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Question 1.7.2   How do scientists know how long ago it lived? (1)

Question 1.7.1   Here is a picture of an animal called a Trilobite. It became extinct more than 250 million years ago.     Click on the button below to open the picture of the Trilobite.   How do we know it ever existed? (1)

QUESTION 1 Answer the following questions regarding evolution and fossils:

Twenty people, including yourself, are to measure the width of a room to the tenth of millimeter. Assume that everyone uses the same well calibrated measuring device such as a tape measure. All measurements are not likely to be exactly the same; some will be higher than the true value and some lower. These differences represent  random errors. If you want to minimize the effect of random errors in determining the width of the room, the better choice is to report the mean (average) of all measurements.

Descriptive statistics are used to organize and describe the characteristics of a collection of data.

Question 2.6.1   This graph shows how the average height of men has changed between 1871 and 1975.     Click on the button below to open the picture of the table.   What does the graph show has happened to the average height of men during this time? (1)

Based on your understanding of the blood flow of the kidney, the red blood cells at the pointers flow directly from the _____________.

In quantifying statistical significance, the difference between the observed and the expected outcomes as expressed by the null hypothesis is less than or equal to 0.05, we conclude that the difference is statistically significant.

Suppose that you randomly select 300 internet users and ask them if they use a name as a password. About 10% of the participants indicate that they do. The value of 10% is a population parameter.

Name                          Major                            Age Richard                   Nursing                           19 Sara                         Psychology                     18 Jordan                     Chemistry                       21 Mike                        Nursing                           18 Liz                            Nursing                           21 Nicole                      Psychology                     20 Pam                         Nursing                           21 Given the above, the major that depicts the mode is nursing.