Answer:
Method A.
Step-by-step explanation:
For solving this question we need to find out the z-scores for both methods,
Since, the z-score formula is,

Where,
is mean,
is standard deviation,
Given,
For method A,


Thus, the z score for 34 is,

While, for method B,


Thus, the z score for 34 is,
,
Since, 
Hence, method A is preferred if the procedure must be completed within 34 minutes.
Answer:
- Mean = 16.9
- Mode = 18
- Median = 17.5
Step-by-step explanation:
<u>Given data:</u>
- 18, 19, 16, 18, 14, 17, 18, 15
<u>The data in the ascending order:</u>
- 14, 15, 16, 17, 18, 18, 18, 19
<u>The mean:</u>
- (14 + 15 + 16 + 17 + 18*3 + 19)/8 = 16.9 (rounded)
<u>The median:</u>
- (17 + 18)/2 = 17.5 (the average of middle terms)
<u>The mode:</u>
- 18 (the most repeated number)
Answer:
One and Four
Step-by-step explanation:
Answer:
3 1/2 hours
Step-by-step explanation:
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