\fWhat is the conclusion? 0 We do not have sufficient evidence to suggest that the average weight of polar bears has significantly increased for the new sample when compared to the former study. 0 We do not have sufficient evidence to suggest that the average weight of polar bears is significantly less for the new sample when compared to the former study. 0 We have sufficient evidence to show a significant difference in the average weight of polar bears between the new sample and the former study. 0 We have sufficient evidence to suggest that the average weight of polar bears is significantly less for the new sample when compared to the former study. 0 We have sufficient evidence to suggest that the average weight of polar bears has significantly increased for the new sample when compared to the former study. Previous Page Next Page Damn 1 nf Q Question 4 (2 points) As a polar bear researcher, you are concerned about the effects of climate change and global warming may be having on polar bears in a particular area of the Artic Circle. Due to a reduction in habitat and an increase in food scarcity, you believe the average weight may be decreasing (Source: https://www.nworg/EducationalResources/Wildlife- Guide/MammaIs/Polar-Bear). Suppose a former study (F) from 20 years ago found the average adult male weight to be 1100 pounds with a standard deviation 125 pounds for a random sample size of 50 bears. A new random sample (N) of 40 adult male polar bears find the average to be 1025 pounds with a standard deviation of 130 pounds. Conduct a test of significance for or = 0.05. What is the conclusion? Question 5 (2 points) Suppose you are interested in knowing if the amount of dissolved oxygen levels (DO) in lakes from rural areas is significantly greater than those from the urban areas. For your experiment, you measured the DO levels in randomly sampled lakes in two different area types (urban and rural) at the same time of year. Conduct a hypothesis test at 5% level of significance with hypotheses Ho: MRural-MUrban S O and HA: MRural"MUrban > O. Use the table below. (Sources:https://www.canr.msu.eduews/understanding_the_role_of_oxygen_in_our_lakes_and_ponds; https://www.usgs.gov/special-topic/water-science-school/science/dissolved-oxygen-and-water?qt- science_center_objects=0#qt-science_center_objects) Sample Size of Lakes Mean DO Levels Standard Deviation Rural 15 9.5 1.14 Urban 13 8.8 0.75 What is the test statistic