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3 years ago

Martha rolls a 6 sided number cube two times.

Mathematics

1 answer:

oee [108]3 years ago

6 0

Answer:

25% chance

Step-by-step explanation:

There are 3 prime numbers on a 6-sided die so that means there is a 1/2 chance you roll a prime number. In order to calculate the probability of 2 or more events you multiply their probability which would be

1/2 * 1/2 = 1/4

So the chance of rolling a prime number on both rolls is a 1/4 chance or a 25% chance

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3 years ago

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3 years ago

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4 years ago

Given that the sum of squares for error is 60 and the sum of squares for regression is 140, then the coefficient of determinatio

Anastasy [175]

Answer:

Step-by-step explanation:

The coefficient of determination which is also known as the R² value is expressed as shown;

$R^{2} = \frac{sum\ of \ squares \ of \ regression}{sum\ of \ squares \ of total}$

Sum of square of total (SST)= sum of square of error (SSE )+ sum of square of regression (SSR)

Given SSE = 60 and SSR = 140

SST = 60 + 140

SST = 200

Since R² = SSR/SST

R² = 140/200

R² = 0.7

Hence, the coefficient of determination is 0.7. Note that the coefficient of determination always lies between 0 and 1.

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