def stdDev(arr):
    # Print your answers to 1 decimal place within this function
    s = sum(arr)
    l = len(arr)
    mean = s/l
    
    a=[]
    
    for i in range(l):
        ans = abs(arr[i]-mean)
        new_ans = ans*ans
        a.append(new_ans)
    
    new_sum = sum(a)
    standard = new_sum / l
    answer = math.sqrt(standard)
    print(f"{answer:.1f}")

function stdDev(arr) {
    const sum = arr.reduce((acc, cur) => acc + cur, 0);
    const mean = sum / arr.length;
    console.log(Math.sqrt([...arr].reduce((acc, curr) => acc + Math.pow(curr - mean, 2), 0) / arr.length).toFixed(1))
}

def stdDev(arr):
    m=sum(arr)/len(arr)
    l=[(arr[i]-m)**2 for i in range(len(arr))]
    print(round((sum(l)/len(arr))**0.5,1))

def stdDev(arr):
    m=statistics.mean(arr)
    l=[]
    for i in arr:
        l.append((i-m)**2)
    print((statistics.mean(l))**0.5)

#python
def stdDev(arr):
    s=0
    for x in arr:
        s=s+(x-sum(arr)/len(arr))**2
    print(round((s/len(arr))**.5, 1))