Question
Speed of current is equal to 20% of speed of boat in
still water. If the boat takes 4 hours to cover 120 km in still water, then find the time taken by the boat to cover 96 km in upstream.Solution
Speed of the boat in still water = 120 ÷ 4 = 30 km/h Speed of current = 30 × 0.20 = 6 km/h Therefore, upstream speed of the boat = 30 – 6 = 24 km/hr Required time taken = 96 ÷ 24 = 4 hours
Which of the following scenarios demonstrates an appropriate application of time series analysis?
In hypothesis testing, what does a p-value less than 0.05 typically indicate?
During the data analysis process, which step is crucial for ensuring data accuracy before any modeling or interpretation?
Which of the following best describes the difference between simple moving averages and exponential smoothing in forecasting?
Which of the following statements correctly differentiates between continuous and categorical data?
Which of the following best describes the main purpose of Exploratory Data Analysis (EDA) in data analysis?
Which of the following is the most appropriate method to handle missing data in a dataset for predictive modeling?
In R, which function is used to perform a t-test for comparing the means of two independent samples?
In a real-time video conferencing application, users report delays and poor video quality. Which QoS mechanism would most effectively address the issue?
Which of the following is the primary benefit of using APIs over web scraping for data collection from a website?
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