he length of life -f brand X light bulbs is assumed to be N(M,> 784)• The length of life of brand Y light bulbs is assumed to be N(alys 627) and independeat of that of x •If a rs. of n, =56 brand X ight bulbs Yielded a mean of =937.4 hours and a r.s. of size Rq=57 brandY light bulbs yielded a mean f y-988•9 hourse Find a 90 % Confidence interval for My-My .
he length of life -f brand X light bulbs is assumed to be N(M,> 784)• The length of life of brand Y light bulbs is assumed to be N(alys 627) and independeat of that of x •If a rs. of n, =56 brand X ight bulbs Yielded a mean of =937.4 hours and a r.s. of size Rq=57 brandY light bulbs yielded a mean f y-988•9 hourse Find a 90 % Confidence interval for My-My .
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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Transcribed Image Text:The length of life of brand Y light bulbs
he length of life of brand x
light bulbs is assumed to be N(My> 784).
is assumed to be N (aMys 627) and independeat
of that of x •If a rs. of n, -56 brand X
light bulbs Yielded a mean of =937.4
hours and a r.s. of size nq =57 brandY
light bulbs yielded a mean of ỹ- 988.9
a 90% Confidence interval
My-My •
%3D
hoursa Find
for
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