
1 answer:
Bezzdna [24]3 years ago
7 0

Answer:

Explained

Step-by-step explanation:

Not reasonable, because it is not given or mentioned in the question that population standard deviation are equal. Although, use of the pooled t-test and pooled t-interval procedure is reasonable because the population follows normal distribution.

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Two ducklings wander away from the nest while their mother is away. The first duckling's displacement (distance and direction) f
aksik [14]

the second duckling is wandering by 2.6 units distance than the first duckling .

<u>Step-by-step explanation:</u>

Here we have , Two ducklings wander away from the nest while their mother is away. The first duckling's displacement (distance and direction) from the nest is (12,5) The second duckling's displacement is (13,-8) . We need to find How much farther did the second duckling wander than the first duckling. Let's find out:

Let a = (12,5) and b =(13,-8)

The distance each duckling wandered is the magnitude of its displacement vector. Therefore, the expression Distance second duck wandered is given by :

⇒ D  = |b|-|a|

⇒ D  = \sqrt{13^2+(-8)^2} -\sqrt{12^2+5^2}

⇒ D  = \sqrt{233} -\sqrt{169}

⇒ D  =15.26 -13

⇒ D  =2.6

Therefore , the second duckling is wandering by 2.6 units distance than the first duckling .

4 0
3 years ago
Can I have somebody answer a few more of the questions that I need please and this one too?
tankabanditka [31]

Answer:

x > 22

Step-by-step explanation:

<em>Hey there!</em>

Well to solve,

52 - 3x < -14

we need to single out  x

52 - 3x < -14

-52 to both sides

-3x < -66

Divide both sides by -3

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The < changes to > because the variable number is a - being divided.

<em>Hope this helps :)</em>

7 0
3 years ago
Read 2 more answers
Hello i need help with question 5 asap!!
sergeinik [125]

Answer:

  arc DB length = 14π feet

Step-by-step explanation:

Assuming point A is the center of the circle, arc DC has measure 180°. Arc DB has measure 40° less, so is 140°. Since you want this in terms of π, we need to convert the degree measure to radians. We do that by multiplying by (π/180) radians per degree:

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__

Now that we know the arc measure in radians, we can find the length of the arc. It is given by the formula ...

  s = rθ

where r represents the radius and θ is the measure of the arc in radians.

The arc length is ...

  s = (18 ft)(7π/9) = 14π ft

Arc DB has a length of 14π feet.

4 0
3 years ago
Write the phrase as an expression<br> the quotient of 22 and a number a
RideAnS [48]
I believe the Answer is a/22 ( that’s a fraction )
5 0
3 years ago
Vhat is the ninth term of the geometric sequence 3,9, 27, ... ?
ExtremeBDS [4]
I think 36 but not sure
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