A company is preparing a factory to make a new type of washing machine for clothing. Company engineers want to know whether the new machines can be assembled in less than 45 minutes. They decide to test H0:=45{"version":"1.1","math":"H_0:\mu=45"} against Ha:<45{"version":"1.1","math":"H_a:\mu<4 5"} at the 5% significance level. Suppose they reject their null hypothesis. Which of the following sentences best states the conclusion of their hypothesis test?

Question 26 options:

a) There is sufficient evidence to conclude that the machines take less than 45 minutes to assemble.

b) There is insufficient evidence to conclude that the machines take less than 45 minutes to assemble.

c) There is sufficient evidence to conclude that the machines take about 45 minutes to assemble.

d) There is insufficient evidence to conclude that the machines take about 45 minutes to assemble.

e) There is sufficient evidence to conclude that the machines take more than 45 minutes to assemble.

f) There is insufficient evidence to conclude that the machines take more than 45 minutes to assemble