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a survey 100 massachusetts residents were asked if they support casinos, 40 supported resort style casino in the state. a) what is the value of the sample proportion and standard diviation who support casinos in the sample? B) calculate a 95% confidence interval to estimate the population proportion of all residents who wupport casinos.
A consumer electronics firm has developed a new type of remote control button that is designed to operate before becoming intermittent.
Find the probability that the number who consider themselves baseball fans is (a) exactly eight, (b) at least eight, and (c) less than eight.
1) There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. a) Determine the standard error of the proportion.
The number who will go to the Ohio State University is a binomial random variable. What is the mean number of seniors going to the Ohio State University?
Company W is testing a sales software. Their salesforce of 500 people is divided into four regions: Northeast, Southeast, Central and West. Each sales person is expected to sell the same amount of products.
Is there a significant difference in mean fetal heart rates by position? Run the test at a 5% level of significance.
Find the margin of error for the 95% confidence interval used to estimate the population proportion. In a survey of 7100 T.V. viewers.
The rejection region for a two-tail test that uses the standard normal distribution is that area under the distribution lying
The probability will be .90 that the sample mean will not differ from the true mean by more than 20 percent of the std. deviation. How large a sample should he take?
NBC TV news, in a segment on the price of gasoline, reported last evening that the mean price nationwide is $1.50 per gallon for self-serve regular unleaded.
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
The standard error of the estimate can be used to determine a range within which the independent X variables can be predicted with varying degrees of statistical confidence based on the regression coefficients and the value for the Y variable.
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