Question

on tuesday, chann tests code quest with a different group of players. the dot - plot shows the time it takes them to complete the puzzle. what is the mean of the times? mean = minutes an error has occurred. please enter a number. code quest: tuesdays test time (min)

Explanation:

1 at 11, 1 at 12, 1 at 13, 1 at 14, 1 at 15, 1 at 16, 1 at 17, 1 at 18, 1 at 19, 1 at 20, 3 at 21, 2 at 22.

Step2: Calculate sum of products

\[ (9\times2)+(10\times1)+(11\times1)+(12\times1)+(13\times1)+(14\times1)+(15\times1)+(16\times1)+(17\times1)+(18\times1)+(19\times1)+(20\times1)+(21\times3)+(22\times2)=18 + 10+11+12+13+14+15+16+17+18+19+20+63+44 = 280\]

Step3: Calculate total number of data - points

\[2 + 1+1+1+1+1+1+1+1+1+1+1+3+2=19 + 1=20\]

Step4: Calculate the mean

The mean \(\bar{x}=\frac{280}{20}=14\)

Answer:

1 at 11, 1 at 12, 1 at 13, 1 at 14, 1 at 15, 1 at 16, 1 at 17, 1 at 18, 1 at 19, 1 at 20, 3 at 21, 2 at 22.

Step2: Calculate sum of products

\[ (9\times2)+(10\times1)+(11\times1)+(12\times1)+(13\times1)+(14\times1)+(15\times1)+(16\times1)+(17\times1)+(18\times1)+(19\times1)+(20\times1)+(21\times3)+(22\times2)=18 + 10+11+12+13+14+15+16+17+18+19+20+63+44 = 280\]

Step3: Calculate total number of data - points

\[2 + 1+1+1+1+1+1+1+1+1+1+1+3+2=19 + 1=20\]

Step4: Calculate the mean

The mean \(\bar{x}=\frac{280}{20}=14\)