Question

Melissa’s birthday is next week and she has been receiving cards in the mail with different amounts of money. She has received 5 cards with the following amounts: $10, $20, $ 25, $30, $40. If Melissa receives one more card in the mail with $25, which of the following will happen?

The standard deviation will

decrease.
The mean will

Select a Value

Answer 1

The standard deviation of the cards received so far is about 11.2. With the additional card, it becomes 10.

The standard deviation will decrease.


The mean of the cards received so far is 25. With the addition card, it remains 25.

The mean will remain the same at 25.