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 6.25 6.75 7.75 8.25 y 31 26 38 74 72 Find the value of the coefficient of determination r2.     –0.939   –0.883   0.883   –0.061   –0.117

Given the weekly price and quantity (Qx and (Px) data for Andy’s ice cream over the past 12 weeks and the price of another ice-cream flavor (Po) as: Qx 84 82 85 83 82 84 87 81 82 79 82 78 Px 8.50 9.00 8.75 9.25 9.50 9.25 8.25 10.00 10.00 10.50 9.50 10.25 Po 5.25 6.00 6.00 6.50 6.25 6.25 5.25 7.00 7.25 7.25 6.75 7.25 a. Use excel regression to estimate the weekly demand for Andy’s ice-cream (attach the output of the regression estimate (Hint: Use regression in excel to find the estimated demand function: Enter the data in excel, click on Data Analysis, and use the regression command). b. Are the coefficients on the two prices statistically significantly different from zero at the 5% significance level? How do you know? c. What the R2? d. Explain what R2 means.

please answer question 2

Suppose that a customer is purchasing a car. He conducts an experiment in which he puts 10 gallons of gas in the car and drives it until it runs out of gas. He conducts this experiment 15 times on each car and records the number of miles driven.   Full data set    Car 1 216 243 205 242 239 297 295 172 270 251 165 310 265 316 278   Car 2 231 220 223 205 245 257 242 292 248 252 287 255 250 293 251   Median for Car 2 M=___________mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.) Range for Car 1 R=__________mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.)   Range for Car 2 R=__________mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.) Sample standard deviation for Car 1 s=_________mi​ / 10 gal ​(Type an integer or decimal rounded to one decimal place as​ needed.)   Sample standard deviation…

The lengths of 40 leaves of a plant are measured correct to the nearest millimeter. Less than Cumulative frequency of the data obtained is represented in the following table. Which central tendency will be most appropriate for the data set? Length (mm) Less than cum freq Less than 127 3 127-135 136-144 17 145-153 29 154-162 34 163-171 38 172-180 40 O a. mode O b. mean O. midrange O d. median

2.) Explain why the relative frequency column of a frequency table might not sum to 1.0.

The following data are the maximum temperatures (in degrees Fahrenheit) of 17 cities in the United states measured on the same day. 53 70 65 74 85 76 84 70 61 59 54 66 56 71 81 73 76 Construct a box and whisker plot for the data.

Answer all questions

1. Report the answer with the correct number of significant figures: a b C d e |f 6.0 g Ih li lj 1.4 +2.35 = 7.635 +2.34 = 13.627 -1 = 11.681 3.2 = 14.40 +2.6 - 7.211 = 13.60*3= |27.1*3.47 = 69.3 / 2.467 = 47.321/5.7 = 72.367/8.34 * 2.1 =

QUESTION 10 An outlier is an individual value that: OA. deviates from the pattern. B. extends the pattern. O C. determines the strength of the relationship. O D. outlines the general form of the data.