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Veseljchak [2.6K]

3 years ago

5

In a survey, 31 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped

with a mean of $49 and standard deviation of $8. Find the margin of error at a 80% confidence level. Give your answer to two decimal places.

1 answer:

Andrei [34K]3 years ago

7 0

Answer:

Step-by-step explanation:

i would help you but i dont know , sorry

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How to tell when to use positive or negative symbols when dividing?

katen-ka-za [31]

Always look to the left of the number if there's a minus sign then it's negative. If it has nothing or a plus sign, then it is positive.

8 0

3 years ago

There is a bag filled with 2 blue, 4 red and 3 green marbles.

Lyrx [107]

Answer:

.753

Step-by-step explanation:

Let Ps = probability both marbles are the same color.

Let Pd = probability both marbles are a different color.

Pd = 1 -Ps

Let Pb = probability both marbles are blue

Let Pr = probability both marbles are red.

Let Pg = probability both marbles are green

Pb= 2/9 * 1/9 = 2/81

Pr= 4/9 * 3/9 = 12/81

Pg=.3/9 * 2/9= 6/81

Ps = Pb + Pr +Pg= 20/81

Pd =1-Ps= 61/81 = .753

Is this correct?

7 0

2 years ago

Simon draws a rectangle with two sides that are 2 inches long and two sides that are 3 inches long.Chaz draws a figure with the

7nadin3 [17]

The other shape might be a trapezoid.

3 0

3 years ago

Graph the function y = __ 2x

katen-ka-za [31]

Answer:

Well, if <em>y </em>is 1

Then the equation would be y = 1 (2x)

So, depending on the answer options. Y would be double of whatever the X value is.

See how 1 X value is worth 2 Y?

Example Attached

6 0

2 years ago

In your notebook, set up the following addition using a vertical format and find the sum of the given polynomials.

Tasya [4]

The Correct Answer is "C"

5m^2 - 5mn +4n^2

5 0

2 years ago

Read 2 more answers