The correlation between the foot lengths of fathers and their (adult) sons, measured in inches, is r = 0.92. If fathers' foot lengths were measured in millimeters (1 inch = 25.4 millimeters), and sons' foot lengths were measured in furlongs (one furlong equals 7,920 inches), the correlation between foot lengths of fathers and sons would be:

a. much smaler that 0.92.
b. sightly smaler than 0.92
c. unchanged: equal to 0.92.
d. slightly larger than 0.92
e. much Larger that 0.92

Ineed to find the answer to number 2

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to