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Just before a referendum on a school budget, a local newspaper polls 385 voters to predict whether the budget will pass. Suppose the budget has the support of 53% of voters. What is the probability that the newspaper's sample will lead it to predict defeat? The probability is...........round to 2dp.
A Geiger-Muller tube and a scaler record approximately 50 counts per second due to a radioactive source. What is the shortest counting time required so that the percentage error of the counts will not exceed 1%?
He (given that) the true proportion of perfect condition items is only 80% what is the probability that the lot will not be shipped?
Also, 72 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employees who either have MBAs or are managers.
Test whether the mean weight is greater than 16 ounces with P-value approach.
A quality-control manager randomly selects 70 bottles of ketchup that were filled on S1 to assess the calibration of the filing machine. Determine the population study?
Many companies use sampling to determine whether a batch should be accepted. A (n, c) sampling plan consists of inspecting n randomly selected items from a batch and accepting the batch if c or fewer sampled items are defective.
If you know you need a sample size of 1,063 out of 300,000 to get a 95% confidence level and a 3% confidence interval what steps would you take to get a random sample?
Suppose that combined verbal and math SAT scores follow a normal distribution with mean 896 and standard deviation 174. Suppose further that Peter finds out that he scored in the top 3% of SAT scores. Determine how high Peter's score must have bee..
The Consumer Price Index (CPI) and the cost of a slice of pizza
In a standard test for reaction time, female candidates for flight school are found to have times that are normally distributed with a mean of 0.65 seconds and a standard deviation of 0.15 seconds.
An aptitude test has a mean of 220 and standard deviation of 10. find the corresponding z score for:
Using 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
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