The following table shows the results of a survey of 200 authors by a publishing company. New Authors Established Authors Total Successful 20 54 74 Unsuccessful 40 86 126 Total 60 140 200 Compute the relative frequency of the given event if an author as specified is chosen at random. An author is a new author

Among fatal plane crashes that occurred during the past 70 ​years, 332 were due to pilot​ error, 63 were due to other human​ error, 265 were due to​ weather, 290 were due to mechanical​ problems, and 478 were due to sabotage.      Construct the relative frequency distribution. What is the most serious threat to aviation​ safety, and can anything be done about​ it? Complete the relative frequency distribution below.   Cause Relative Frequency Pilot error nothing​% Other human error nothing​% Weather nothing​% Mechanical problems nothing​% Sabotage nothing​% ​(Round to one decimal place as​ needed.) What is the most serious threat to aviation​ safety, and can anything be done about​ it?     A. Weather is the most serious threat to aviation safety. Weather monitoring systems could be improved.   B. Mechanical problems are the most serious threat to aviation safety. New planes could be better engineered.   C.…

The following table shows the results of 20 random Full Sail college students when asked the number of hours spent daily on their laptops. Complete a grouped frequency distribution for the data, with a class width of 4. Which frequency distribution, if any, is correct?

Assume that 900 births are randomly selected and 443 of the births are girls. Use subjective judgment to describe the number of girls as significantly​ high, significantly​ low, or neither significantly low nor significantly high.