Does Jupiter have a gravitational effect on Earth?

Yes. If it's within a roughly 13.7 billion light year radius of us, it has a gravitational effect on us, and we have a gravitational effect on it. Of course, the magnitude of that effect is based on mass and distance.

A very slight one, but yes. As we approach Jupiter, it accelerates our planet, as we cruise past it, the same effect slows us just a bit. But, compared to the sun - Jupiter's effect is very slight.

A very small one because it is so far away. It's a very slight effect compared to the sun, moon and Venus.

Jupiter has an acceleration on Earth in the range 1.35[-7] and 3.56[-7] m/s² compared to the Sun's 5.90[-3] m/s².

Yes, but it is a very small effect. The sun, moon, and Venus have more effect than Jupiter.

No

Its too too far away to have the slightest effect on earth, even though its humangous

it most certainly does. matter of fact the solar system wouldn't be the same without it.