A group of Ecologist are examining the effect speed of prey (twips per second) and length of prey (twips X 100) have on the time (in seconds) required to catch the prey. a.) Calculate and interpret the coefficient of determination. b.) Construct and interpret a 95% confidence interval for the standard deviation of the catch time of prey for any fixed length and speed.

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A group of Ecologist are examining the effect speed of prey (twips per second) and length of prey (twips X 100) have on the time (in seconds) required to catch the prey.

a.) Calculate and interpret the coefficient of determination.

b.) Construct and interpret a 95% confidence interval for the standard deviation of the catch time of prey for any fixed length and speed.

**Analysis of Variance**

The table summarizes the analysis of variance for a model evaluating the influence of certain factors.

- **Source:**
  - **Model:** 
    - Degrees of Freedom (DF): 2
    - Sum of Squares: 0.41321380
    - Mean Square: 0.206607
    - F Ratio: 23.3512
    - Probability > F: <.0001*
  - **Error:**
    - Degrees of Freedom (DF): 16
    - Sum of Squares: 0.14156515
    - Mean Square: 0.008848
  - **C. Total:**
    - Degrees of Freedom (DF): 18
    - Sum of Squares: 0.55477895

**Key Insight:** The probability > F for the model is less than 0.0001, suggesting that the model is highly statistically significant.

**Parameter Estimates**

This table displays the estimated coefficients for the parameters in the model, with respective standard errors, t ratios, and probabilities.

- **Term:**
  - **Intercept:**
    - Estimate: 1.4358731
    - Standard Error: 0.084055
    - t Ratio: 17.08
    - Prob > |t|: <.0001*
  - **Prey Length:**
    - Estimate: -0.051456
    - Standard Error: 0.014709
    - t Ratio: -3.50
    - Prob > |t|: 0.0030*
  - **Prey Speed:**
    - Estimate: 0.0040046
    - Standard Error: 0.000628
    - t Ratio: 6.38
    - Prob > |t|: <.0001*

**Key Insight:** Both "Prey Length" and "Prey Speed" are shown to be statistically significant, with their probabilities being less than 0.05, indicating their influence in the model.
Transcribed Image Text:**Analysis of Variance** The table summarizes the analysis of variance for a model evaluating the influence of certain factors. - **Source:** - **Model:** - Degrees of Freedom (DF): 2 - Sum of Squares: 0.41321380 - Mean Square: 0.206607 - F Ratio: 23.3512 - Probability > F: <.0001* - **Error:** - Degrees of Freedom (DF): 16 - Sum of Squares: 0.14156515 - Mean Square: 0.008848 - **C. Total:** - Degrees of Freedom (DF): 18 - Sum of Squares: 0.55477895 **Key Insight:** The probability > F for the model is less than 0.0001, suggesting that the model is highly statistically significant. **Parameter Estimates** This table displays the estimated coefficients for the parameters in the model, with respective standard errors, t ratios, and probabilities. - **Term:** - **Intercept:** - Estimate: 1.4358731 - Standard Error: 0.084055 - t Ratio: 17.08 - Prob > |t|: <.0001* - **Prey Length:** - Estimate: -0.051456 - Standard Error: 0.014709 - t Ratio: -3.50 - Prob > |t|: 0.0030* - **Prey Speed:** - Estimate: 0.0040046 - Standard Error: 0.000628 - t Ratio: 6.38 - Prob > |t|: <.0001* **Key Insight:** Both "Prey Length" and "Prey Speed" are shown to be statistically significant, with their probabilities being less than 0.05, indicating their influence in the model.
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