After a ham is cured it may be smoked to add flavor or to ensure it lasts longer. typical grocery-store hams are smoked for a short period of time, whereas gourmet hams are usually smoked for at least one month. a random sample of 36 grocery-store hams was obtained, and the length of the smoking time was recorded for each. the mean was
hours. assume σ = 8 hours.

a) what assumptions are required so that you can construct a confidence interval?
b) find a 99% confidence interval for the for the mean amount of time a grocery-store

ham is smoked.
c) interpret your answer in part b).
d) the precision required for someone in the deli who cooks the grocery store hams is a

margin of error (half-width) of 2 hours. how large a sample is necessary for this precision?

107

Step-by-step explanation:

Given that after a ham is cured it may be smoked to add flavor or to ensure it lasts longer.

Let X be the smoking time . Then X is N(mu, 8)

a) The sample is drawn at random

b) The sample represents the population

c) Sample size is sufficient to represent the population

b)For 99% conf interval z critical is taken since population std dev is given

Z critical = 2.58

Hence confi interval =

c) As sample sizes are large and samples are randomly drawn, we can be 99% confident that sample mean falls within this interval

d) If margin of error is only 2, then we must have

Hello : let  A(-3,7)    B(3,3)
the slope is :   (YB - YA)/(XB -XA)
(3-7)/(3+3)  = -2/3
an equation is : y=ax+b     a is a slope

y = (-2/3)x +b

the line through point B (3,3) :  3 = (-2/3)(3)+b
b =5 
the equation is : y =(-2/3)x+5