The average lifetime of a light bulb is 3,000 hours with a standard deviation of 696 hours. a simple random sample of 36 bulbs is taken.
a. what are the expected value, standard deviation, and shape of the sampling distribution of ?
b. what is the probability that the average life in the sample will be between 2,670.56 and 2,809.76 hours?
c. what is the probability that the average life in the sample will be greater than 3,219.24 hours?
d. what is the probability that the average life in the sample will be less than 3,180.96 hours?

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.