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elixir [45]
3 years ago
11

The scores of individual students on the american college testing (act) program composite college entrance examination have a no

rmal distribution with a mean of 18.6 and a standard deviation of 6.0. at northside high, 36 seniors take the test. assume the scores at this school have the same distribution as national scores. what is the mean of the sampling distribution of the sample mean score for a random sample of 36 students?
Mathematics
1 answer:
Alona [7]3 years ago
3 0
The mean of the distribution of the sampling mean is the same as the mean of the population, 18.6.
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Sphinxa [80]

Answer:

A ≈ 2 ft²

Step-by-step explanation:

The area (A) of a triangle using Heron's formula is

A = \sqrt{s(s-a)(s-b)(s-c)}

where s is the semiperimeter and a, b , c the sides of the triangle.

s = \frac{a+b+c}{2} = \frac{4+4+1}{2} = \frac{9}{2} = 4.5

Then

A = \sqrt{4.5(4.5-4)(4.5-4)(4.5-1)}

   = \sqrt{4.5(0.5)(0.5)(3.5)}

   = \sqrt{3.9375}

   ≈ 1.9843...

   = 2 ft² ( to the nearest square foot )

8 0
2 years ago
Add. [12 −6 −10]+[−2 14 5 15]
lions [1.4K]

Answer:

A)

Step-by-step explanation:

8 0
3 years ago
A normal probability distribution
julia-pushkina [17]

Answer:

Option B) is a continuous probability distribution          

Step-by-step explanation:

Properties of a normal probability distribution:

  • The mean, mode and median of the data is same.
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Thus, from the properties of normal distribution, the correct answer is:

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6 0
3 years ago
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Wittaler [7]

Answer:

Step-by-step explanation:

+

5

1

6

=

−

1

n+\frac{5}{16}=-1

n+165​=−1

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1

Subtract

5

1

6

\frac{5}{16}

165​

from both sides of the equation

+

5

1

6

=

−

1

n+\frac{5}{16}=-1

n+165​=−1

+

5

1

6

−

5

1

6

=

−

1

−

5

1

6

n+\frac{5}{16}{\color{#c92786}{-\frac{5}{16}}}=-1{\color{#c92786}{-\frac{5}{16}}}

n+165​−165​=−1−165​

2

Simplify

Solution

=

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1

3 0
3 years ago
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postnew [5]

Answer:

8%

Step-by-step explanation:

234.25$ : 100 = 252.99$ : x

234.25x = 252.99 x 100

234.25x = 25299

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so answer 8%

6 0
3 years ago
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