The amount of time a service technician needs to change the oil in a car is uniformly distributed between 11 and 21 minutes. Let X = the time needed to change the oil on a car. b. Graph the distribution and find P (x > 19). Round to the nearest tenth.

Please indicate whether the above scatter plot indicates an r value that is: a. close to r=-1 b. close to r=+1 с. clearly negative but not near r = -1 d. clearly positive but not near r = +1

Find the z-score that best satisfies the condition. 10% of the total area is to the left of z. 2=0 (Round to the nearest hundredth.)

Match each variable with its Level of Measurement. Place of residence a. Nominal Height (in in) b. Ordinal Mood on a Happy/OK/Sad scale c. Interval Movie ratings (1 to 4 stars) d. Ratio

Pre Calc Direct and Inverse Variation

Fill in the rest of the joint distribution so that X and Y are independent. There are two possible answers: Y 0 1 X=0 1 ? 2/9 2/9

k. Find the p nding to the data speed 5.9 Mbps. 0.2 0.2 0.2 03 05 E 0.7 0.9 1.5 1.7 2.2 2.4 37 3.9 4.3 5.7 91 94 94 10 5 11.3 12.3 13.7 14 9 15.3 25 8 Percentile of 5.9 =0.2 (Round to the nearest whole number as needed.) LO O 2N O o N 5 O 2N

It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific cultural affiliation as the elevation of the site increases. Let x be the elevation (in thousands of feet) for an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. Suppose that the following data were obtained for a collection of archaeological sites in New Mexico:  x 5.75 6.75 7.75 8.50 9.25 y 27 16 46 62 95 ​ What percentage of the variation in y cannot be explained by the corresponding variation in x and the least-squares line? Round your answer to the nearest tenth of a percent.    3.4%        18.4%        81.6%        9.7%