Problem based on normal approximation

Reference no: EM1319838

Question: Round the standard deviation & z value to two decimal places. Use a table for standard normal distribution & give the corresponding areas to four decimal places. Give your answer as a % rounded to two decimal places. 77% of L'.S. homes have a telephone answering device. In a random sample of 330 homes, what is the probability that more than 70 do not have an answering device? The probability that more than 70 do not have an answering device.

Reference no: EM1319838

Questions Cloud

Find the probability of hours they watch television : F ind the probability that the mean of the number of hours they watch television will be greater than 27.3 hours. Give your answer to 2 decimal places.

Compute the probability based on the distribution : Compute the probability based on the distribution.

Find the probability on normal distribution : Find the probability that a randomly selected teacher makes less than USD 40156 a year? Round your final answer as a percent rounded to two decimal places.

Find the probability of 14 : Find the probability of 14 or more widowed people in a random sample of 290 bowling league members?

Problem based on normal approximation : In a random sample of 330 homes, what is the probability that more than 70 do not have an answering device? The probability that more than 70 do not have an answering device

Find the sample mean : ow large a sample must be selected if he wants to be 99 percent confident of finding whether the true mean differs from the sample mean by 2.5 hours?

Determine the mean oil production with 95 percent confidence : Determine the mean oil production with 95 percent confidence

Find the confidence interval for the population mean : Find the confidence interval for the population mean

Make an interval estimate of the mean : Make an interval estimate of the mean so that you are 90 percent confidant that the true mean is in your interval.

User Account

All Pages