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it is reported that 60% of a certain larg epopulation eat a certain brand of cereal. We randomly select 25 individuals from this population. Let X be teh number of people who eat this certain brand of cereal. Find the probability that 1) at most 10 of them eat this brand of cereal 2)more than 19 of them eat this brand of cereal 3) between 12 and 17 (inclusive) of them eat this brand of cereal? 4) find the mean and standard devation.
Lets say a business has account receivables per customer of $60.54. There was a random sampling of 19 accounts that revealed a sample mean of $73.55 and a sample standard deviation of $19.29.
For the new study, the estimate should be within 1% of the population proportion with a 90 percent confidence level. What is the necessary sample size?
A random sample of 20 single men was asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that none of the men will say yes?
In a survey of women in a certain country (ages 20-29), the mean height was 62.9 inches with a standard deviation of 2.81 inches.
If alpha level is changed from a = 0.05 to a = 0.01. What occurs to boundaries for critical region?
Provide an explanation of a chi-square test. Why would you use the chi-square statistic? What type of data is used with chi square analysis?
Calculate using excel analysis tools the significance of the difference between the proportion of men and women who support gun control with 74 men oppose.
Find out a 95 percent confidence interval for population mean.
Find the indicated percentage for the normally distributed variable. Round your answer to two decimal places, if necessary.
Construct a 95% confidence interval for the proportion of people disagreeing with the statement.
Construct a 98 percent confidence interval for the true proportion of ranch style homes. (Round your answers to 4 decimal places.)
How many participants need to be enrolled in each group to have 90% chance of detecting a significant difference using a two-sided test with a a= .05 if compliance is perfect?
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