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Alenkasestr [34]
3 years ago
6

In an experiment focused on meditation and anxiety, participants are assigned to either meditate for 5 minutes or sit in silence

for 5 minutes by the flip of a coin (heads they are assigned to meditate; tails they are assigned to sit in silence). After the 5-minute period, they complete a short anxiety-symptoms questionnaire and their results are scored. What is the dependent variable in this study
Mathematics
1 answer:
TiliK225 [7]3 years ago
8 0

Answer:

The results of the short anxiety-symptoms questionnaire

Step-by-step explanation:

The results of the anxiety questionnaire are expected to depend on the  independent variable chosen being the metdod of waiting the 5 miniute which is being directly ccontrolled by the researchers.

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2/6 + 1/3 =<br><br> _ / _ + _ / _ = _ / _ = _ / _
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Step-by-step explanation:

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Find the area of a circle in terms of pi with a radius of 7.4 cm.
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The probability that a student has a Visa card (event V) is .63. The probability that a student has a MasterCard (event M) is .1
Aleksandr-060686 [28]

Answer:

a)  The probability that a student has either a Visa card or a MasterCard is 0.71.  

b) V and M are not independent.

Step-by-step explanation:

Given : The probability that a student has a Visa card (event V) is 0.63. The probability that a student has a MasterCard (event M) is 0.11. The probability that a student has both cards is 0.03.

To find :

a) The probability that a student has either a Visa card or a MasterCard ?

b)  In this problem, are V and M independent ?

Solution :

The probability that a student has a visa card(event V) is P(V)= 0.63

The probability that a student has a MasterCard (event M) is P(M)= 0.11

The probability that a student has both cards  is P(V \cap M)=0.03

a) Probability that a student has either a Visa card or a Master Card is given by,

P(V \cup M) = P(V) + P(M) - P(V\cap M)

P(V \cup M) = 0.63+ 0.11- 0.03

P(V \cup M) =0.74- 0.03

P(V \cup M) =0.71

The probability that a student has either a Visa card or a MasterCard is 0.71.

b) Two events, A and B, are independent if P(A\cap B)=P(A)P(B)

For V and M to be independent the condition is satisfied,

P(V\cap M)=P(V)P(M)

Substitute the values,

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0.03\neq 0.0693

So, V and M are not independent.

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