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Nady [450]
3 years ago
9

33. The standard deviation divided by the square root of the sample size n is equal to the _______________ of the mean. Sample e

rror Sampling error Critical value Standard error
Mathematics
1 answer:
kupik [55]3 years ago
4 0

Answer:

Standard error

Step-by-step explanation:

Standard error: In statistics, the term standard error is also denoted as SE, and is reffered to as the estimate of a particular parameter.

It is defined as the standard deviation in statistics related to its sampling distribution or else the the standard deviation's estimate.

Therefore, if a particular parameter or statistic is considered as a mean then it would be denoted as the standard error of that mean.

The standard error of an estimate may also be defined as the square root of the estimated error variance √\sigma^{2} of the quantity,

 

S_{e} =√\sigma^{2}

In the given question, the appropriate answer would be standard error.

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In response to the increasing weight of airline passengers, the Federal Aviation Administration in 2003 told airlines to assume
solong [7]

Answer:

the approximate probability that the total weight of the passengers exceeds 4668 pounds is 0.0089

Step-by-step explanation:

Using the central limit Theorem

z = (x - u )/Q÷ sqrt n

Where z is the z-score

x is the average weight = 4668/22 = 212.2

u is the passengers average = 194 pounds

Q is standard deviation = 36 pounds

Therefore

z= (212.2 - 194) / 36 ÷ sqrt22

= 18.2/ 36÷ 4.69

= 18.2/7.68

z=2.3698 aprx 2.37

Find the value of 2.37 z-score on the z-table to determine the approximate probability

P(z>2.37) = 0.0089 (from the z-table)

6 0
3 years ago
Read 2 more answers
Simplify the following algebraic expression: 2 (2x + 3y) + 3 (5 – 2x) +1+y
Gnoma [55]

Answer: -2x+7y+16

Step-by-step explanation:

1. Distribute 2 through the parentheses

  • 4x+6y+3(5-2x)+1+y              
  • 4x+6y+15-6x+1+y

2. Collect like terms

  • -2x+6y+15+1+y  
  • -2x+7y+15+1
  • -2x+7y+16

3. Solution, -2x+7y+16

5 0
3 years ago
Sanjay graphs a quadratic function that has x-intercepts of –3 and 7. Which functions could he have graphed? Check all that appl
Alchen [17]

Answer:

  • g(x) = x^2 – 4x – 21
  • g(x) = 3x^2 – 12x – 63
  • g(x) = –(x + 3)(x – 7)

Step-by-step explanation:

When r is an x-intercept of the function, (x -r) is a factor. The two given x-intercepts mean that two factors of the function are (x -(-3))(x -7). There may be a vertical scale factor that is not necessarily positive.

These factors multiply out to give ...

  (x +3)(x -7) = x^2 -4x -21 . . . . . . matches the first choice

When this expression is multiplied by 3, it matches the third choice:

  3(x +3)(x -7) = 3x^2 -12x -63

When the factored form is multiplied by -1, it matches the fourth choice:

  -(x +3)(x -7)

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3 years ago
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The measure of one angle of a right triangle is 38∘ more than the measure of the smallest angle. Find the measures of all three
Semmy [17]

Answer:

57

Step-by-step explanation:

the smallest angle

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4 years ago
Use algebra to write an expression for each of the following without using the multiplication sign or the division sign. 3 more
nika2105 [10]

Step-by-step explanation:

3 more than the value of x

x+3

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