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Test scores on a university admissions test are normally distributed, with a mean of 500 and a standard deviation of 100.
a) What is the probability that a randomly selected applicant scores between 425 and 575?
b) What is the probability that a randomly selected applicant scores 625 or more?
You sample a group of computers and use the sample statistics to calculate a 95% confidence interval of (-10.95, -1.5). This interval estimates the difference of (average boot time (HDD) - average boot time (SSD)). What can we conclude from this i..
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
Describe why the normal distribution can be used as an approximation to binomial distribution. What conditions should be met to use the normal distribution to approximate the binomial distribution? Why is a correction for continuity essential.
Multiple choices based on regression analysis - the percentage of variation in the dependent variable explained by the variation in the independent variable
Given that standard deviation process=4.7 and standard deviation gage=3.4, what is the total standard deviation in data from this process?
No, there is not sufficient information to reject the hypothesis that the proportion of cats and the proportion of dogs that sleep more than 10 hours per day are the same because the test value -0.65 is inside the acceptance region (-1.96,1.96).
What is the probability the average of the sample is more than $38000 and What is the standard deviation of the sample mean
A random sample of 48 managers of large hotels has mean X‾= 5.91. The null hypothesis for the researcher's test is?
Do not forget to test for any applicable difference in means (Tukey implies).
Construct the 90 percent confidence interval for the proportion of checking account customers who have a Visa card with the bank. (Round your answers to 3 decimal places.)
Determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
Estimate the probability the store will gross over $850 a) At least 3 out of 5 business days.
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