Grandpa ernie is shrinking! over the past 444 years, his height decreased by a total of 2.4 \text{ cm}2.4 cm2, point, 4, space, c, m. it decreased by the same amount each year. what was the change in grandpa ernie's height each year?

Astudy claims that the mean age of online dating service users is 40 years. some researchers think this is not accurate and want to show that the mean age is not 40 years. identify the null hypothesis, h0, and the alternative hypothesis, ha, in terms of the parameter μ. select the correct answer below: h0: μ≥40; ha: μ< 40 h0: μ≤40; ha: μ> 40 h0: μ≠40; ha: μ=40 h0: μ=40; ha: μ≠40