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In a random sample 25 days, Jon removes an average of 1588 pounds of waste per day. With a .05 level of significance, can we conclude that the population mean amount of crap Jon disposes of per day
Are the Smith third graders better at math than third graders throughout the state? Perform the correct statistical test, applying the eight steps of the hypothesis testing process and give examples
Six individuals, including A and B, take seats around a circular table in a completely random fashion. Suppose the seats are numbered 1, . . . , 6. Let X =A's seat number andY = B's seat number. If
A website manager has noticed that during the evening hours, about 3 people per minute check out from their shopping cart and make an online purchase. She believes that each purchase is independent
Suppose a machine's life time ( in years ) can be moldeled with an exponential distribution with rate of lambda = 1/4. What is the proability that the machine will last for at least 7 years, give that
A catalyst researcher states that the diameter, in microns, of the pores in a new product she has made have exponential distribution with parameter lambda= 0.25.
A major issue facing many states is whether to legalize casino gambling. Suppose the governor of one state believes that more than 55% of the state's registered voters would favor some form of legal
Using a level of significent a=.01 find the critical value explain whether or not you would accept the null hypothesis using both the critical value approach and the p-value approach and why.
What is your margin of error. What is the CI based on your margin of error. Suppose you wanted to develop a 95% Ci repeat parts a and b for a 95% Ci.
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
Fifty percent of households say that they would feel secure if they had $50,000 in savings. You randomly select 8 households andask them if they would feel secure if they had $50,000 in savings. Fin
A sample of 145 values is randomly selected from a population with mean equal to 43 and standard deviation equal to 19. (Give your answers correct to one decimal place.)
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
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: