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katen-ka-za [31]
2 years ago
10

Susan Sound predicts that students will learn most effectively with a constant background sound, as opposed to an unpredictable

sound or no sound at all. She randomly divides twenty-four students into three groups of eight. All students study a passage of text for 30 minutes. Those in group 1 study with background sound at a constant volume in the background. Those in group 2 study with noise that changes volume periodically. Those in group 3 study with no sound at all. After studying, all students take a 10-point multiple choice test over the material. Their scores follow: Table Constant sound Random Sound No Sound 7 5 2 4 5 4 6 3 7 8 4 1 6 4 2 6 7 1 2 2 5 9 2 5 1. State the type of statistical test that you will use to conduct your hypothesis test.
Mathematics
1 answer:
alukav5142 [94]2 years ago
8 0

Answer:

An ANOVA test

Step-by-step explanation:

You will use the ANOVA test, which is a test that compares the means of more than 2 samples.  Since the teacher used 3 test groups, she would have to use this test if she wanted to do a hypothesis test to determine if the means are equal.  

*This test only tells us if the means are equal, it won't say which is greater than the other.  You would have to do 3 individual hypothesis tests comparing 2 means at a time in order to determine that.

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Two kilograms of ground cinnamon is packaged into bags containing 38 g each. There will also be some cinnamon left over. How man
Troyanec [42]
I think about 52 bags
2 kilometers = 2,000 grams
2, 000/ 38 = 52. repeated decimal(which would be the amount leftover)
I believe the answer would be 52 bags.

5 0
2 years ago
Read 2 more answers
You and your neighbor attempt to use your cordless phones at the same time. Your phones independently select one of ten channels
ExtremeBDS [4]

Answer:

1/100.

Step-by-step explanation:

So, we can make the following deductions from the information given in the question or problem above.

[1]. "You and your neighbor attempt to use your cordless phones at the same time."

DEDUCTION: Two people are involved, that is you and your neighbor are both involved.

[2]. "Your phones independently select one of ten channels at random to connect to the base unit. "

DEDUCTION: Both cordless phones can choose one channels each which is random. The number of channels available is ten.

Therefore, the probability that both your phone and your neighbor phone pick the same channel can be calculated or determined as follows:

The probability that both your phone and your neighbor phone pick the same channel = probability that both your phone will pick one channel out of the ten channels ×  the probability that your neighbor phone pick one channel out of the ten channels.

The probability that both your phone and your neighbor phone pick the same channel = 1/10 × 1/10 = 1/100.

Therefore, The probability that both your phone and your neighbor phone pick the same channel = 1/100.

8 0
2 years ago
The Sweet water High School Project Graduation committee is hosting a dinner-and-dance fundraiser at the Sweet water Community C
yan [13]

Answer:

<h2> 105 tickets</h2>

Step-by-step explanation:

To solve this problem we need to model an equation to represent the situation first.

the goal is to archive $7500 in the even, bearing in mind that there is a cost of $375 fee for rent, we need to put this amount into consideration

let the number of tickets be x

so

75x-375>=7500--------1

Equation 1 above is a good model for the equation

we can now solve for x to determine the number of tickets to be sold to archive the aim

75x-375>=7500--------1

75x>=7500+375

75x>=7875

divide both sides by 75 we have

x>=7875/75

x>=105 tickets

so they must sell a total of 105 tickets and above to meet the target of $7500 with the rent inclusive

4 0
2 years ago
Read 2 more answers
Simplify the expression
Jet001 [13]

Answer: C

Step-by-step explanation:

48/64=3/4

a^(4-2)x b^(3-2)x c^(1-2)=a^2xb/c

4 0
2 years ago
Cones A and B both have volume cubic 48π units, but have different dimensions. Cone A has radius 6 units and height 4 units. Fin
kogti [31]

Answer:

r = 2 units

h= 36 units

Step-by-step explanation:

Given That:

Cones A and B both have volume cubic 48π units

The volume of a cone = \frac{1}{3} \pi r^2h

So for cone A

V_A = \frac{1}{3} \pi r_A^2 h_A

Volume for cone B

V_B = \frac{1}{3} \pi r_B^2 h_B

Due to different dimensions;

Cone A has

radius = 6 units

height = 4 units

To determine the one possible radius and height for cone B;

we have

\frac{1}{3} \pi r_A^2 h_A =\frac{1}{3} \pi r_B^2 h_B

\frac{1}{3} \pi (6)^2 (4) =\frac{1}{3} \pi r_B^2 h_B

150.9=\frac{1}{3} \pi r_B^2 h_B

150.9=1.047r_B^2 h_B

r_B^2 h_B=144.12

r_B^2 h_B=144

Therefore; the only possible way for this equation is :

r_B = (2)\\h_B = 36

If we are to check: we will realize that;

r_B^2h_B = (2)^2*36 =144

Therefore, the possible radius for the cone B = 2 units and height = 36 units. Hence from the question, we are told they both have the same volume of 48 π units.

7 0
2 years ago
Read 2 more answers
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