A group of adult males has foot lengths with a mean of 28.36 cm and a standard deviation of 1.34 cm . Use the range rule of thumb for identifying significant values significantly low or significantly high. Is the adult male foot length of 25.2 cm significantly low or significantly high? Explain. Significantly low values are 25.68 cm or lower. (Type an integer or a decimal. Do not round.) Significantly high values are \( \square \mathrm{cm} \) or higher. (Type an integer or a decimal. Do not round.)

To determine the **significantly high** foot length using the range rule of thumb, follow these steps: 1. **Calculate the Threshold for Significantly High Values:** \[ \text{Significantly High} = \text{Mean} + 2 \times \text{Standard Deviation} \] \[ \text{Significantly High} = 28.36\, \text{cm} + 2 \times 1.34\, \text{cm} = 28.36\, \text{cm} + 2.68\, \text{cm} = 31.04\, \text{cm} \] 2. **Interpretation:** - **Significantly Low Values:** 25.68 cm or lower. - **Significantly High Values:** **31.04 cm** or higher. 3. **Assessing 25.2 cm:** Since 25.2 cm is **lower** than 25.68 cm, it is considered a **significantly low** foot length. **Final Answer:** Significantly high values are **31.04** cm or higher.