Please answer all of this!!! This is my last question to ask and Its urgent!! 1.
ID: 2907547 • Letter: P
Question
Please answer all of this!!! This is my last question to ask and Its urgent!!
1.Among fatal plane crashes that occurred during 468 were due to pilot error, 74 were due to other human error, 135 were due to weather, 523 were to due to mechanical problems, and 617 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 ___%
Other human error ___%
Weather ___%
Mechanical Problems ___%
Sabotage___%
2 .Fourteen different? second-year medical students at a hospital measured the blood pressure of the same person. The systolic readings? (mm Hg) are listed below. Use the given data to construct a boxplot and identify the? 5-number summary.
127 139 135 127 120 125 129 130 134 132 130 140 135 150
What would the 5-number summary be _,_,_,_,_ all in mm Hg.
3. In a test of the effectiveness of garlic for lowering? cholesterol, 43 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes ?(beforeminus?after) in their levels of LDL cholesterol? (in mg/dL) have a mean of 3.6 and a standard deviation of 15.4. Construct a 90?% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL? cholesterol?
What is the confidence interval estimate of the population mean ???
?_____mg/dL< ?<___?mg/dL
?(Round to two decimal places as? needed.)
Explanation / Answer
Q1 )
The relative frequency distribution table is given below:
The most serious threat to aviation? safety is sabotage
Threat Frequency Rel. Freq Pilot Error 468 =(468/1817)*100 =25.76% Other Human Error 74 =(74/1817)100=4.07% Weather 135 =(135/1817)*100=7.43% Mechanical Problems 523 =(523/1817)*100=28.78% Sabotage 617 =(617/1817)*100=33.96% Total 1817 100%Related Questions
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