what is the mode of the set of numbers 4 4 5 7 8

ATI TEAS 7

TEAS Math Practice Test

1. What is the mode of the set of numbers {4, 4, 5, 7, 8}?

A. 4
B. 5
C. 7
D. 8

Correct answer: A

Rationale: The mode of a set of numbers is the value that appears most frequently. In the given set {4, 4, 5, 7, 8}, the number 4 appears twice, which is more frequent than any other number. Therefore, the mode of this set is 4. Choice B, 5, is incorrect as it only appears once in the set. Choices C and D, 7 and 8 respectively, also appear only once each, making them less frequent than the number 4.

2. Given the double bar graph shown below, which of the following statements is true?

A. Group A is negatively skewed, while Group B is approximately normal.
B. Group A is positively skewed, while Group B is approximately normal.
C. Group A is approximately normal, while Group B is negatively skewed.
D. Group A is approximately normal, while Group B is positively skewed.

Correct answer: B

Rationale: The correct answer is B. In a double bar graph, Group A is positively skewed, meaning its data is clustered on the left and has a tail extending to the right. On the other hand, Group B displays a normal distribution where the data is evenly distributed around the mean. Choices A, C, and D are incorrect as they inaccurately describe the skewness and distribution of the data in Group A and Group B.

3. Sarah is hosting a brunch for a baby shower and knows that several of the guests are strict vegans. She wants to make sure she prepares certain foods correctly to ensure all her guests have something to eat. In particular, she is looking for recipes for banana bread and blueberry muffins. Which chapter of the cookbook should she consult?

A. Chapter I
B. Chapter II
C. Chapter IV
D. Chapter V

Correct answer: B

Rationale: Chapter II typically focuses on baking and sweet treats, which would likely include recipes for banana bread and blueberry muffins. Sarah should consult this chapter for vegan-friendly versions of these recipes that will cater to her strict vegan guests. Choice A, Chapter I, primarily covers yeast breads, not the specific recipes Sarah is looking for. Choice C, Chapter IV, focuses on elegant, easy entrees, which are not relevant to the sweet treats Sarah wants. Choice D, Chapter V, covers delicious desserts and drinks, but it does not specifically mention the items Sarah is interested in, making it less likely to contain the recipes she needs.

4. What is the difference between homologous chromosomes and sister chromatids?

A. Homologous chromosomes have the same genes but may have different alleles, while sister chromatids are identical copies of the same chromosome.
B. Homologous chromosomes are only found in diploid cells, while sister chromatids are found in both haploid and diploid cells.
C. Both homologous chromosomes and sister chromatids are genetically identical, but only sister chromatids separate during mitosis.
D. Both homologous chromosomes and sister chromatids can separate during mitosis, but only homologous chromosomes have different alleles.

Correct answer: A

Rationale: Rationale: - Homologous chromosomes are pairs of chromosomes that have the same genes in the same order, one from each parent. While they carry the same genes, they may have different alleles (variants of a gene). - Sister chromatids are exact copies of each other, formed during DNA replication. They are held together by a centromere and are produced during the S phase of the cell cycle. - During meiosis, homologous chromosomes pair up and exchange genetic material through crossing over, leading to genetic variation. Sister chromatids separate during mitosis to ensure each daughter cell receives an identical copy of the genetic material.

5. What is a mutation?

A. A change in the DNA sequence
B. A type of protein
C. A normal part of the DNA replication process
D. A harmless variation in DNA

Correct answer: A

Rationale: A mutation is defined as a change in the DNA sequence, which can occur due to various factors such as errors during DNA replication, exposure to mutagens (e.g., chemicals, radiation), or spontaneous changes. These alterations can lead to modifications in the genetic information carried by an organism, resulting in effects that can range from harmless variations to causing genetic disorders or diseases. Mutations play a crucial role in genetic diversity and evolution. Choices B, C, and D are incorrect as they do not accurately define what a mutation is. Option B is incorrect because mutations are not a type of protein but rather changes in DNA. Option C is incorrect because while mutations can occur during DNA replication, they are not considered a 'normal' part of the process as they can lead to genetic variations. Option D is incorrect because mutations can have a wide range of effects and are not always harmless variations.