Questions from Statistics

Q: Margin of error, E = 1.5 meters; sample

Margin of error, E = 1.5 meters; sample standard deviation, s = 30.6 meters

Q: Margin of error, E = 8.5 grams; sample

Margin of error, E = 8.5 grams; sample standard deviation, s = 68.5 grams

Q: Margin of error, E = 20.3 cm; sample

Margin of error, E = 20.3 cm; sample standard deviation, s = 321.0 cm

Q: Nielsen Media Research wishes to estimate the mean number of hours that

Nielsen Media Research wishes to estimate the mean number of hours that high school students spend watching TV on a weekday. A margin of error of E = 0.25 hour is desired. Past studies suggest that a...

Q: A government survey is to be conducted to estimate the mean price

A government survey is to be conducted to estimate the mean price of houses in a large metropolitan area; it is designed to have a margin of error of E = $10,000. Pilot studies suggest that the popula...

Q: a. What percentage of students does not party at least 3

a. What percentage of students does not party at least 3 hours per week? b. The graphic shows two different percentages for categories that mention relevance of coursework. Is this a contradiction? Wh...

Q: The Wechsler IQ test is designed so that the mean is 100

The Wechsler IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population of normal adults. Find the minimum sample size necessary to estimate the mean IQ score of C...

Q: An economist wants to estimate mean annual income from the first year

An economist wants to estimate mean annual income from the first year of work for college graduates who have had the profound wisdom to take a statistics course. How many such incomes must she find if...

Q: You want to estimate the mean weight of quarters in circulation.

You want to estimate the mean weight of quarters in circulation. A sample of 40 quarters has a mean weight of 5.639 grams and a standard deviation of 0.062 gram. Use a single value to estimate the mea...

Q: A marketing expert for MTV is planning a survey in which 500

A marketing expert for MTV is planning a survey in which 500 people will be randomly selected from each age group: 10–19, 20–29, and so on.