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A random sample obtained from a population has a mean of µ=100 and a standard deviation of σ = 20. The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error for the two samples.
Difference in the mean number of times men and women order take-out dinners in a month? What is the p-value?
A five-star hotel accepts 100 room reservations daily. For each reservation accepted, there is a 7% chance that the guest will not arrive.
If a student is randomly selected what is the possibility that the student is male and from out of state.
It is better to use the median rather than the mean for a distribution when:
Use value you found in part a to find out degree of confidence for interval 65.65
The following frequency table determine the ages of 100 shoppers at the local grocery store. Compute the sample mean for this data (mean for the grouped data).
The estimated salary range is $4,500, the margin of error should be $100 and the desired level of confidence is 95%.
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
What will be critical value of chi-square if test is to be performed at 0.025 level? At the 0.05 level?
One approach would be to contact every psychology graduate student you know and ask them to fill out a questionnaire about it.
Describe what do you mean by conditional probability. Give clinical example to support the explanation.
The mean of a normal probability distribution is 60; the standard deviation is 5.
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