Part 1 of 2
$\mathrm{Po}$
Subtract 20 from each item in the given sample, and compute the mean and standard deviation of the new sample.
\[
50,25,34,43,34,30,44
\]

The mean of the new sample is $\square$.
(Simplify your answer. Type an integer or decimal rounded to the nearest hundredth as needed.)

Step 1 ：Given the sample [50, 25, 34, 43, 34, 30, 44], subtract 20 from each item to get the new sample [30, 5, 14, 23, 14, 10, 24].

Step 2 ：To find the mean of the new sample, sum all the numbers in the sample and then divide by the count of numbers in the sample.

Step 3 ：The sum of the numbers in the new sample is \(30 + 5 + 14 + 23 + 14 + 10 + 24 = 120\).

Step 4 ：The count of numbers in the new sample is 7.

Step 5 ：So, the mean of the new sample is \( \frac{120}{7} = 17.142857142857142 \).

Step 6 ：Rounding to the nearest hundredth, the mean of the new sample is 17.14.

Step 7 ：Final Answer: The mean of the new sample is \( \boxed{17.14} \).