Question

De people wak faster in the airport when they are departing getting on a plane) ar do they walk faster when they are arriving getting all a plane)? A reputable researcher measured the walking speed of randorn travelers in ta Inlerrational Airports. His findings are suitrarized in the table. Complete parts (al-(c) below. ! Click the icon to via tha findings. i Walking Speed (a) Is this an observational study ar a designed experiment? Why? O A. This is an observational study since the researcher dd rot infuence the deta. OB. This is an observatioral sludy since the researcher influenced the cale. OC. This is a designed experimar since the researcher did not influence the data, OD. This is a desgned experiment since the researchar Influenced the data Arrival Departure 252 Direction of Travel Mean speed (teet per minute) Standard deviation (fect per minute) Sample size 53 (b) Explain why it is reasonable to use Welch's blasi. 35 35 Print Done O A. The samples are random small and independent O B. The populations are normally districted. OC. The samples are rencom large and independent OD. The samples are rencom, large and dependent. (c) Do individuals walk at different speeds deperding on whether they are deparing er arriving at the - 0.1 level of significance? Lely represent the meant speed of people deparing and 12 represerl the mean speed of people arriving State the null and alternative hypothesie. OB. He=H2 HP 2 OA. H: WW2 H: 4.2 OC. Hy L. 2 OD. He: 1412 H:HH2 Determine the P-value for the hypothesis leet P-value = {Round to three cocimal places as neded.) Choose the correct condusion. O A. Reject Ho. There is sullicient evidence at the ce-0.1 level of eignificance to say that travelers wak at different speeds depending on whether they are arriving or departing. OB. Do not reject Ho. There is not sufficient evidence at the e=0.1 level of significance to say that travelers walk at different sacens depending on whether they are arriving ar departing. OC. Do not relect Hc. There is sufficient evidence at the x = 0.1 level of algnificance to say that travelers walk at different speeds depending on whether they are bring or departing. OD. Reject Ho. There is no sufficieril evidence alte - 0.1 level of significance to say Il-al travelers walk a. uifferent speecs depending on whether they are arriving or reparting.

Answer 1

a) study This is since tho influence observational researcher dial the data samples and independent large, random C) Hoi en ll2 llit uz 2 4 92 + 2 m2 07 + su M₂² (02-1 mie ne(n-1) t= I, - x2 2 s²+ să ni 2 5C 1 = 252 x2 = 268 si = 53 S2 = 34 m = 35 M2= 35 t= 1.5033 57 -0.138 not P valuer 0.1384 p value > or 1 Do not reject Ho. Inere sufficient evidence that travellers walk speed x=0.1 to say at different