The Following Table Gives the Scores of 30 Students in a Mathematics

question 103

Essay

The following table gives the scores of 30 students in a mathematics examination. Find the mean and the standard deviation of the distribution of the given data. Round the answers to the nearest hundredth, if necessary.
Hint: Assume that all scores lying within a group interval take the midvalue of that group. __________ __________

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Definitions:

Cross Selling

A sales strategy in which a seller encourages existing customers to buy additional or related products or services.

Cross-Buyer

A consumer who purchases multiple products or services from the same company, often encouraged through cross-promotion or bundling.

Discounted Prices

Reduced prices offered on goods or services, often as a promotion or to attract more customers.

Regular Basis

A consistent or recurring schedule or frequency at which a task or operation is carried out.