Printing Statistics Midterm Exam

Printing Statistics Midterm Exam. Determine whether the numerical value is a parameter or a statistic. Explain your reasoning. 1) (3 pts) The average salary of all assembly-line employees at a certain car manufacturer is $44,000. A) Parameter B) Statistic A parameter is a fixed metric that characterizes the whole population. The automobile manufacturer has access to all of the employees' salaries in the given example, thus they are all included in the average. It is a measure of an entire population's characteristics based on all of the constituents in the population. The numerical amount of $44000 is determined by the total number of assembly line personnel, hence it is a parameter. Identify whether the statement describes inferential statistics or descriptive statistics. 1) 2) (3 pts) The chances of winning the California Lottery are one chance in twenty-two million. A) inferential statistics B) descriptive statistics The chances of winning the California Lottery are one chance in twenty-two million. This statement describes inferential statistics. Reason is On the basis of the sample observation, we infer about the population is called inferential statistics. Determine whether the data are qualitative or quantitative. 2) 3) (3 pts) The number of complaint letters received by the United States Postal Service in a given day A) qualitative B) quantitative This is quantitative as it is numerical data. Identify the data set's level of measurement. 3) 4) (3 pts) The amounts of fat (in grams) in 37 cookies A) interval B) ratio C) ordinal D) nominal 4) 2 A ratio scale is a quantitative form of scale that allows for the comparison of intervals and differences. The most popular ratio scale examples include height, weight, money, age, and so on. 5) (3 pts) numbers on the shirts of a girl's soccer team A) ratio B) nominal C) ordinal D) interval The numbers on the shirts of a girl's soccer team will be like 01,02,38,40,51,99, etc. Determine whether the study is an observational study or an experiment. 5) 6) (3 pts) The personnel director at a large company would like to determine whether the company cafeteria is widely used by employees. She calls each employee and asks them whether they usually bring their own lunch, eat at the company cafeteria, or go out for lunch. A) observational study B) experiment Observational studies are ones in which the investigator does not intervene with study participants but instead observes natural correlations between causes and outcomes. Identify the sampling technique used. 6) 7) (3 pts) A community college student interviews everyone in a particular statistics class to determine the percentage of students that own a car. A) systematic B) random C) cluster D) convenience E) stratified In convenience sampling method interviews everyone in a statistics class to determine the percentage of students that own a car. 7) 3 8) (3 pts) A researcher randomly selected 70 of the nation's middle schools and interviewed all of the teachers at each school. A) systematic B) random C) convenience D) stratified E) cluster Cluster sampling divides the entire population into numerous clusters, which in this case are the schools. Then, at random, certain clusters are picked, and all individuals in the chosen clusters are included in the sample. The number of clusters chosen in this case is 70. The instructors from all 70 clusters are then interviewed. 8) 9) (3 pts) Classify the events as dependent or independent. The events of getting two aces when two cards are drawn from a deck of playing cards and the first card is not replaced before the second card is drawn. A) dependent B) independent The dependent event, as cards are drowning without replacement. Because second drown is dependent on what we have already chosen at 1st choice. 9) 10) (3 pts) Classify the statement as an example of classical probability, empirical probability, or 10) subjective probability. The probability that a newborn baby is a boy is . A) classical probability B) subjective probability C) empirical probability This is a classical probability. We know that the theoretical probability of a child being either male or female is 0.5 (at least roughly, since our assumption is that the infant would be either male or female, which doesn't hurt the approximation). 11) (3 pts) Decide if the events A and B are mutually exclusive or not mutually exclusive. A person is selected at random. We offer online tutoring, help with assignments and essay writing for all Majors with a guaranteed pass. For assistance Contact Tutor Lucas: +1 (775) 766-9089 /