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xxTIMURxx [149]
3 years ago
14

When constructing a Confidence Interval for the population mean and both the sample standard deviation and the population standa

rd deviation are known, which of the following should be used?
(A) normal distribution using the sample standard deviation
(B) normal distribution using the population standard deviation
(C) student-t distribution using the population standard deviation
(D) student-t distributuion using the sample standard deviation
Mathematics
1 answer:
Bingel [31]3 years ago
6 0

Answer: idk

Step-by-step explanation:

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Item 19 The staircase has three parallelogram-shaped panels that are the same size. The horizontal distance between each panel i
Vedmedyk [2.9K]

Answer:

Area = 287\ in^2

Step-by-step explanation:

Given

Length = 20.5

Space = 4.25

Panels = 3

See attachment

Required

The area of one panel

From the attachment, the total width is 50.5in.

i.e.

Total\ Width = 50.5

Given that there are 2 spaces between the 3 panels and each space has a length of 4.25 in.

The reduced width is:

Reduced\ Width = 50.5 - 2 * 4.25

Reduced\ Width = 42

At this point, we can calculate the width of one panel by dividing the reduced width by the number of panels (3).

Width = \frac{42}{3}

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4 0
3 years ago
Is -8.3 a rational number? if so can you provide it in a/b form
zalisa [80]

Answer:

yes-8.3=\frac{-83}{10}\\is ~of ~the ~form ~\frac{a}{b}  ~where ~a=-83, ~b=10

Step-by-step explanation:

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Which inequality is true?
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