Suppose an animal scientist, Dr. Dew believes that birth weight (in kg) explains the variation in the length of gestation (in days until birth) for various mammals. To support this fact, he collected data and found out that when the birth weight was x = length of gestation was y = Hint: E:(x; – a)² = 540, 916.8, E; (yi – 9)² = 195, 233, and E:(yi – ŷ)² = 181, 018. {60, 110, 44, 900, 107} the {122, 241, 61, 365, 617}. The fitted model was ŷ = 241.61+0.162x. a) Ignore the birth weight (x). If the length of gestation are independently and identically distributed (i.i.d.) with mean u and variance o?, what is the estimate for u and o?, respectively?

Can values of a chi-square variable be negative yes or no?

When a forensic expert determines time of death, they often have additional information besides body temperature. Suppose a coroner finds that the person who was murdered had an infection that probably raised the core body temperature to around 102 degrees. Using the same cooling constant, ambient room temperature, and temperature data as in problem 1, make a new estimate for the time of death. Again, write your answer as a time, not just as ? minutes.   A(Ambient temp)=68 B(temp)=85.9 K(cooling constant)=0.183702

2.) Explain why the relative frequency column of a frequency table might not sum to 1.0.

∑i=30704(i–30)  Calculate. Show work.

It is estimated that within ? years, the local newspaper circulation will be ?(?) = 100?2 + 400? + 5000. a)Obtain an expression for the rates of change of circulation respect the time ?.b)Which is the rate of change of circulation respect to ? equal to 5 years? Willdecrease or increase the circulation in this moment?c) How is the change of circulation during the sixth year?

(b) A = 0.3 rad 10

Explain the effect of α level on power?