BIL 151 Midterm exam_u4_key

BIL 151 Midterm exam_u4_key - BIL 151 Midterm exam Name_...

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BIL 151 Midterm exam Name_________________________________________ For all multiple choice, choose the one best answer 1) (12 points) Label each of the following types of data (a. Attribute; d. Discrete numerical; c. Continuous numerical) __D__i. Number of petals in different species of flowering plants __C__ii. Rate of catalase activity __C__iii. Average number of squirrels per tree __A__iv. Ability to roll tongue __D__v. Frequency of boys in a family with 10 children __A__vi. Genotype at a particular locus 2) (8 points) Given the following case study, write a null and an alternative hypothesis. A researcher observes that squirrels in the southern region of the United States live in large groups. He notices that the incidence of disease in these squirrels is much higher than that of squirrels that live in the northern region of the United States. Squirrels in the northern region, in turn, live in small groups. H O : There is no difference in incidence of disease between small and large groups of squirrels (or you could have said between North and South) H A : There is a difference in incidence of disease between small and large groups of squirrels (or between North and South) Design an experiment to test your hypothesis. Make sure to say how you would set up the experiment, what data you would collect, and how you would analyze your data after collecting them. Many possible answers. To get full credit you had to show that you would control for all variables but one (so, looking at small and large groups in the North, but not small groups in the North and large groups in the South) and you had to say you would analyze your data with statistical tests to determine if you would reject your null hypothesis or not.
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3) (2 points) Which one is the least like the others? a. Median b. Range c. Mode d. Average 4) (2 points) The probability that a sprinter will win races A, B and C is 1/5, 1/10, and 1/20 respectively. If he enters all three races, what is the probability that he will win one of them? Sum rule. 7/20, or 0.35 5) (4 points) What is the median in this frequency distribution? What is the mode? Median: 0.89 Mode: 0.88
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For questions 6-10, refer to the pedigree in question 6. 6) (10 points) Below is a pedigree for an inherited lung disease. Give the genotypes for each individual marked with a lower case letter. If there is more than one possible answer, give all of them. a. Aa, b. Aa, c. aa, d. aa, e. Aa or AA
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This note was uploaded on 12/01/2010 for the course PSY 110 taught by Professor Winters during the Spring '08 term at University of Miami.

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BIL 151 Midterm exam_u4_key - BIL 151 Midterm exam Name_...

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