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The personnel manager for a large corporation feels that there may be a relationship between absenteeism. Determine the regression equation using number of days absent as the dependent variable.
Suppose that a classroom has 10 light bulbs. The probability that each individual light bulb works is 0.6. Suppose that each light bulb works independently of the other light bulbs. What is the prob
The telephone sample of 20 homes indicated that the customers are paying X (bar) = $165.4 and s = $22.20 for a yearly contract. Using the 0.05 level of significance, is there evidence that the populat
The mean score of a competency test is 77, with a standard deviation of 4. Use the Empirical Rule to find the percentage of scores between 69 and 85.
if we know nothing of the distribution of the diameters, then what percent of the diameters would measure between 2.95 3.05?
What is the decision based on each of the following criteria? Show work in making the decision for each criterion EMV approach
A golf club manufacturer claims that the median length of a drive using its driver is 250 yards. A consumer group disputes the claim, indicating that the median will be considerably less. A sample o
How many of each item should it produce in order to maximize profits while meeting all necessary constraints? Give the LP Model and use both the graphical method and Excel to find the optimal soluti
The one time fling! Have you ever purchased an article ofclothing (dress, sports jacket, etc.) worn the item once to aparty, and then returned the purchase? This is called a one timefling. About 10%
Determine the upper control limit (UCL) and lower control limit (LCL) for an X-Bar chart if six samples of subgroup size 5 (n=5) were collected.
The Number Who Attended Commencement in 1981 is 99 and in 2001 is 458. The number who Finished in 4 years for 1981 is 269 and for 2001 is 325. The Number Who Received financial aid in 1981 is 159 an
Suppose the following statistics were calculated from data gathered from a randomized block experiment. Can we conclude from these statistics that the treatment means differ? (use α =.01)
A car arriving at the fork chooses Main Street with probability 3/4 and Willow Street with probability 1/4. Let X be the random variable which counts the number of cars that, in a given unit of time
The average math SAT score is 500 with a standard deviation of 100. A particular high school claims that its students have unusually high math SAT scores. A random sample of 50 students from this sc
In a study designed to gauge married women's participation in the workplace today. What's the probability that this randomly selected woman has at least one child?
students had an average test score of 85, with a standard deviation of 15. Test the hypothesis that Mrs. Smith and Mrs. Jones are equally effective teachers. Use a 0.10 level of significance. (Assum
In a population of exam scores a scores if x=88 corresponds to z=+2.00 and a score of x=79 and corresponds to z=-1.00 find the mean and standard deviation for the population.
if the politician's claim is correct what is the approximate probability that you will observe 9 or fewer accidents with a teenager behind the wheel in a randon sample of 67 records of car accidents
What is the minimum sample size needed in order for you to be confident that your estimate is within of ? Use the value for the population standard deviation of scores on this subsection.
a statistics professor plans class carefully so that the length of his classes are uniformly distributed between 50 and 52 minutes. What is the probability that the class will be less than 50.25 min
Consider a multinomial experiment involving n = 300 and k = 5 cells. The observed frequencies resulting from the experiment are shown in the accompanying table. Test the hypothesis at the 1% signifi
Among mildly obese people minsutes of activity varied accodring to the N(373,67) distribution. Minutes of activity for lean people gad the N(526, 107). Withink what limits do the active minutes for
A statistics practitioner conducted a two-factor analysis of variance experiment with a =4, b = 3, and r = 8. Test at the 5% significance level to determine whether differences exist between the
A)On a very hot summer day, 5 percent of the production employees at Midland States Steel are absent from work. The production employees are randomly selected for a special in-depth study on absente