State whether each of the following situations is a correctly stated hypothesis testing problem and why. (a) h h 0 1 : ,: μ = 25 25 μ ≠ (b) h h 0 1 : > , : σ σ= 10 10 (c) hx hx 0 1 : ,: = ≠ 50 50 (d) hp hp 0 1 : ,: = . = . 01 05

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days