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Suppose that the national average weekly grocery bill for a four-person family is $100. Using the p-value approach, what would you conclude?
In doing market research for candy company, John find out that 1053 of 1220 randomly chosen person like dark chocolate. Based this result, determine a 90% lower bound estimate of the percentage of a
What is the critical F value for a sample of four observations in the numerator and seven in the denominator? Use a one-tailed test and the .01 significance level.
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.
Throughout October the average temperature of Whitman Lake is 53.2 and standard deviation is 2.3. Suppose the variable is normally distributed. For randomly chosen day in October, determine the prob
Determine the probability that the serum cholesterol level of a man in the group is between 200 and 250? Determine the probability that the average serum cholesterol level of the group is between 200
Determine the normal approximation for the binomial probability that x = 5, where n = 14 and p = 0.5. Compare this probability to the value of P(x=5) found in Table 2 of Appendix B in your textbook.
The sampling distribution of the sample mean for samples of size 49 is approximately normally distributed with mean=? and standard deviation=?
Starting salaries of 145 college graduates who have taken the statistics course have mean of $43,608 and standard deviation of $8,347.
For 30 randomly selected Rolling Stones concerts, mean gross earnings is 2.03 million dollars. Supposing a population standard deviation gross earnings of 0.51 million dollars, obtain a 99% confiden
Employ the confidence level and sample data to determine a confidence interval for determining the population (mean symbol).
Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.
The average number of years served by those 35 justices was 13.8. If the standard deviation of the entire population is 7.3 years, determine the 95% confidence interval for the average number of yea
Employ the given degree of confidence and sample data to develop a confidence interval for the population proportion p. A survey of 865 voters in one state reveals that 408 favor approval of an issue
Determine the minimum sample size you should use to assure that your estimate of p will be within the required margin of error around the population p.
Employ the given degree of confidence and sample data to construct a confidence interval for the population proportion p.
Determine the 95% confidence interval for the variance of the heights of maple trees if a sample of 26 trees has a standard deviation of 10.2 feet.
A report states that 46% of home owners have a vegetable garden. How large a sample is needed to determine the true proportion of home owners who have vegetable gardens to in four percentage points
In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 seconds or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 seconds or less.
Determine the 99% limit for population proportion of printers which are employed in small businesses.
A random sample of 100 voters found that 44% were going to vote for a certain candidate. Find out the 99% limit for the population proportion of voters who will vote for that candidate.
Find out the minimum sample size vital to be at least 95% confident that the tensile strengths obtained in sample will cover 90% of tensile strengths produced in new manufacturing process.
A study of elephants is conducted to find out the average weight of certain subspecies of elephants. The standard deviation for the population is 500 pounds. At 80% level, how many elephants require
If a population has a standard deviation of 18, Determine the minimum number of samples that need to be averaged in order to be 95% confident that the average of the means is within 2 of the true me