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1. A survey showed that 720 of the 1000 adult respondents believe in global warming.
(a) Construct a 90% confidence interval estimate of the proportion of adults believing in global warming. (Round the lower bound and upper bound of the confidence interval to three decimal places) Include description of how confidence interval was constructed.
(b) Describe the results of the survey in everyday language.
2. A city built a new parking garage in a business district. For a random sample of 64 days, daily fees collected averaged $2,000, with a standard deviation of $400.
(a) Construct a 90% confidence interval estimate of the mean daily parking fees collected. (Round the lower bound and upper bound of the confidence interval to two decimal places) Include description of how confidence interval was constructed.
(b) Describe the confidence interval in everyday language
What is the probability that someone selected at random will score 81 or lower and what percentage of all trainees will score between 60 and 75?
A variable contains seven categories. It is expected that data are uniformly distributed across these seven categories.
An individual is to select from among n alternatives in an attempt to obtain a particular one. This might be selection from answers on a multiple choice.
The company provide to ensure that an attempted call is blocked (because all circuits are busy) with probability less than 0.01? It is assumed that blocked calls are lost.
Give an example in health care management where you would use probability statistics to determine an outcome such as providing raises based on certain financial goals being met?
Can the college conclude that the students in the new program are significantly different from the freshman class? Use a two-tailed test with an alpha level of .05?
a man and a woman agree to meet at a cafe about noon. if the man arrives at a time uniformly distributed between 1140
Homeowners and businesses pay taxes on the assessed value of their property. As a result, property taxes can be a problem for elderly homeowners.
an economist wanted to analyze the relationship between the speed of a car x and its gas mileage y. as an experiment a
suppose we know grades on final exam in a statistic course are normally distributed with a mean of 72 and standard
in a game you pay 2 to play per game. it is possible to win 2 4 or 8 with respective probabilities 75216 20216 1216.a.
It is known that a healthy human body has an average temperature of 98.6?F, with a standard deviation of 0.95?F. Sixty healthy humans are selected at random. What is the probability that their temperatures average at least 99.1?F?
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