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In a certain high school, 20% of the graduating seniors chose to attend the Ohio State University for college. If there are 265 seniors in the graduating class, the number who will go to the Ohio State University is a binomial random variable. What is the mean number of seniors going to the Ohio State University?
If the researcher computes the t-statistic to be 4.2 and t-value found in t table for df=60 and level of significance of 0.5, is 2.0 researcher would accept or reject null hypothesis.
State the null hypothesis and alternative hypothesis. Indicate the type of test to be performed (left-tailed, right-tailed, or two tailed). Provide a statement in terms of the hypothesis testing process in this problem that would signify a Type I ..
A random sample of 51 observations was selected from a normally distributed population. The sample mean was = 88.6, and the sample variance was s2 = 38.2.
The NAEP test was also given to a sample of 1077 women of ages 21 to 25 years. Their mean quantitative score was 275. Take it as known that the standard deviation of all individual scores is = 60.
The recorder has an instantaneous failure rate of 0.0002 failures/hour (constant rate). What is the probability that the system is functioning after 1000 hours? (Show work).
When using the distribution of sample means to estimate the population mean, what is the benefit of using larger sample sizes?
Determine the control limits for the mean and the range. Plot the control limits for the mean outside diameter and the range.
In the week before and the week after a holiday, there were 10,000 total deaths, and 4972 of them occurred in the week before the holiday.
Test against the null hypothesis of a one sided alternative that the difference is more than 10 minutes. Use a .1 level of significance (alpha).
What are the null and alternative hypothesis for this? What is a type II error in context of this test? Suppose that the researcher deceides not to reject the null hypothesis what sort of error might he be making?
Is there significant evidence that this production run doesn't meet specifications? Use a 1% level of significance.
Is global F ratio significant? Identify this F ratio, and describe whether it is important.Is coefficient for X1 (productivity) significant? How do you know? Mention its t value and accompanying P-value.
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