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Complete the Week 4 Practice Set problems.
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Practice Set 4
that σ = 4.8.
a.The null hypothesis is a claim about a population parameter that is assumed to be false until it is declared false.
n1 = 18 x1 = 7.82 σ1 = 2.35
n2 =15 x2 =5.99 σ2 =3.17
Round to two decimal places.
n1 =650 x1 =1.05 σ1 =5.22
n2 =675 x2 =1.54 σ2 =6.80
Test at a 5% significance level if μ1 is less than μ2.