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iogann1982 [59]
3 years ago
11

A supervisor records the repair cost for 17 randomly selected VCRs. A sample mean of $68.83 and standard deviation of $12.17 are

subsequently computed. Determine the 80% confidence interval for the mean repair cost for the VCRs. Assume the population is approximately normal.
Step 1 of 2: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
Mathematics
1 answer:
amid [387]3 years ago
5 0

Answer:

27

Step-by-step explanation:

im smart

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Only the coefficients change, not the exponents when adding
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Answer: the answer is  4

5 0
3 years ago
Read 2 more answers
I need to figure this out in simplest form but I’m stuck
Arte-miy333 [17]

Answer:

z ≥ 2

Step-by-step explanation:

Step 1: Write inequality

-7z - (-5z - 4) ≤ -3z - 2 + 4z

Step 2: Solve for <em>z</em>

  1. Distribute negative: -7z + 5z + 4 ≤ -3z - 2 + 4z
  2. Combine like terms: -2z + 4 ≤ z - 2
  3. Add 2z to both sides: 4 ≤ 3z - 2
  4. Add 2 to both sides: 6 ≤ 3z
  5. Divide both sides by 3: 2 ≤ z
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8 0
4 years ago
Determine the equation of a line that passes through A(2,5) and is parallel to the line defined by 3x−y+12=0. State the equation
Ksju [112]

Answer:

y = 3x - 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Given

3x - y + 12 = 0 ( subtract 3x + 12 from both sides )

- y = - 3x - 12 ( multiply through by - 1 )

y = 3x + 12 ← in slope- intercept form

with slope m = 3

Parallel lines have equal slopes , thus

y = 3x + c ← is the partial equation

To find c substitute (2, 5) into the partial equation

5 = 6 + c ⇒ c = 5 - 6 = - 1

y = 3x - 1 ← equation of parallel line

6 0
3 years ago
Pls help me thank you
Akimi4 [234]

Answer:

top row: 80, 160, 240, 320, 400, 800

bottom row: 4, 8, 12, 16, 20, 40

Step-by-step explanation:

5 0
3 years ago
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