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

answer set (b) 0.5, 3/4 80% is in order from least to greatest.  

step-by-step explanation:

in order to compare rational numbers to each other, it is much easier if they are in the same form.   typically, the best form in which to evaluate rational numbers is in decimals.   in order to convert a percent to a decimal, you would divide the given percentage by 100.   you can also accomplish the conversion by moving the decimal point over two places to the left.   for example, the decimal value of 80% is 80/100, or 0.8.   in order to convert a fraction to a decimal, you need to divide the numerator by the denominator.   for example, 3/4 is 0.75.   so, for choice (b) 0.5 3/4 (0.75), 80% (0.8) is the only choice in which the numbers are in order from least to greatest.  

168

step-by-step explanation:

i am pretty sure that the answer is 168