It doesn't mean that the higher the university's ranking is that the better their education will be.
It does not necessarily mean that the price of the car reflects its actual efficiency.
ご質問ありがとうございます。
① "It doesn't mean that"=「それは~という意味にはならない」
"the higher the university's ranking is"=「大学のレベルが高ければ高いほど」
"that the better their education will be."=「(この大学の)教育が良いということに。」
② "It does not necessarily mean that"=「必ずしも~だとは限らない」
"the price of the car reflects its actual efficiency."=「車の価格がその実用性を反映しているとは。」
ご参考に。