(a) give the mean and the standard deviation of the sampling distribution of the sample mean x. mean 105 correct: your answer is correct. standard deviation 2.4 correct: your answer is correct. (b) find the probability that x exceeds 112. (round your answer to four decimal places.)

(a) is already answered.

(b) The random variable X is normally distributed with mean μ=105 and standard deviation σ =2.4. Use the transformation for calculating the probability. This value is called Z-score.

The Z score is .

Refer to the standard normal distribution table.

The probability

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.

-1/2 +2

step-by-step explanation: