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Average of 4.0 hours of television per person per day. The standard deviation of the number of hours of television watched per day is 2.1 and random sample of 250 americans is selected, the mean of this sample belongs to a sampling distribution. What is the shape of this sampling distribution?
The scatter diagram for data set below is shown. a) given that x= 3.667, sx = 2.5819889, sy= 1.5937377 and r= -0.8894261, find out least -regression line.
Use the normal-theory method to test for significant differences in 12-month mortality between the two groups.
Normally distributed with a mean of 52 and a standard deviation of 3. What is the probability that the MPG for a selected mid-size car would be greater than or equal to 50.
Enter data into SPSS (use two columns: one for coding {0, 1, 2, 3, 4, 5} and one for DV)
Given that 30% of US adults are smokers, find the average of the random variable X= # of smokers in a random sample of 50 residents of the USA, also find the variance and standard deviation of X.
Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone.
A study is conducted to determine if the traffic light patterns at a busy intersection need to be adjusted to help the flow of traffic. Data on the volume of traffic and the traffic patterns during different times of day are recorded.
B is independent of C or not? Focus on probabilities assigned in the subsets, 0.05 is repeated in C, but 0.10 is repeated in B, so P(A∩C)=?
Construct the 95% confidence interval estimate of the mean number of migraine attacks for those treated with acupuncture.
What is the population? What values does the population distribution describe? What is this distribution? What values does the sampling distribution of x describe? What is the sampling distribution?
The sample mean price is computed from the prices at these gas stations. What is the probability that the sample mean price falls within a nickel of the State's overall mean price? i.e between 3.09 and 3.19.
Describe your answer to a person who has never had a course in statistics.
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