(probability) Getting a sum of either 5 or 9 on a roll of two dice
1 answer:
Answer:
2/9
Step-by-step explanation:
From the image, the total number of outcomes when two die are rolled = 36
It can also be seen that a sum of 5 can be got 4 times and a sum of 9 can be got 4 times too
Therefore, the probability of getting a sum of 5 = 4/36
Probability of getting a sum of 9 = 4/36
The probability of getting either a sum of 5 or 9 gives;
4/36 + 4/36
= 2/9
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Answer:
The correct option is 1.148 < σ < 6.015
Explanation:
The 99% confidence interval for the standard deviation is given below:
Where:
Therefore, the 99% confidence interval is:
Therefore, the option 1.148 < σ < 6.015 is correct