Question 1 0.5 pts In a particular species of nches, the trait for orange beaks is determined by allele '0' and the trait for ivory beaks is determined by allele '0'. A cross between an orange beak and an ivory beak finch results in ve offspring all with pale, ivory orange beaks, Which of the following is quantitative data in the write up above? number of offsrping O the type of allele 0 type of beak 0 species of nch Question 2 0.5 pts During an experiment on the effects of air temperatures on animal behavior in the spring a scientist records the hourly temperature. This is an example of what type of data? C) data on an interval scale 0 data on a ratio scale 0 data on a nominal scale C) data on an ordinal scale Question 3 0.5 pts discrete or continuous: The fraction of birds in a large sample infected with avian flu virus is [x] numerical data. continuous Question 4 0.5 pts Heartbeats per minute of a Tour de France cyclist. averaged over the duration of the race. Is this a numerical variable or categorical variable? categorical If numerical, state whether the variable is discrete or continuous; or if categorical, state whether the categories are ordinal (ie, have a natural order) or nominal (do not have a natural order). nominal Question 5 0.75 pts Choose the box plot that best represents the following data: 17 22 18 133 14 36 39 41 25 31 18 19 16 21 21 A. B. C . HT D. 6 2 4 8 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 O A O B OC O None of theseResearchers measured the transpiration rate of corn plants at different temperatures. If they were to graph the data, which variable should be placed on the X axis. Temperature (C) 20 23 27 28 Transpiration 1.5 3 5 4.5 Rate (mmol/m2.sec) O temperature O transpiration rate O eitherWhich of these box plots represent a sample that has: ItttttltttttlllttttttttttI o 2 4 o a 1012 I4161820222426233032343638404244464850 OB QC number of students CO less than 130 to 135 to 140 to 145 to 150 to 155 to 160 and 130 134 139 144 149 154 159 more height (cm) What type of graph is shown in this figure? O histogram bar plot O box plot O scatter plotWhich of the following statements is/are correct? O the range of a sample is a measure of central tendency the range of a sample is a measure of dispersion in a normal distribution the mean=median=mode O if two variables collected from the same sample have a correlation of zero they must be independentWhich of the following is a correct measure of central tendency for this data set? 11, 27, 29, 35, 37, 39, 40, 42, 45, 47, 49, 49, 52, 52, 56, 64, 67, 70, 81 O the range is 70 O the median is 45 O the mean is 47 O the mode is 51The coefficient of variation can be used to compare variation in data sets that are on two different scales. True 0 False Question 12 0.75 pts The most important descriptive statistics for numerical data are those measuring the location of a frequency distribution and its Spread . The location tells us something about the average or typical individual - where the observations are centered. The SPread tells us how variable the measurements are from individual to individual how widely scattered the observations are around the center. A researcher measured the height of6 plants and found the following heights: 35cm, 49cm, 21cm, 35cm, 36cm and 73cm What is the mean height of this group of plants? (calculate to one decimal point) Question 14 0.75 pts Researchers have created every possible "knockout" line in yeast. Each line has exactly one gene deleted and all the other genes present (Steinmetz et al. 2002). The growth rate how fast the number of cells increases per hour of each of these yeast lines has also been measured, expressed as a multiple of the growth rate of the wild type that has all the genes present. In other words, a growth rate greater than 1 means that a given knockout line grows faster than the wild type, whereas a growth rate less than 1 means it grows more slowly. Below is the growth rate ofa random sample of knockout lines: 0.9, 1.01, 1.02,1, 0.72, 0.71, 0.72, 0.88, 0.83, 0.95, 0.81 What is the mean growth rate of this sample of yeast lines (answer to 2 decimals)? 