Tuesday
March 31, 2015

Homework Help: statistics

Posted by Asia on Wednesday, February 13, 2013 at 1:09pm.

1.A magazine reported that 6% of Americans read the news paper while driving. 100 drivers are selected at random, find the probability that exactly 25 of them say they read the newspaper while driving.(normal binomial formula to solve)

2. A survey of 30 adults found that the mean age of a person's primary vehicle is 5.6 years. Assuming that the standard deviation of the population is 0.8 years find best point estimate of the population is 0.8 years find the best point estimate of the population mean and the 99% confidence interval of that population mean.

3.ten randomly selected people were asked how long they slept at night. The mean time was 7.1 hours and the (sample) standard deviation was 0.78 hours. Find the 95% confidence interval of the mean time. Assume the variable is normally distributed.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Stat - 6% of american drivers read the newspaper while driving if 300 drivers ...
math Statistics - Suppose that 33 out of 300 selected american drivers read the ...
statistic - A survey of drivers in the United States found that 15% never use a ...
stastics - A survey of drivers in the United States found that 15% never use a ...
Statistics - According to a national poll conducted in 2010, seventy percent of ...
Statistics - *Give all probabilities to two decimal places. Three daily ...
Statistics - A research center claims that 50% of people believe that drivers ...
MATH PLS HELP - A research center claims that 50% of people believe that drivers...
English Check - Write a paragraph explaining why you think it is a suitable ...
Statisics - transportation officials tell us that 80% of drivers wear seat belt ...

Members