js: Get mean & mode

mean_mode.js

const statsFinder = (array) => {
    const total = array.reduce((nextitem, previtem) => (nextitem + previtem),0);
    const mean = total / array.length;
    const getMode = (array) => {
        const modeObject = {};        
        array.forEach(number => {
            modeObject[number] = (!modeObject[number]) ? 1 : modeObject[number]+1;
        });
        return +Object.keys(modeObject).reduce((a, b) => modeObject[a] > modeObject[b] ? a : b);
    }
    const mode = getMode(array);
    return [mean, mode];
}
statsFinder([500, 400, 400, 375, 300, 350, 325, 300])