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A team of psychologists studying narcolepsy (a sleep disorder characterized by sudden nodding off during the day) decided to follow 20 narcoleptic volunteers throughout the course of one day and record how many times they each fell asleep. The data they collected have been arranged in the following simple frequency distribution:
N = 20
Find (a) the mode, (b) the median, and (c) the mean.
1. the company believes that it averages about the same weight per bag in each of two production lines. to test this
Suppose the counselor found the sum of squared deviations from the mean of the sample to be 135. Given that he tested 10 people, what would the estimated population variance be?
you are in possession of an unusual 5-sided die. specifically the die which is not evenly weighted takes on five
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
part-1reinforce understanding of power beta and alpha.problem a packing process is designed to fill steel drums with
Range of 0 to 5 Volts. An environmental effect, such as a change in ambient temperature, lowers the sensitivity by 2%. What span error does this generate?
in a large population 95 of the households have cable tv. a simple random sample of 64 households is to be contacted
the 70-year long-term record for weather shows that for new york state the annual precipitation has a mean of 39.81
She was concerned that the test she wished to perform might have unacceptable large possibilities of Type II error, ß. Which of the following would solve this problem?
The probability of an randomly selected person quits a team is 0.125. Assume the team has n members. Determine the smallest n that the team needs to have if the probability of the team has at least 20 members left is 0.9.
shards of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels found at the wind
Hypothesis testing of single mean - can we conclude that the mean weight is greater than 16 ounces? Determine the p -value.
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