8.4y−3.6y=48.96 i need help
1 answer:
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Answer:
a)
b)
Step-by-step explanation:
We have to build appropriate null and alternate hypothesis for the given scenarios.
a) Population mean, μ = $62,500 per year
The market research wants to find whether the mean household income of mall shoppers is higher than that of the general population.
We would use one-tail(right) test to perform this hypothesis.
b) Population mean, μ = 2.6 hours
The company want to know the average time to respond to trouble calls is different or not.
We would use two-tail test to perform this hypothesis.
Answer:
no solution
Step-by-step explanation:
Given the 2 equations
y = x + 4 → (1)
- x + y = - 5 → (2)
Substitute y = x + 4 into (2)
- x +
x + 4 = - 5 , that is
4 = - 5 ← not possible
This indicates the system has no solution