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QUESTION
a firm's management thinks, sales have increased now average over 50 per month 1) the distribution is known to be normal 2) = 10 is known 3) N= 49 4)...
a firm's management thinks, sales have increased now average over £50 per month
1) the distribution is known to be normal
2) σ = 10 is known
3) N= 49
4) sample mean= 53.1
Test claim at the 10% significance (alpha = .10)(α=.10)
