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1. Using the hardness data from the odor data set odor .txt, do the following.
(a) Make a normal probability plot of the data.
(b) Do the data appear to be normally distributed? Explain.
2. Use the web site data webvisit .txt to do the following.
(a) Make a normal probability plot for the entire data set.
(b) Make normal probability plots for the two apparent groups in the data.
(c) Calculate the mean and standard deviation for each group.
(d) Assuming the group with the larger values is normally distributed, use your calculated mean and standard deviation to estimate the proportion of days that have more than 15,300 visits.
(e) Write a paragraph describing this set of data and the conclusions you have drawn from it.
1. Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a mean of 71 mph and a standard deviation of 8 mph.
zingos grocery store claims that customers spend an average of five minutes waiting for service at the stores deli
What values would be appropriate for the performance measures listed in the preceding problem for the case in which two tellers are available?
the population of completion times is 10.4 minutes, what is the minimum sample size needed for the managers to be 95% confident that their estimate is within 2.2 minutes of u?
Assume that the number of calories in 12-ounce soda cans is normally distributed. State the null and alternative hypotheses to test the manufacturer claim.
association we know association does not imply causation but what does this mean in your own words. provide and discuss
Over the past few years the percentage of students who leave Lakeland College at the endof the first year has increased. Last year Lakeland started a voluntary one-week orientationprogram to help first-year students adjust to campus life.
Using = .05, what is the critical value for the test statistic? (+ or -). State the rejection rule: Reject H0 if z is the lower critical value or the upper critical value.
question random sampling from two normal populations produced the following resultsx1
there are 5 men and 5 women and no 2 men or 2 women can sit next to each other
a panel of meteorological and civil engineers studying emergency evacuation plans for floridas gulf coast in the event
1. what information does calculating standard deviation provide? how is the z-score related to standard deviation?2.
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