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What is the percentage of the total area under the normal curve within plus and minus 2.1 standard deviations of the mean?
48.21%
96.42%
32.14%
19.28%
in a survey of 500 residents 300 were opossed to the use of the photo-cop for issuing traffic tickets. find a 95
Is 0.21, the probability that his wife will vote in the referendum is0.28, and the probability that both the husband and wife will voteis 0.15. What is the probability that: at least one member of a married couple will vote?
A random sample of 100 oranges is gathered and the mean diameter obtained was 5.12. If another sample of 100 is taken, what is the possibility that its sample mean will be greater than 5.12 inches.
suppose you are tasked to develop a section of the survey measuring home mortgage debt in which survey respondents are
Mauricio Cruz, a wine merchant for Cruz's Spirits Emporium, wants to determine if the average price of imported wine is less than the average price of domestic wine. The data obtained is shown in the table below.
Conduct the test at the 0.05 level of significance whether the modification actually increased the life of the AAA battery. What was their decision rule?
q1. in a recent study of 154 households 54 had air conditioning. find the 95 confidence interval of the true
a researcher has a report for an experiment with a sample size equal to 100 the resulting 95 prediction interval was to
in the telephone survey technique introduced in exercise 6.5 what is the probability of two or fewer successful calls
New soft drink is being market tested. A sample of 400 individuals participated in the taste test and 100 indicated that they like the taste. Set up the null and the alternative hypotheses.
The first unit produced after the calibration effort to be found to be defective. What is the probability that machine is in adjustment?
Select another sample of 30 scores from the same population, what measure of central tendency is likely to vary least between your first and second sample?
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