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1. In the Journal of the American Dietetic Association, it was reported that 54% of kids said that they had a snack after school. A random sample of 60 kids was selected, and 34 said that they had a snack after school. Use α = 0.01 to test the claim.
2. According to the American Pet Products Manufacturers Association, cat owners spend an average of $179 annually in routine veterinary visits. A random sample of local cat owners revealed that 10 randomly selected owners spent an average of $205 with s = $26. Is there a significant statistical difference at α = 0.01? Assume the population is normally distributed.
3. The mean salary of federal government employees on the General Schedule is $59,593. The average salary of 30 state employees who do similar work is 558,800 with σ = $1500. The sample data is normally distributed. At the 0.01 level of significance, can it be concluded that state employees earn on average less than federal employees?
In the data collected for construction of c chart, the average number of defects per unit of output is c = 7.5. Discuss the 3-sigma upper and lower control limits for the control chart?
each computer chip made in a certain plant will independently be defective with probability .25. if a sample of 1000
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suppose you are given data from a survey showing the iq of each person interviewed and the iq of his or her mother.
a competency test has scores with a mean of 69 and a standard deviation of 4. a histogram of the data shows that the
a set of 4 numbers is selected at random from s 12345678 without replacement. what is the probability thata exactly 2
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Neither married nor a college graduate? (answer should be a probability, that is, a number between 0 and 1). Married but not a college graduate? (answer should be a probability, that is, a number between 0 and 1).
a normal distruibution of 640 observations has a mean of 1800 cm and a standard deviation of 90 cm.a draw a
an automobile manufacturer obtains the microprocessors used to regulate fuel consumption in its automobiles from three
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