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1) A man is given n keys, in random order of which only one will unlock his door. He tries them one by one (without replacement). find P(man succeeds on k*th trial)
the data show the number of games played each year by sammy. determine if the data are approximately normally distributed.
81, 148, 152, 135, 151, 152, 159, 142,34,162, 130, 162,163,143,67,112,70
let N be a positive integer and let f(x)=c2^x, x =1,2,....n
=0 elsewhere
find the value of c such that f(x) is a probability function
the ff. stem and leaf plot shows the lifetime in hours of 15 long life light bulbs and 15 ever bright light bulbs
long life ever bright
71
72 5
6 3 1 0 73 1
9 9 8 7 6 2 74 6
9 7 3 0 75 2
76 0 2 2 5 7
77 1 1 3 4 6 8
1 78
79
1. represent this information on a box plot
2. give a good reason why someone might prefer a long life light bulb give supporting details
3. give a good reason why someone might prefer an ever bright light bulb give supporting details
6 3 1 0
9 9 8 7 6 2
9 7 3 0
1 71
72
73
74
75
76
77
78
79
5
1
6
2
0 2 2 5 7
1 1 3 4 6 8
Represent this information on box plot
Pages: 1