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Leni [432]
3 years ago
7

To estimate the average salary among people in a certain district, a marketing team obtains a simple random sample of 100 people

from that district. The team sets up the following approximate 90% confidence interval, using a normal estimate, for the unknown average salary (in dollars annually) of the district:
[41500,49750]

__________ Approximately 90% of the people in the district have a salary in the interval
__________ The procedure used to construct the interval works approximately 90% of the time.
_________For the normal estimate of 90% confidence to apply, the salary distribution in the population must be approximately normal.
Mathematics
1 answer:
bogdanovich [222]3 years ago
3 0

Answer:

The interpretation is that we are 90% sure that the true average salary of the district is in this interval.

Step-by-step explanation:

x% confidence interval:

A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.

In this question:

The 90% confidence interval for the average salary of the district is  [41500,49750].

This means that we are 90% sure that the true average salary of the district is in this interval.

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The arithmetic sequence a; is defined by the formula:
Morgarella [4.7K]

Answer:

The sum of the first 650 terms of the given arithmetic sequence is 2,322,775

Step-by-step explanation:

The first term here is 4

while the nth term would be ai = a(i-1) + 11

Kindly note that i and 1 are subscript of a

Mathematically, the sum of n terms of an arithmetic sequence can be calculated using the formula

Sn = n/2[2a + (n-1)d)

Here, our n is 650, a is 4, d is the difference between two successive terms which is 11.

Plugging these values, we have

Sn = (650/2) (2(4) + (650-1)11)

Sn = 325(8 + 7,139)

Sn = 325(7,147)

Sn = 2,322,775

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3 years ago
4. True or false: Lines, colors, and textures are often used to create shapes.
ioda

Answer:

true!

Step-by-step explanation:

because if we havent got lines, colors ,  and textures

how could shapes be created?

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1 year ago
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victus00 [196]
It is a

That the answer
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2 years ago
Find the total surface area of this triangle prim 18cm 14cm 30cm 7cm​
AleksandrR [38]

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Step-by-step explanation:

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2 years ago
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\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}

Actually Welcome to the Concept of the Functions.

Let's first find the g(-1),

so we get as

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=> 3 -5-6

=> -8

now since g(-1) =-8

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