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3 years ago

Find the critical value zα/2 that corresponds to a 98% confidence level.

1 answer:

4 0

A critical value is the point on the scale of the test statistic (z test in this case) outside which we reject the null hypothesis, and is taken from the level of significance of the test. The critical values can be obtained from the standard distribution tables for z and for this case, it is equivalent to:

critical value zα/2 at 98% confidence level = 2.326

Answer: 2.326

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If A and B are independent events, P(A and B) =

Sergio039 [100]

Answer:

If A and B are independent events, P(A and B) = P (A) * P (B)

Step-by-step explanation:

Let's recall that independent events means that when one event occurs, it has no impact or influence on the probability of another event occurring. Here’s an example. Let’s say that we have two events, A and B.

Event A : it rains in Seattle

Event B : the Super Bowl match is cancelled in Miami

The two events are independent; if it rains in Seattle, this will have no impact on the probability that the Super Bowl match is cancelled in Miami. Raining in Seattle and the cancellation of the Super Bowl are independent events, therefore:

P(A and B) = P (A) * P (B)

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3 years ago

How many lines of symmetry does this shape have? Information Answer options with 5 options A. 0 B. 1 C. 2 D. 3 E. 4

Darina [25.2K]

Answer:

D.3? you never showed us the picture

Step-by-step explanation:

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2 years ago

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Find the number of faces on this solid.

snow_lady [41]

Answer:

5 faces

Step-by-step explanation:

4 triangle faces + 1 square base face = 5 faces in total

7 0

3 years ago

Read 2 more answers

someone please answer this but no links because i have a school computer and it blocks the links so please dont send links

Otrada [13]

Answer:

just typed the whole in mathaway.com

Step-by-step explanation:

it's a better app for quadratic equation and you can use it on a school computer

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3 years ago

Please Answer Quick 70 Points !

Kipish [7]

Answer:

The ordered pair (7, 19) is a solution to the first equation because it makes the first equation true

The ordered pair (7, 19) is not a solution to the system because it makes at least one of the equations false

Step-by-step explanation:

we have

$2x-y=-5$ -----> First equation

$x+3y=22$ -----> Second equation

Solve the system of equations by graphing

Remember that the solution of the system is the intersection point both graphs

The solution is the point (1,7)

The ordered pair (7,19) lie on the first line, so is a solution of the first equation

see the attached figure

Verify each statement

case 1) The ordered pair (7, 19) is a solution to the first equation because it makes the first equation true

The statement is true

case 2) The ordered pair (7, 19) is a solution to the second equation because it makes the second equation true

The statement is false, because the ordered pair (7,19) not lie on the second line

case 3) The ordered pair (7, 19) is not a solution to the system because it makes at least one of the equations false

The statement is true

case 4) The ordered pair (7, 19) is a solution to the system because it makes both equations true

The statement is false,because it makes only the first equation true

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3 years ago