# intro to statisics

posted by .

78% of US homes have a telephone answering device. In a random sample of 250 homes, what is the probability that fewer than 50 do not have a telephone answering device. Courtney, 2nd yr college

## Similar Questions

1. ### math

If 90% of the households in a certain region have an answering machines and 50% have both answering machines and call waiting, what is the probability that a household chosen at random and found to have an answering machine also has …
2. ### intro to probability

In a study of particulate pollution in air samples over a smokestack, X1 represents the amount of pollant per sample when a cleaning device is not operating, and X2 represents the amount per sample when the cleaning device is operating. …
3. ### Statistics

A set of telephone lines is to be installed so as to connect between town A and town B. The town A has 2000 telephones. If each of the telephone users of A were to be guaranteed instant access to make calls to B, 2000 telephone lines …
4. ### math (unanswered, previously posted)

A set of telephone lines is to be installed so as to connect between town A and town B. The town A has 2000 telephones. If each of the telephone users of A were to be guaranteed instant access to make calls to B, 2000 telephone lines …
5. ### college,stats/ PLZ HELP:( need it within nxt 6hrs

Among Canadian households, 24% have telephone answering machines. If a telemarketing company contacts 2500 households find the probability that between 625 and 650 households, inclusive, have answering machines.
6. ### Engineering

We estimate that today c.89% of homes can readily get a 2Mbps (or higher) broadband service from cable, ADSL or wireless means. This means that c.11%, or about 2.75m, homes cannot readily get a 2 Mbps (or higher) broadband service …
7. ### statistics

78% of us homes have a telephone. In a random sample 250 homes, what is the probablity that fewer than 50 do not have telephone
8. ### Psychology Statistics

Determine whether the numerical value is a parameter or a statistic?
9. ### statistics

39% of households have some sort of high speed internet service. 15 homes are selected at random. the probability that 5 homes will have high speed service is?
10. ### statistics

About 24% of all homes purchased on 2004 were considered investment properties. a random sample of 800 homes sold in 2004 is obtained. What is the probability that at most 200 homes are used as an investment property?

More Similar Questions