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A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05). What is the value of the sample mean?
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
Based on the answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
An aptitude test has a mean of 220 and standard deviation of 10. find the corresponding z score for:
To obtain the probability that the mean wage of 75 randomly selected workers will exceed $43,000
Psychologists once measured 77 variables on a sample of schizophrenic people and a sample of people who were not schizophrenic. They compared the two samples using 77 separate significance tests.
Find out the probability distribution of blood types by gender in the group of 1000 individuals.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
Using Binomial approximation, find the proportion of the days that will be rejected.
Use the permutations rule to determine the total number of different ways the winners can be drawn.
Recent studies have shown that the super-cooling temperature of terrestrial frogs frozen at -6°C has a relative frequency distribution with a mean of - 2°C and a standard deviation of 0.3°C (The first of these studies was reported in Science, May ..
Describe the independent variable and the dependent variables?
Compute an F-statistic for each linear construct and determine its significance. Also, state what questions each of these contrasts address.
State the appropriate set of hypothesis to test whether there is a relationship between the variables X and Y.
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