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Scatter plot and correlation:
Build a scatter plot, Find the value of the linear correlation coefficient r, and find the critical value of r using α=0.05. Determine whether there is sufficient evidence to support a claim of a linear correlation between the two variables.
CPI and Pizza the paired values of the consumer price index (CPI) and the cost of a slice of pizza are listed below: Is there a linear correlation between CPI and the cost of a slice of pizza?
CPI
30.2
48.3
112.3
162.2
191.9
197.8
Cost of Pizza
0.15
0.35
1.00
1.25
1.75
2.00
Sketch the areas under the standard normal curve over the indicated intervals, and find the specified areas.
Test this conjecture with formal hypothesis test, by using a 5% significance level. Find out the p-value for hypothesis test.
Using the .05 level of significance: a) Is there a difference among types of gasoline? b) Is there a difference in the cars?
Test the claim that for the adult population of one town, the mean annual salary is given by μ = $30,000.
Suppose we wish to predict the crawling age of a particular baby when the average outdoor temperature is 25°F six months after birth.
Suppose that the population of heights of male college students is approximately normally distributed with mean m of 68 inches and standard deviation s of 3.75 inches. A random sample of 16 heights is obtained.
what percent of the total number of seeds germinated?
Calculate the value of Pearson correlation. Illustrate what information is provided by the numerical value of the Pearson correlation.
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
What should the cut-off score be for the interviews? (Round to nearest whole number).
Write all the possible samples of size 2 and calculate the average or median of each one.
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