Question
The average weight of 8 persons is increased by 2.5 kg,
when a person whose weight is 56 kg, is replaced by a new comer. Find the weight of new comer?Solution
Let N be the weight of the new comer. x be the average weight of persons. 
On solving, N = 76 kg Alternative Method After including the New comer total weight increased by = 2.5 × 8 = 20 kg i.e., the weight of the new comer = 56 + 20 = 76kg
Which of the following best defines the concept of the "Internet of Things" (IoT)?
Which schema in data warehousing uses a central fact table connected to dimension tables?
Data warehouse metadata primarily describes:
Which type of slowly changing dimension (SCD) preserves full history by adding a new row for each change and using effective date ranges?
Which of these is NOT an ensemble method?
In a snowflake schema of a data warehouse, which of the following consequences is most likely as a result of normalization of dimension tables?
Which OLAP operation involves focusing on a subset of dimensions (e.g., region=‘Asia’)?
ETL stands for:
Which SQL keyword is used to combine results from two queries and remove duplicates?
Data cleansing is primarily concerned with:
