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1. A geography teacher is interested in the link between mathematical ability and the ability to visualize three dimensional situations.He gives a group of 15 students a test and records each students score, m, on the mathematics questions and each students score, v, on the visio-spatial questions
He calculates the following summary statistics:
Smm = 3747.73, Svv = 2791.33, Smv = 2564.33
(a) Calculate the product moment correlation coefficient for these data
(b) Stating your hypotheses clearly and using a 5% level of significance test the theory that students who are good at mathematics tend to have better visio-spatial awareness.
Determine the class with the greatest number of data values.
To test whether the population mean is less than a specified value.
A simple random sample of 50 items from a population with σ 6 resulted in a sample mean of 32.
Explain how one extreme score influences mean and standard deviation.
A GSS asked. "What do you think is the ideal number of children for a family to have? the 497 female who responded had a median of 2, mean of 3.02 and standard deviation of 1.81 (a) Report the point estimate of the population mean.
Chocolate bars produced by a certain machine are labeled with 16.0 oz. The distribution of the actual weights of these chocolate bars is Normal with a mean of 16.1 oz and a standard deviation of 0.1 oz. A chocolate bar is considered underweight if..
Critically illustrate out the purpose of developing frequency distribution? Describe the relationship between the relative frequency and the cumulative frequency.
In a study, the carapace lengths (in mm) of Thenus lobster caught near Singapore measured: 78,66,65,63,60,60,58,56,52 and 50 ( the population data is approximately normal).
Customer's arrive at See's Candy Store at a rate of 2 every 5 minutes. What is the probability that no customers will arrive in a 5 minute period?
At the time she was hired as a server at the Grumney Family restaurant, Beth Brigden was told, "You can average more than $20 a day in tips.
The width of a confidence interval will be:
A consumer survey indicates that the average household spends m=$155 on groceries each week. The distribution of spending amounts is normal with a standard deviation of o=$25. Based on this distribution
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