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Rolling Sevens and other questions

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What is the probability to roll 2 sevens with 2 dice on two consecutive rolls?

Note: to roll a 7, you need 2 dice and will roll 2 dice 2 times to get 2 sevens.
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Going fishing in a lake with bass weighing an average of 3 pounds with a standard deviation of 0.3 pounds

2 fish caught. What is the probability that both catches were 3.5 pounds or heavier?

4 fish caught with 2 of them in the lowest 20% of the weight distribution. Other 2 were in the top 10% of weight distribution. Estimate the total weight of the 4 fish = _________
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What is the sample standard deviation and the variance?

Sample and observations:

1,1,3,4,4,4,6,7,9,12,14,22,33,44,13,15

What is the five number summary for this sample?

Is this sample symmetrical or skewered?

Place this sample in a frequency distribution and find the sample mean and sample mode from the frequency distribution.
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