2. The region of experimentation for three factors are time (40 ≤ ≤ 80 min), temperature (200 ≤T₂ ≤300 °C), and pressure (20 ≤P≤50 psig). A first-order model in coded variables has been fit to yield data from a 23 design. The model is y = 30 + 5x₁ +2.5x₂ +3.5x3 Consider 47₁ = 5, is the point T₁ = 85, T₂ = 325, P-60 on the path of steepest ascent?

10 veterans who suffer from PTSD are tested before and after taking an anti-anxiety medication thought to reduce PTSD symptoms. How do I report my findings in APA format?  Before condition (M=52, SD= 13.4, SE=4.228) After condition (M=43, SD=13.4, SE=4.243) t(9)=1.581, p >0.05, d=0.500.

I am completely lost please help

Access the significsnce of each of the variables in the attached table. For age, write out all of the steps for hypothesis testing. For the other variables, report a p-value and conclusion. Write out the interpretation of the hazards ratios for age and sex in words. What is the estimated hazard ratio for a 10-year increase in age?

A study was conducted in California to investigate the relationship between house size (x in square feet) and house price (y in thousands of dollars). The least-square regression line is given below y= 263.5 + 0.174x  R2 = 0.728 a) Interpret the slope of the given regression line b) find the predicted house price for a house size of 120 square feet c) if the actual house price was $449.5 thousand dollars for a house size of 1200 square feet, calculate the residual of the home  d) find the correlation coefficient. Round to 3 decimal places

The best predicted vLue of y when x =8

Experimenters wants to assess the association between X and Y, the scatter plot of X and Y showed a quadratic pattern. After applying the appropriate regression model, experimenters want to produce a prediciton interval for X = 20. Using StatCrunch with 95% confiendence, the result interval is 223 to 267. Provide the most appropriate interpretation of this interval.

A) Y=1566.67x + 1716.67 B) Y= 3x + 2000 C) Y= 4700x + 1500 D) Y= x + 1700