Lohia Group Interview Questions and Answers

Quality control is the process of ensuring that products or services meet the desired level of quality.

• It involves inspecting and testing products or services to identify defects or issues.

• It helps to prevent defects and improve overall quality.

• It can be used in various industries such as manufacturing, healthcare, and software development.

• Examples include checking the accuracy of medical test results, testing the durability of a product, and reviewing code for errors.

• Quality...read more

Control charts are statistical tools used to monitor and control a process over time.

• They help identify if a process is stable or unstable.

• They plot data points over time and calculate control limits.

• They can be used to detect and correct problems before they become serious.

• Examples include X-bar and R charts, p-charts, and c-charts.

Standard deviation is a measure of the amount of variation or dispersion of a set of values from the mean.

• It is a statistical measure of variability.

• It measures how spread out the data is from the mean.

• It is calculated by taking the square root of the variance.

• It is commonly used in quality control to ensure consistency and accuracy of products.

• For example, if the standard deviation of a product's weight is high, it means that the weights of the products are varying widely fr...read more

Correlation is a statistical measure that shows the relationship between two variables.

• Correlation measures the strength and direction of the relationship between two variables.

• It ranges from -1 to 1, where -1 indicates a perfect negative correlation, 0 indicates no correlation, and 1 indicates a perfect positive correlation.

• Correlation does not imply causation.

• For example, there may be a strong correlation between ice cream sales and crime rates, but that does not mean that ...read more

Standard deviation formula measures the amount of variation or dispersion of a set of data values.

• The formula is: square root of the sum of the squared differences between each data point and the mean, divided by the number of data points minus one.

• It is used to determine the spread of data in a sample or population.

• A high standard deviation indicates that the data points are spread out over a large range, while a low standard deviation indicates that the data points are clus...read more

Binomial distribution formula is used to calculate the probability of a certain number of successes in a fixed number of trials.

• The formula is P(x) = (nCx) * p^x * (1-p)^(n-x)

• n is the total number of trials, x is the number of successes, p is the probability of success in a single trial

• The formula can be used in various fields such as finance, biology, and engineering

• Example: The probability of getting 3 heads in 5 coin tosses with a fair coin is P(3) = (5C3) * 0.5^3 * 0.5^2 ...read more