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state the hypothesis and identify the claima. There is less than 7 beds per house in Compton; Decision in to reject the null hypothesisb. 30 % of Americans go to church on Sundays. Decision is not to reject the null hypothesis
From these statistics she calculates a 90% confidence interval of [20.9 grams, 25.1 grams]. What can the researcher do to decrease the width of the confidence interval?
There is a probability that the river will flood next year. Riverside's profits for the coming year depend on whether Laura buys the flood insurance and whether the river floods.
Toby's trucking company determined that the distance traveled per truck per year is normally distrinuted, with a mean of 50.0 thousand miles and a standard deviation of 12.0 thousand miles.
In a classical experiment, Gregor Mendel observed the shape and color of peas that resulted certain crossbreedings. A sample of 556 peas was studied with the result that 315 produced round yellow,
At the .05 significance level, is there a difference in gas mileage for the different types of gas? Write out your null and alternative hypotheses for the problem and state what the finding means practically.
Class finds 54% of 450 randomly selected voters are in support. Both groups will create 95% confidence intervals. Which group concludes that the outcome is too close to call? Why?
Environmental Protection Agency (EPA) fuel economy estimates for automobile models tested recently predicted a mean of 24.80 mpg and a standard deviation of 6.2mpg for highway driving. Assume that a normal model can be applied.
Employees of a local university have been classified according to gender and job type. The following table provides data about the employees.
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
Estimating the individual score using normal distribution - blood pressure higher than what amount?
If the sum of squares total is 800 and the sum of squares error is 170. What is the r-squared value?
What is the probability that a dog owner will spend more than $130 on medical care in a given year? What is the prbability that a cat owner will spend $160 or more on medical care in a given year?
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