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vladimir1956 [14]
3 years ago
13

I need help I will give brainliest

Mathematics
2 answers:
ANEK [815]3 years ago
6 0

Answer:

Option 2

Step-by-step explanation:

Klio2033 [76]3 years ago
4 0

Answer:

4.4 × 10 ^− 6

Step-by-step explanation:

Brainliest please :)?

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Step-by-step explanation:

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What is the factored form of a2 – 121?
Elina [12.6K]
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5 0
4 years ago
A random sample of 12 students used Method A, and their increase in points averaged 46.31, with a sample standard deviation of 6
Kitty [74]

Answer:

The null hypothesis is   H_o  :  \mu_A  - \mu_B  =  0

The alternative hypothesis is  H_a :  \mu_A - \mu_B > 3  

Step-by-step explanation:

From the question we are told that

  The mean of method A is \mu_A =  46.31

  The standard deviation of method A is  \sigma  = 6.44

   The  mean of method B is  \mu_B   =  42.79

   The standard deviation of  method B  is  \sigma_B  =  7.52

An appropriate set of null and alternative hypothesis to determine whether Method A increases students points by more than 3 points is

The null hypothesis is   H_o  :  \mu_A  - \mu_B  =  0

The alternative hypothesis is  H_a :  \mu_A - \mu_B > 3  

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3 years ago
What is the value of the expression?
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B use the app Photomath it helps you with this kinda questions
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