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What is the margin of error. What is the ci interval based on your margin of error. If you wanted to ensure a margin of error of no more than 15 customers what sample size do you need?
To make sure that this is the correct assumption, he has decided to conduct a test by randomly sampling 60 bills and recording the actual tips. What is the null and alternative Hypothesis?
What proportion of the following sample of ten measurements lies within 2 standard deviation of the mean?
The following are the heights, in inches, of ten middle school basketball players. Determine the data range for the following data set. Also, construct a frequency table for the data set, use a clas
To test this at a significance level of 0.05, a random sample of n = 20 students was selected and the following values were observed: 26 15 10 40 10 20 30 36 40 0 5 10 20 32 16 12 40 36 10 0 Based o
Find the indicated probabilities using the geometric distribution or Poisson distribution. Then determine if the events are unusual. If convenient, use a Poisson probability table tor technology to
To do this, the aides have hired a consulting firm to survey a simple random sample of 300 voters in the state. Of these 300 voters, 175 actually favored legalized gambling. State the appropriate nu
One environmental group did a study of recycling habits in a California community. It found that 74% of the aluminum cans sold in the area were recycled. (Round your answers to four decimal places.)
A manufacturer has designed a process to produce pipes that are 10 feet long. The distribution of the pipe length, however, is actually Uniform on the interval 10 feet to 10.57 feet. Assume that the
What is the expected length of a single pipe? Give your answer to three decimal places. What is the expected total length of the two pieces of pipe? Give your answer to three decimal places.
For the following hypothesis test Ho: u <= 45, ha: u > 45 alpha = 0.02. With n = 80, ? = 9, and = 47.1, state the calculated value of the test statistic z.
Calculate the probability of a Type II error if the true mean is 14%. Assume that the population standard deviation is known to be 2% and that a significance level equal to 0.01 will be used to cond
A biologist is investigating the effect of potential plant hormones by treating 20 stem segments. At the end of the observation period, he computes the following length averages:
Assuming that the hypothesis test is to be performed using 0.10 level of significance and a random sample of n = 64 bottles, how large could the sample mean be before they would reject the null hypo
What is the shortest time spent waiting for a heart that would still place a patient in the top 5% of waiting times? What is the longest time spent waiting for a heart that would still place a patient
Compute the power of the hypothesis test to reject the null hypothesis if the true average starting salary is only $47,000. Assume that the population standard deviation is known to be $4,600 and th
Suppose that the American Society for Certified Public Accountants planned to test this claim by randomly sampling 200 accountants who graduated in 2008. State the appropriate null and alternative
Suppose you were given the task of estimating the proportion of drivers in Troy, AL who text while they drive. Discuss what factors you must consider and how you would accomplish this.
A student takes a calculus midterm and a history midterm. The mean and standard deviation on the calculus midterm are 51 and 17 points while they are 70 and 31 on the history midterm. Suppose she ge
The mean and standard deviation on a calculus mid term are 55 and 16 points while they are 65 and 22 on the final. If a student gets 94 points on the midterm, what is the comparable grade on the fin
The average customer previosly spent $9.01 (u=9.01) with a population standard deviation of $1.35 o=1.35 and you would like to know if that has increased as a result of your training program. What
The mean and standard deviation on a calculus mid term are 61 and 13 points while they are 65 and 19 on the final. If a student gets 77 points on the midterm, what is the comparable grade on the fin
For the following z-test statistic, compute the p-value assuming that the hypothesis test is a one-tailed test: z = 2.09.
If the linear correlation between two variables is negative, what can be said about the slope of the regression line?
Conduct the appropriate t-test, at a = .05, to determine whether dragons eat fewerknights and princesses when they have consumed Merlin's diet pills prior to a meal.