random samples

An experiment repeated under essentially homogeneous and similar conditions results in an outcome, which is unique or not unique but may be one of the several possible outcomes. When the result is unique then the experiment is called a deterministic experiment . Any experiment whose ..

Women constitute 24% of the science and engineering workforce. In a random sample of 500 science and engineering workforce, what is the probability that more than 130 are women? => 13.57% or 63.57% or 86.43% or 86.34%..

Out of a random sample of 150 people, 75 said they prefer rock music. How many people out of 600 could be predicted to prefer rock music? => 450 or 150 or 300 or 225..

The mean score on a standardized test is 100 with a standard deviation of 8. A random sample of 48 scores was found to have a mean of 98. Find the 95% confidence interval. => The interval is between 97.75 and 102.25 or The interval is between 1.15 and 100 or The interval is betw..

A machine produces bolts, of which 10% are defective. Find the probability that in a random sample of 400 bolts produced by the machine, between 35 and 45 will be defective. Assume a standard deviation of 6. => 0.5640 or 0.6405 or 0.4605 or 0.4560..

The percentage of households having internet connection is 45%. In a random sample of 500 households what is the probability that fewer than 200 will have internet onnections? => 9.1% or 9.01% or 1.09% or 1.9%..

Seventy-seven percent of students who have a computer at home have a webcam attached to it. In a random sample of 290 homes, what is the probability that more than 200 have a webcam attached to their computers? => 50.07% or 49.93% or 99.93% or 0.07%..

The mean score on a standardized test is 100 with a standard deviation of 8. A random sample of 48 scores was found to have a mean of 98. State the null hypothesis and alternative hypothesis. => H o : The mean score = 100, H a : The mean score ≠ 100 or H o : The mean score = ..

In a survey it was found that 20% of people living in a society watch channel A. If a random sample of 10 people are selected, then find the probability that at most 3 people in the sample watch channel A. => 0.878 or 0.2 or 0.79 or 0.59..

In a survey it was found that 20% of people living in a society watch channel A. If a random sample of 120 people is selected, then find the standard deviation of the number of people in the sample who watch channel A. => 24 or 19.2 or 4.38 or 96..