Find probability that at least fourty of randomly selected

Assignment Help Applied Statistics

Reference no: EM13911605

When a store uses electronic article surveillance (EAS) to combat shoplifting, it places a small sensor on each item of merchandise. When an item is legitimately purchased, the sales clerk is supposed to remove the sensor to prevent an alarm from sounding as the customer exits the store. In an actual survey of 250 consumers, 40 said that if they were to set off an EAS alarm because store personnel (mistakenly) failed to deactivate merchandise leaving the store, they would never shop at that store again. A company marketing the alarm system claimed that no more than 5 percent of all consumers would say that they would never shop at that store again if they were subjected to a false alarm.

a. Assuming that the company's claim is valid, use the normal approximation to the binomial to calculate the probability that at least 40 of the 250 randomly selected consumers would say that they would never shop at that store again if they were subjected to a false alarm.

b. Do you believe the company's claim based on your answer to part a? Explain.

Reference no: EM13911605

Questions Cloud

What was the stock price the split : Loud Music Inc recently completed a 3-for-1 stock split. Prior to the split, its stock sold for $120 per share. What was the stock price following the split?

The plaintiffs annual salary for the last two years : You are serving on a jury. A plaintiff is suing the city for injuries sustained after a freak street sweeper accident. In the trial, doctors testified that it will be five years before the plaintiff is able to return to work. The jury has already dec..

Analyze the types of securities and financial markets : Analyze the types of securities and financial markets and propose a new type of market that would be better than anything in existence today. Please be as creative as you like.

The machine is expected to have a four year useful life : Porter, Inc., acquired a machine that cost $360,000 on October 1, 2013.

Find probability that at least fourty of randomly selected : Assuming that the company's claim is valid, use the normal approximation to the binomial to calculate the probability that at least 40 of the 250 randomly selected consumers would say that they would never shop at that store again if they were sub..

Calculate the condence interval : You have ordered 10 bags of cement, which are supposed to weigh 94 kg each. The average weight of the 10 bags is 93.5 kg. Calculate the condence interval in R, and write the code you used

Temperature of the water and aluminum : A 20.0 gram aluminum ball (specific heat 0.90 J g-1 °C-1) at 80 °C was placed in 50 grams of water initially at 22.9 °C. What is the final temperature of the water and aluminum assuming no heat was lost during the energy exchange.

Copper to form a precipitate : The chemist then initiates a reaction in the solution that causes all of the copper to form a precipitate (form a solid) that settles to the bottom of the container. What should be the mass (in grams) of the copper precipitate?

Dentify depreciation methods used moyle company : dentify depreciation methods used Moyle Co. acquired a machine on January 1, 2013, at a cost of $800,000. The machine is expected to have a five year useful life, with a salvage value of $50,000.

User Account

All Pages