Which of the following is the most common and important measure of dispersion in statistics, used to quantify the amount of variation or spread in a set of data?

During the first quarter of 2017, an investment group’s average purchase price of Bitcoin was $2,500.175 with a standard deviation of $600. Assume that the purchase prices follow a normal distribution. Approximately 75% of Bitcoin purchases were less than what price? Select the appriopriate Excel function for this problem. 

Which of the following is a key difference in how probabilities are calculated for discrete vs. continuous random variables?

According to a customer’s crypto transaction records, 15% of their transactions are Bitcoin sells. If a random sample of 20 transactions was selected, what is the probability that 8 of these transactions are Bitcoin sells? Select the appropriate Excel function used to find the probability.  General syntax: BINOM.DIST(number_s, trials, probability_s, cumulative)

What structure is labeled #6 in the ultrasound image? pancreas

Which of the following does not accurately reflect the normal size of the pancreas? (Select all that apply)

Which of the following statements about annular pancreas is TRUE?

Which of the following is not a sonographic landmark of the gallbladder?

After a cholecystectomy, where does bile flow?

If the gallbladder appears contracted despite fasting, which imaging modality should be used next?