0.81 A researcher measured the height of 5 plants and found the following heights; 25cm, 25cml 456m, 11cm and 44cm. What is the mean height of this group of plants? (answer to one decimal place) Question 16 0.75 pts A microbiologist is studying the effect of a new antibiotic on the bacteria Staphylococcus aureus. He treats five plates containing 1000 bacteria each with the antibiotic, waits 24hrs and then counts the number of bacteria killed. The data collected are shown in the table below. What is the median of this set of data? Number of Dead Bacteria QUESIIO" II I Pl: The following weights were obtained from a sample ofa population of Woodrats in a forest in Virginia: 8.1g, 9.6g, 7.9g, 7.13, 7.93, 7.3g, 9.9g, 7.9g, 7.7g, 8.2g What is the mode of this population? Question 18 1 pts While conducting a study on the growth rates of mice on a copper deficient diet, Dr. Ambrose recorded the following weights in grams of the mice after three weeks on the diet. 14.9, 13.5, 6.8, 4.2, 10.6 What is the standar deviation (3) in this set of samples? (calculate to 2 decimal places) Researchers have created every possible "knockout\" line in yeast. Each line has exactly one gene deleted and all the other genes present (Steinmetz et al. 2002), The growth rate 4 how fast the number of cells increases per hour - of each of these yeast lines has also been measured, expressed as a multiple of the growth rate of the wild type that has all the genes present. In other words, a growth rate greater than 1 means that a given knockout line grows faster than the wild type, whereas a growth rate less than 1 means it grows more slowly. Below is the growth rate of a random sample of knockout lines: 0.63, 0.76, 0.9, 0.81, 0.64, 0.76, 0.61, 0.91, 0.65, 0.61, 0.78 What is the standard deviation of growth rate this sample of yeast lines (answer to 3 decimals)? The Maryland Biological Stream Survey used electrofishing to count the number of individuals of each fish species in randomly selected 75- m long segments of streams in Maryland. Here are the numbers of blacknose dace, Rhinichthys atratulus, in streams of the Rock Creek watershed: Stream fish/75m Mill_Creek_1 25 Mill_Creek_2 93 North_Branch_Rock_Creek_1 40 North_Branch_Rock_Creek_2 90 Rock_Creek_1 61 Rock_Creek_2 70 Rock_Creek_3 95 Rock_Creek_4 70 Turkey_Branch 36 What is the standard deviation (s) for this set of data? (calculate to 2 decimal places) S =1 n - 1The Maryland Biological Stream Survey used electrofishing to count the number of individuals of each fish species in randomly selected 75-m long segments of streams in Maryland. Here are the numbers of blacknose dace, Rhinichthys atratulus, in streams of the Rock Creek watershed: Stream fish/75m Mill_Creek_1 68 Mill_Creek_2 65 North_Branch_Rock_Creek_1 97 North_Branch_Rock_Creek_2 72 Rock_Creek_1 81 Rock_Creek_2 44 Rock_Creek_3 25 Rock_Creek_4 90 Turkey_Branch 31 What is the range for this set of data?What is the interquartile range of the following set of data? Answer to 1 decimal place when needed and use the Excel formula = quartile.inc(array, quart). 3, 14, 29, 35, 43, 51, 64, 79, 86, 92, 110The Maryland Biological Stream Survey used electrofishing to count the number of individuals of each fish species in randomly selected 75-m long segments of streams in Maryland. Here are the numbers of blacknose dace, Rhinichthys atratulus, in streams of the Rock Creek watershed: Stream fish/75m Mill_Creek_1 22 Mill_Creek_2 87 North_Branch_Rock_Creek_1 99 North_Branch_Rock_Creek_2 75 Rock_Creek_1 101 Rock_Creek_2 76 Rock_Creek_3 12 Rock_Creek_4 62 Turkey_Branch 86 What is the variance (s ) for this set of data? (calculate to 2 decimal places) [1= 1 (X, - X)2 n- 1The Maryland Biological Stream Survey used electroshing to count the number of individuals of each fish species in randomly selected 75- m long segments of streams in Maryland; Here are the numbers of blacknose dace, Rhinichthys atratulus, in streams ofthe Rock Creek watershed: Stream sh/75m M i | |_Creek_1 76 Mi||_Creek_2 102 North_Branch_Rock_Creek_1 12 North_Branch_Rock_Creek_2 39 Rock_Creek_1 55 Rock_Creek_Z 93 Rock_Creek_3 98 Rock_Creek_4 53 Turkey_Branch 102 What is the standard deviation (5) for this set of data? Which box plot below correctly represents the dataset below? Sample ID Value 40 21 28 25 35 O 6 0 0 V Q UT A W N - 18 30 43 20 O 44 42 I 40 38 36 34 32 30 28 26 24 22 20 18