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A random sample of n=9 men between 30-39 years old is asked to do as many sit ups as they can in one minute. The mean number is x=26.2 and the standard deviation is s=6.
a. Find the value of the standard error of the sample mean. Write a sentence that interprets this value.b. Find a 95% confidence interval for the population meanc. Write a sentence that interprets the confidence interval in the context of this situation
In general how is the magnitude of the standard error of estimate related to the value of correlation?
The analysis needs to be re-run adding the error into the regression sum of squares.
Is it true that one of the important properties of time series models is that some sort of pattern in the data over time should be detected first and then used within the model?
Critically discuss the reasons for studying statistics? Choose five random numbers between 70-100. Calculate the mean, and midrange of these numbers.
Cold Stone Creamery has recorded demand for the particular flavor of ice cream during first seven days of July. Results are as follows: Forecast the sales for 8th day of July using 5-day moving average.
Determine the distribution of X? Determine its parameters?
Use Friedman test to find out whether there is evidence for significant difference between two population variance. Use .05 level of significance.
Standard deviation is $0.10. At α = 0.01, is there significant difference in price? Determine the 99% confidence interval of the difference in the means.
Using the table below, compare and contrast the main differences between two quantitative research designs and two qualitative research designs.
In a recent study of incomes in Allegheny county in Pennsylvania it was found that distribution of family incomes is skew to the right. what can we say about the relationship between mean and median?
The researcher in exercise decides to conduct the same study using a within - participates design to control for differences in cognitive ability.
A deck of playing cards contains 52 cards, four of which are aces. What is the probability that deal of a five-card hand provides?
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