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A factory that manufactures screws is performing a quality control experiment. Each object should have a length of no more than 10 centimeters. The factory believes that the length of the screws is less than this value and measures the length of 65 screws. The sample mean screw length was 10.08 centimeters. The population standard deviation is known to be σ=0.26 centimeters.
What is the null hypothesis?
What is the alternative hypothesis?
a standardized test has a mean of 104 and a standard deviation of 16. we want to be 98 certain that we are withing 4
the probability density function fx x8 exists for the interval 3 lt x lt 5. what is probx gt
1.a psychology instructor asked the 100 females in her class to rate their intelligence on a scale of 1 to 10. the
The amount of time a bank teller spends with each customer has a population mean, µ, of 3.10 minutes and standard deviation, s, of 0.40 minute.
The mean weight is 402.7 grams and the standard deviation 8.8 grams. What is the probability that the mean weight for a sample of 40 trout exceeds 405.5 grams?
a random sample of size 64 is to be used to test the null hypothesis that for a certain age group the mean score on an
Farmers have always had plenty of data but few tools to help them analyze the data. For example, they receive data from their feeding machines as well as reports on health status, reproductive status, and milk production from their veterinarians. ..
1) Suppose the mean test scores for a college enter exam is normally distributed with mean = 78 and standard deviation = 12. a). If an individual student is selected at random, what is the probability that this student's score is over 80?
Determine if the aerobics program was effective in lowering heart rate. What is the margin of error?
How many capsules should a box of amoxicillin antibiotic contain? Medical research claims that 8 days of treatment with 3 tablets each day
After reviewing the Verizon Report, what points or statistics strike you? Why? Name some, why do you consider them candidates for Gen to Rev classification?
After collecting data for 30 days, you plan to construct the control charts.
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