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The 70-year long-term record for weather shows that for New York State, the annual precipitation has a mean of 39.81 inches and a standard deviation of 4.3 inches. The annual precipitation amount ha
The International Bottled Water Association says that Americans on the average drink 4.6 (8-oz.) servings of water a day. Assume that the number of 8-oz. servings of water is approximately normally
A facilities manager at a university reads in a research report that the mean amount of time spent in the shower by an adult is 5 minutes. He decides to collect data to see if the mean amount of tim
If 155 customers are randomly chosen one day, what is the probability that at least 27% of them bought more than one scoop of ice cream that day?
The number of pounds of steam used per month by a chemical plant is thought to be related to the average ambient temperature (in F) for that month. The past year's usage and temp are shown in the fo
A testing bureau reports that the mean for the population of Graduate Record Exam scores is 500 with a standard deviation of 90. The scores are normally distributed.
In the World Series of baseball, two teams A and B play a sequence of games against each other, and the first team that wins a total of four games becomes the winner of the World Series.
In a one-dimensional random walk with equal step lengths l along a gently inclined planed the probability of a step down-plane is 20% larger than for a step up-plane. Find the mean displacement from
Sketch the form of the probability distribution. Construct a table of probabilities P(n) for various numbers of heads n.
Given the heights of women are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. the famous rockette dancers at new yorks radio city music hall must have a heig
A sample of the sales at 50 Haute Dog restaurants is taken and the sample mean is $30,000 per day with a sample standard deviation of $2000. The population standard deviation is not known.
What is the probability that the average price per square foot for a home is greater than or equal to $90?
In simple linear regression through the origin (no intercept), does the line Yhat = (b)X necessarily pass through the point (Xbar, Ybar)? Please explain.
The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses 400 minutes
Give the manager a list of options within the budget and make a recommendation. Justify your answer. Note: don't just consider 95%.
The 70-year long-term record for weather shows that for New York State, the annual precipitation has a mean of 39.96 inches and a standard deviation of 4.56 inches. The annual precipitation amount h
In a library of 3000 songs, 50 are from a particular group. The library is shufled and played until the kth song from this group appears. Let Y denote the number of the song in the shufle where the
A repeated-measures study comparing two treatments with n = 4 participants produces MD = 2 and SS = 75 for the difference scores. What is the estimated standard error for the sample mean difference?
A simple random sample of 120 SAT scores has a mean of 1540. Assume that SAT scores have a population standard deviation of 300. Construct a 95% confidence interval estimate of the mean SAT score. (Sh
A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment. If all of the participants show improved performance of 8 o
Write a matlab program that can simulate picking skittles from a bag, 1 at a time without replacement. and shows the probability of picking a certain color from a bag of skittles(candy).
Suppose the average number of imperfections per sheet of this size is 3. What is the probability that a sheet of this size has no more than 2 imperfections?
A specific automotive part that a service station stocks in its inventory has an 8% chance of being defective. Suppose many cars come into the service station needing this part each week.
Find the area under the standard normal curve between z = -1.9 and z = 1.17, P(-1.9 < z < 1.17). (Give your answer correct to four decimal places.)
Below are the ages of people arrested on theft charges at a Mississippi county jail. For this sample, calculate the standard deviation: