Isds 361a study Study guides, Class notes & Summaries

A company has developed a new computer sound card whose average lifetime is unknown. In order to estimate this average, 200 sound cards are randomly selected from a large profuction line and tested; their average lifetime is found to be 5 years. The 200 sound cards represent a: - correct answer Sample In inferential statistics we seek to infer? - correct answer Population Parameters Statistics is ...

YESHIVA UNIVERSITY ISDS 361A FINAL EXAM 2024 WITH 100% CORRECT ANSWERS The collection of all units of interest in a particular study is called a. Sample b. Parameter c. Population d. Statistic - correct answer Population Suppose there is a dataset of baseball scores from several matches between the Seattle Mariners and Anaheim Angels. A statistician wants to summarize the data using graphical and numerical measures. What branch of Statistics will she need to use? a. Descriptive St...

ISDS 361A Exam 1 Questions and Answers 100% Pass Statistics a way of getting information -helps make valid decisions. Data the facts and figures collected, analyzed, and summarized for presentation and interpretation information Data converted into a meaningful and useful context business decisions these include strategic decisions (very important ones which can affect the overall success of the business) Business Analytics the scientific process of transforming data into in...

YESHIVA UNIVERSITY ISDS 361A FINAL EXAM 2024 WITH 100% CORRECT ANSWERS The collection of all units of interest in a particular study is called a. Sample b. Parameter c. Population d. Statistic - correct answer Population Suppose there is a dataset of baseball scores from several matches between the Seattle Mariners and Anaheim Angels. A statistician wants to summarize the data using graphical and numerical measures. What branch of Statistics will she need to use? a. Descriptive St...

CSUF ISDS 361A Final Conceptuals Questions and Answers Rated A the collection of all units of interest in a particular study is called? sample population parameter statistic population Suppose there is a dataset of baseball scores from several matches between the Seattle Mariners and Anaheim Angels. A statistician wants to summarize the data using graphical and numerical measures. What branch of Statistics will she need to use? Descriptive Statistics Inferential Statistics d...

ISDS 361A Exam 2 Study Guide with Questions and Answers Suppose a random sample of 18 uber drivers was taken, and the average age x̄ of these drivers was found to be 27.5 years. Construct a 99% confidence interval for the mean age (µ) of all drivers. Assume that the age of drivers is normally distributed with a population standard deviation (σ) of 2.3 years. The standard error (SE) of x̄ is: ANSWER 0.54 SE= sigma/sqrt (n) n 18 mean 27.5 sigma 2.3 Suppose a random sample of 18 ube...

A+ ISDS 361A Final Study Guide with Questions and Answers What is business statistics ANSWER Using STATISTICS *we draw conclusions* (extract useful information!) from data. With the extracted information, statistics help managers to make valid business decisions in response to such questions. What is business analytics ANSWER *Business Analytics* is defined as the scientific process of transforming data into insights for making better business decisions. Data, information, and decisi...

ISDS 361A Midterm 1 Exam with Latest Questions and Answers Descriptive statistics ANSWER numerical data used to measure and describe characteristics of groups. Includes measures of central tendency and measures of variation. Inferential statistics ANSWER numerical data that allow one to generalize- to infer from sample data the probability of something being true of a population Exit polls ANSWER A random sample of voters who exits the polling booth are asked for whom they voted. Pop...

ISDS 361A Test One with Questions and Answers A histogram is bi-modal. Then, ANSWER It has two modes A histogram is symmetric. Then, ANSWER It has no skewness A histogram of given data shows three clear peaks. Therefore, ANSWER There are three modes and there are three distinct groups in the data. A value has a z score of 3. This means that ANSWER The value is three standard deviations above the mean. A variable has a Q1 of 25 and a Q3 75. It also has a Q2 of 50. The IQR is ANSWER...