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The following data represents the mean August temperature ( Fahrenheit) in 20 us cities: 64, 64, 68, 69, 70, 71, 71, 72, 74, 75,76,76,76, 77, 81, 82, 82, 83, 85, 92 . construct a split-stem polt.
The daily milk production of cows is normally distributed with a mean of about 35 kg/day and a standard deviation of 7 kg/day. What is the 10th percentile (in kg) of the daily milk production appro
What is the probability that in the sample fewer than 35% are willing to spend extra for products and services from socially responsible companies?
The entrance exam at a university is normally distributed with a mean of 520 and a standard deviation of 75. If only the top 10% of hte students are accepted, approximately, what is the lowest scor
A team of two people to be selected out of 5 men and 5 women. A random variable X is defined to be the number of men selected. Find the standard deviation.
The general manager of a luxury hotel decides the quality of housekeeping by inspecting 15 rooms. consider that the hotel offers economy and business-class roomsas well as suites. Slect the best met
A random variable X is defined by assigning to each outcome the total number of red balls drawn. Find the expected value of X.
A business magazine mailed a questionaire to the human resource directors of all the Fortune 500 companies, and received respones from 32% of them. Those responding reported that they did not find t
Construct a 95% confidence interval for the standard deviation of the number of hours this firm's employees spend on work-related activities in a typical week.
To investigate the fluid mechanics of swimming, twenty swimmers each swam a specified distance in a water-filled pool and in a pool where the water was thickened with food grade guar gum to create a
Test the given claim using the traditional method of hypothesis testing. Assume that the sample has been randomly selected from a population with a normal distribution.
Let x have Normal distribution with mean 11.3 and standard deviation 5.7. Find the cumulative probability of 9.31 or smaller . P(x <= 9="" 31="" p="">
Below are some possible methods for picking 100 students out of the 2000 students registered at the school. For each, indicate what kind of sampling strategy is used.
The whitness of their teeth was again measured, and the result of the two measurements were compared. Which of the following statements is true?
Identify the data set's level of measurements. (Levels of measurements ; Nomial: names, labels, categories ect. Ordinal: Can be arranged in an order)
The level of cleaning for each shirt is recorded on a scale from one to ten; the person evaluating the cleaning level is unaware of the treatment used on the shirt. The average cleaning level for ea
The best leadership theories to describe and explain effective leadership in teams with interactive members are
A engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 181 lb. The new population of pilots has normally distributed weights
A sample of 100 people is classified by gender (male/female) and by whether or not they are registered voters. The sample consists of 80 females and 20 males, and has a total of 60 registered voter
Two boxes (A) and (B). Box (A) contains 4 red balls and 5 white balls, box (B) contains 2 red balls and 3 white balls. An experiment consists of drawing a ball from box (A) and placing it in box (B)
Two students, Jen and John, are registered for the same class and attend independently to each other, Jen 96% of the time and John 88% of the time. What is the probability that on any given day
The dealer spins the wheel and at the same time rolls a small ball along the wheel in the opposite direction. The wheel is carefully balanced so that the ball is equally likely to land in any slot w
The man M weighs 150 lb and jumps onto the boat B which has a weigh of 200 lb. if he has a horizontal component of velocity relative to the boat of 3 ft/s, just before he enters the boat, and the b
A goldfish is swimming at 2.00 cm/s toward the front wall of a rectangular aquarium. What is the apparent speed of the fish measured by an observer looking in from outside the front wall of the tan
Estimate your own moment of inertia about a vertical axis through the center of the top of your head when you are standing up straight with your arms outstretched. Make reasonable approximations an