# Question: Use the coding of Exercise 14 15 to rework both parts

Use the coding of Exercise 14.15 to rework both parts of Exercise 14.42.

In exercise

When the x’s are equally spaced, the calculation of and can be simplified by coding the x’s by assigning them the values . . . ,- 3,- 2,- 1, 0, 1, 2, 3, . . . when n is odd, or the values . . . ,- 5,- 3,- 1, 1, 3, 5, . . . when n is even. Show that with this coding the formulas for and become

In exercise

When the x’s are equally spaced, the calculation of and can be simplified by coding the x’s by assigning them the values . . . ,- 3,- 2,- 1, 0, 1, 2, 3, . . . when n is odd, or the values . . . ,- 5,- 3,- 1, 1, 3, 5, . . . when n is even. Show that with this coding the formulas for and become

**View Solution:**## Answer to relevant Questions

Use the coding of Exercise 14.15 to rework both parts of Exercise 14.45. In exercise When the x’s are equally spaced, the calculation of and can be simplified by coding the x’s by assigning them the values . . . ,- ...With reference to Exercise 14.42, test the null hypothesis β = 1.25 against the alternative hypothesis β > 1.25 at the 0.01 level of significance. In exercise Various doses of a poisonous substance were given to groups of ...With reference to Exercise 14.42, use the theory of Exercise 14.22 to construct a 95% confidence interval for a. In exercise Use the result of part(b) of exercise 14.20 to show that Is a value of a random variable having ...An achievement test is said to be reliable if a student who takes the test several times will consistently get high (or low) scores. One way of checking the reliability of a test is to divide it into two parts, usually the ...If the row categories as well as the column categories of an r × c table are ordered, we can replace the row headings and also the column headings by consecutive integers and then calculate r with the formula obtained in ...Post your question