Obervation Sample 1 Sample 2 1 10 8 279 3 13 7 496 584 11. Consider the data for two independent random samples that have been taken from two normal populations above. (a) Compute the two sample means. (5 points) (b) Compute the two sample standard deviations. (5 points) (c) Using the data provided, what is the point estimate for the difference between the two population means? (5 points) (d) Conduct at 90% confidence test for whether the two population means are different from each other?

answer: 45

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

the answer is a and d

step-by-step explanation:

total income = price of one ticket   *   number of tickets sold

  y                 =     4                                   x

so the equation is y=4x     with x≥0   because number of tickets sold can not be negative

thus the equation is a semi -line with an end point at

(0,0)

passing through :

x=1     y=4(1) = 4   so through (1,4)