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1. Assuming a normal distribution, What is the z-score associated with the second quartile?
2. Find the following:P(z>2.43)
3. If we wish to have 95% confidence interval, what would be the value of the confidence coefficient?
4. In your own words, describe the relationship between the standard erro (of the mean) and maxium error.
5. In hypothesis testing, as the a level gets smaller, the level of confidence increases. T or F, and why or why not?
6. The calculated p-value for a hypothesis test is 0.084.
What decision about the null hypothesis would occur in the following:
The hypotheis test is completed at the 0.05 level of significance.
given a sample size of 65 with sample mean 726.2 and sample standard deviation 85.3we perform the following hypothesis
Assume that the significance level is α=0.01. Use the given statement and find the P-value and critical value(s). The test statistic of z = -1.26 is obtained when testing the claim that p equals one fourth p=14. (Round to four decimal places as ne..
Develop the 5-Step Hypothesis Test for a particular claim related to your work or life environment. (This should be a test of one-sample mean or one-sample proportion.
He would like to estimate with .05 of the true proportion with a confidence level of 90%. What is the sample size needed?
what is indicated by a large variance for a sample of difference scores?a consistent treatment effect and a high
Use three decimal places in your answers for this problem. The following table was collected.
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
The new study is going to use the confidence level of 90%. The estimator or appreciative must be in 1% of the population proportion. Which is the necessary size of the sample?
Can we conclude from this that most workers there earn between $25 and $35 per hour? Is this right interpretation for margin of error?
in estimating the mean monthly fuel expenditure miu per household vehicle the u.s. energy information administration
a certain population has a mean of 476 and a standard deviation of 36. many samples of size 56 are randomly selected
if we have a uniform random variable that takes values between 7 and 10.5 the graph for the distribution would have a
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