Reconsider the percentage of titanium in an alloy used in aerospace castings from exercise 8-52. recall that s = 0.37 and n = 51. (a) test the hypothesis h0 : σ = 0.25 versus h1 : σ ≠ 0.25 using α = 0.05.
(a) state any necessary assumptions about the underlying distribution of the data.
(b) find the p-value.
(c) explain how you could answer the question in part (a) by constructing a 95% two-sided confidence interval for σ.

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)