Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $10,000 and $40,000. Assume that a 95%
confidence interval estimate of the population mean annual starting salary is desired.
a. What is the planning value for the population standard deviation?
o =
b. How large a sample should be taken if the desired margin of error is $400? Round
your answers to next whole number.
150
$270?
$100?
X
c. Would you recommend trying to obtain the $100 margin of error? Explain.
No, the sample size would probably be too time consuming and costly.
How would I work this out?

there are no figures how am i supposed to answer this question

step-by-step explanation:

option a, c,d are correct.

step-by-step explanation:

from the given figure, it is given that z is equidistant from the sides of the triangle rst, then from triangle tzb and triangle szb, we have

tz=sz(given)

bz=zb(common)

therefore, by rhs rule,δtzb ≅δszb

by cpctc, sz≅tz

also, from δctz and δasz,

tz=sz(given)

∠tcz=∠saz(90°)

by rhs rule, δctz ≅ δasz, therefore by cpctc, ∠ctz≅∠asz

also,from δasz and δzsb,

zs=sz(common)

∠zbs=∠saz=90°

by rhs rule, δasz ≅δzsb, therefore, by cpctc, ∠asz≅∠zsb

hence, option a, c,d are correct.

b. x- 48 =120

step-by-step explanation: