Question

I did 14a already. How do I do 14b? y = 0.167x - 0.467

Answer 1

T probability of rolling doubles after 45 tosses is 0.156

How to determine the regression equation?

To do this, we enter the data values in a graphing calculator.

From graphing calculator, we have the following summary:

• Sum of X = 550
• Sum of Y = 87
• Mean X = 55
• Mean Y = 8.7
• Sum of squares (SSX) = 8250
• Sum of products (SP) = 1375

The regression equation is

y = bx + a

Where

b = SP/SSX = 1375/8250 = 0.16667

a = MY - bMX = 8.7 - (0.17*55) = -0.46667

So, we have:

y = 0.16667x - 0.46667

Approximate

y = 0.167x - 0.467

When the number of tosses is 45, we have:

y = 0.167 * 45 - 0.467

Evaluate

y = 7.048

Approximate

y = 7

45 tosses gives 7 doubles.

So, the probability is:

P = 7/45

Evaluate

P = 0.156

Hence, the probability of rolling doubles after 45 tosses is 0.156

Read more about regression equation at:

brainly.com/question/14184702

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