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In a population, 11% of people are left handed. In a simple random sample of 160 people selected from this population the proportion of left handers is 0.10. What is the number of left handers in the sample and what notation is given to that number? What is the values of p and ^p?
According to the empirical rule, if the data from a "bell-shaped" normal distribution ______ percent of the observation will be contained between 2 standard deviations below the mean and 2 standard deviations above the mean.
A state transportation official claims that the mean waiting time at exit booths from a toll road near the capitol is no more than .40 minutes. for a sample of 35 motorists exiting the toll road, it was found that the mean waiting time was .46 min..
10 cartons are taken at random from an automatic filling machine.The mean net weight of the carton is11.8 kg and standard deviation of 0.15kg. Does the sample mean differ significantly from the intended weight of 12kgs?
Students in the social work course received the following course grades. Create a frequency distribution for this data. Compute the mean. Determine the median.
Identify the population parameter of interest in the survey. Give a point estimate of the population parameter. Set up H0 and Ha for testing whether the true percentage of TV viewers who find cable news to be better quality than network news differs..
Explain the relationship between total gross and opening gross total gross and number of theatres total gross and week in top 60.
A certain pond to check if they are significantly larger than the mean stated above. Is the mean of the sample larger population of this fish? use either L=1% or L=5%.
How many seats sould be in the non-smoking area in order to be very sure (mean+3StandardDeviation) of having enough seating there?
Be sure to specifically identify the statistical formulas and what additional data you would need to determine your estimate(s).
Ms Lisa is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample info:
Let T have the exponential distribution with parameter lambda, and let Y=Sqroot(T).
Tompkins Associates reports that the mean clear height for a Class A warehouse in the Unites States is 22 feet. Suppose clear heights are normally distributed and that the standard deviation is 4 feet.
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