# STATS

posted by .

In a certain store, there is a .05 probability that the scanned price in the bar code scanner will not match the advertised price. The cashier scans 820 items.

a) What is the expected number of mismatches and standard deviation? (Round your expected number of mismatches to 1 decimal place and standard deviation answer to 4 decimal places.)

b) What is the probability of at least 22 mismatches? (Round your answer to 4 decimal places.)

c) What is the probability of more than 32 mismatches? (Round your answer to 4 decimal places.)

• STATS -

Please note that we do not do homework assignments.

Please stop dumping these questions here unless you show us some of your own effort.

## Similar Questions

1. ### 7th grade math Ms. Sue last two questions thanks

15. In Store A, a book that regularly sells for \$24.99 is on sale at 15% off. In Store B, the same book regularly sells for \$27.99 and is on sale at 25% off. Which store sells the book for the lower sale price?
2. ### statistics

Accuracy of price scanners at Wal-Mart. The National Institute for Standards and Technology (NIST) mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate …
3. ### statistics

Accuracy of price scanners at Wal-Mart. The National Institute for Standards and Technology (NIST) mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate …
4. ### Help with statistics

In a study of store checkout scanning systems, samples of purchases were used to compare the scanned prices to the posted prices. The accompanying table summarizes results for a sample of 819 items. When stores use scanners to check …

: Is Scanner Accuracy the Same for Specials?

Is Scanner Accuracy the Same for Specials?
7. ### Statistics

In the Federal Trade Commission (FTC) \Price Check" study of electronic checkout scanners, the FTC inspected 1,669 scanners at retail stores and supermarkets by scanning a sample of items at each store and determining if the scanned …
8. ### pre-calculus

It has been discovered in a certain state that the relationship between the number of snow shovels demanded varies linearly with its price. When the price per item was \$ 38 ,2200 items were demanded; When the price was \$ 49 , 2125 …
9. ### math

t has been discovered in a certain state that the relationship between the number of snow shovels demanded varies linearly with its price. When the price per item was \$ 38 ,2200 items were demanded; When the price was \$ 49 , 2125 items …
10. ### math

A student buys a pair of jean trousers at a 19% discount on the advertised price.if she wants to make a mark-up 20% after allowing a discount of 10%,by what percent should her marked price be greater than the original advertised price?

More Similar Questions