20. 35 students in a statistics class recently took a test over numerical data. On the test, the class had an average of a 78 and a standard deviation of 5. Assuming the data was normally distributed.
a. How many students scored below one standard deviation from the mean? (Hint: When you round, you cannot round up on the amount of people. Therefore,
you will need to round down to the nearest whole number for your answer)
b. What was the test score for the upper 24h percent? (Round to two decimal places)
Show your work.

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

How many grams the dog will eat in 3 days?