Subtracting 25 from every measurement shifts the distribution of measurement lower, so it will affect measures of center like the mean.

**Subtracting 25 from every measurement will decrease the mean by 25.**

Subtracting 25 from every measurement doesn't affect measures of spread since the distribution is just shifted lower.

**Subtracting 25 from every measurement won't affect the standard deviation.**

**Mean: ****175 g**

**Standard deviation: 70 g.**

**.**

I found an answer from www.khanacademy.org

Normal **distribution** problem: z-scores (from ck12.org) (video) | Khan ...

Effects of linear **transformations**. Sort by: Top Voted ... Other **distributions** include
the gamma **distribution**, the Poisson **distribution** and the Bernoulli **distribution**. ...
You shouldn't be getting the **standard deviation** or the **mean** from a Z-table. ... I
understand how to get a z-score but what if you **have** many **data** sets for your
value.

For more information, see Normal **distribution** problem: z-scores (from ck12.org) (video) | Khan ...