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A researcher wants to find the average IQ of Missourians. She randomly samples 100 people who live in the state, and obtains the following results:
Mean = 106.5 SD = 12.0
Calculate the 95% confidence interval for the mean IQ of Missourians.
Explain what the 95% confidence interval obtained in question 7 really means.
The random variable x has a normal distribution with mean=30 and standard deviation = 30. Find the probability that x assumes a value more than two standard deviations from its mean more than three standard deviations from the mean.
ENVX1002 Introductory Statistical Methods - MODELLING ASSESSMENT TASK. Plot the data and the fitted logistic equation on the same graph. Interpret the estimates of the parameters of the logistic equation biologically where possible
Find the probability that the mean cost of a pair of shoes will be less than $80: P(.Assume that the variable is normally distributed.
Your bank sends you a summary statement, giving the average amount of all checks you wrote during the month.- Using this and the information provided by the bank, can you figure out the amounts of the two missing checks?
Direction: For this assignment you will write an essay that will explore factors that affected your development during your early childhood years. This essay should be double-spaced and approximately two pages in length. When writing your essay, c..
Obtain the margin of errors for both part a and part b. Explain why the margin of error obtained in part b is larger than that in part a.
Draw your friend a tree diagram of all possible outcomes, and use your tree diagram to determine the correct probability of having 2 boys and 2 girls.
Rhubarb Suppose you purchase a bundle of 10 bareroot rhubarb plants. The sales clerk tells you that 5% of these plants will die before producing any rhubarb.
Find the critical value Zsigma/2 that corresponds to a 99% confidence level.?
Assignment - Hypothesis Testing - Write the null and alternative hypothesis for a two-tailed test for each of the following variables: height and age
The confidence interval was .367 .03, or .337 to .397. To determine the amount of tax Sears believed it was owed, the percentage of out-of-city sales.
if the possible values for x are 1, 2, 3, 4, 5 with probabilities .2, .1, .1, .5, .1, respectively, what are the population mean, variance and standard deviation?
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