Number of sexual partners in a year. Is this a numerical variable or categorical variable? 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). Question 2 0.5 pts What characteristics do the "best" estimates of population parameters have? (choose all that apply) C] when a large number of samples from the population is taken, the outlying samples will balance each other out D the statistic obtained from any single sample of the population will he very close to the value ofthe parameter being estimated [1 even ifthe sample size increases the value of the statistic being measured will not vary greatly Question 3 0.5 pts Gender. Is this a numerical variable or categorical variable? 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)' Question 4 0.5 pts Dr. Jennings wants to know how many different types of deciduous trees are found along the Buttermilk Trail near Reedy Creek in thejames River park system. She sets up several transects and sends students out to take data on the trees What sampling method are they most likely to be using in this study? 0 line-intersect sampling 0 cluster sampling 0 stratified random sampling 0 simple random sampling Question 5 0.75 pts Animal Count in Area 54 250 200 150 Count (per week) 100 50 Bear Fox Wolf Mink Mammal What type of graph is this data presented in? O Bar plot O Histogram O box plot O scatter plotQuestion 6 0.75 pts Sometimes you'll be asked to round your answers to decimals, other times to significant figures. There are not always equivalent. Significant gures seems to give students the most trouble. Let's test your knowledge. When graphing the variable is shown on the x-axis and the variable is shown on the y-axis. Question 7 0.75 pts Researchers measured the transpiration rate of corn plants at different temperatures. If they were to graph the data, which variable should be placed on the Y axis. Temperature (C) 20 23 27 28 Transpiration 1.5 3 5 4.5 Rate (mmol/mzsec) 0 temperature 0 transpiration rate 0 either The following data give the photosynthetic capacity of nine individual females of the neotropical tree Ocotea tenera, according to the number of fruits produced in the previous reproductive season (Wheelwright and Logan 2004). The goal of the study was to investigate how reproductive effort in females of these trees impacts subsequent growth and photosynthesis. Number of fruits Photosynthetic capacity produced previously (moles O2/mz/s) 10 13.0 14 11.9 5 11.5 24 10.6 50 11.1 37 9.4 39 9.3 162 9.1 14 7.3 What type of graph would best display the association between these two variables? The number of fruits produced previous is the variable. (explanatory or response) The photosynthetic capacity is the variable. (explanatory or response) Below is a graph of the table and describe the association between the two variables. (positive or negative) 13 N 11 - Photosynthetic capacity (moles O2/m2/s) 50 100 150 200 Fruits produced previouslyQuestion 9 0.75 pts Why do you need a measure of variability? O to calculate the median O to describe how far the data are spread around the mean O to calculate the mean O to calculate the interquartile range Question 10 0.75 pts Variance allows differentiation between different distributions that have the same mean. O True O False Question 11 0.75 pts Medians can be used as a measure of central tendency in what type(s) of data? O nominal O ordinal O interval O ratioQUESIIOH 14 0.13 PIES If the mean, median and mode for a given population are all equal, then we know that its distribution is? 0 symmetrical O asymmetrical O skewed Question 13 0.75 pts A microbiologist is studying the effect of a new antibiotic on the bacteria Staphylococcus aureus' He treats six plates containing 1000 bacteria each with the antibiotic, waits one week and then counts the number of bacteria killed. The data collected are shown in the table below. What is the mean of this set of data? (round to nearest whole number) # of Dead Bacteria 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 of a random sample of knockout lines: 0.62, 0.84, 0.78, 0.9, 0.95, 0.9, 0.61, 0.81, 0.68, 0.7, 0.87 What is the mean growth rate of this sample of yeast lines (answer to 2 decimals)? Question 15 0.75 pts A researcher measured the height of 5 plants and found the following heights; 44cm, 44cm, 15cm, 47cm and 11cm. What is the mean height of this group of plants? (answer to one decimal place) Question 16 0.75 pts A researcher measured the height of 5 plants and found the following heights; 30.9cm, 33.2cm, 36.6cm, 37.6cm and 46cm. What is the median height of this group of plants? (calculate to one decimal)Question 17 1 pts The following weights were obtained from a sample of a population of Small Mouth Bass in a lake in Virginia: 8.68, 9.4g, 7.1g, 7.4g, 7.1g, 7.3g, 9.6g, 7.1g, 7.8g, 8.4g What is the mode of this population? Question 18 1 pts 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 75 Mill_Creek_2 12 North_Branch_Rock_Creek_1 74 North_Branch_Rock_Creek_2 63 Rock_Creek_ 102 Rock_Creek_2 42 Rock_Creek_3 40 Rock_Creek_4 93 Turkey_Branch 84 What is the standard deviation (s) for this set of data? (calculate to 2 decimal places) [1= 1 (, - X)2 S = 1/ n - 1Question 19 1 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: 0.99. 0.78. 1.04, 0.88, 0.75, 0.78, 0.77, 0.9, 0.92, 0.83, 0.75 What is the standard deviation ofgrowth rate this sample of yeast lines (a nswer to 3 decimals)? Question 20 1 pts While conducting a study on the growth rates ()1 mice on a copper deficient diet. Dr. Ambrose recorded the following weights in grams ()1 the mice after three weeks on the diet. 116,93. 16.5, 14.4,14.3 What is the stander deviation (5) in this set of samples? (calculate to 2 decimal places) Question 21 1 pts 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). 9, 14, 22, 37, 42, 58, 63, 72, 86, 95, 109 Question 22 1 pts 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_1 168 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?Question 23 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. 16.6,14.6,5,15.5,11.4 What is the variance (32) in this set of samples? (calculate to 2 decimal places) 52- 2.110(5- 562 111 Question 24 1 pts A sample of deer mice are analyzed. Tale length is measured in cm and these results are obtained: (10, 30, 25, 27}. What is the standard deviatien ofthis sample? Round your answer to 1 decimal place Question 25 1 pts Which box plot below correctly represents the dataset below? Excel Tip: When calculating the quartiles, use the formula =QUARTILE.INC(array, quart), where array is the range of your values and quart is the quartile - you'll need to calculate it for each quartile). Sample Value D 1 41 2 27 3 31 4 14 5 23 6 41 48 O ON