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Information regarding random samples of annual salaries (in thousands of dollars) of doctors in three different specialties is shown below. Pediatrics Radiology Pathology
Sample size 12 10 11Average salary 120 186 240Sample variance 16 18 20
c. Show the complete ANOVA table for this test including the test statistic.d. The null hypothesis is to be tested at 95% confidence. Determine the critical value for this test. What do you conclude?
The Restaurants McBurger says that the waiting time for customers is 3 minutes with a standard deviation of population 1 minute. The quality control department found in a sample of 50 clients that the average waiting time was 2.75 minutes.
Sugar packaged by a certain machine has a mean weight of 5lb and a standard deviation of 0.02 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 - c and 5 + c lb with..
Find the t c for a 90% confidence level with a sample size of 18.
Describe the data for a correlational research study. Explain how correlational research is different from other research evaluating the relationship between two variables.
The original simple form of the Connecticut state lottery (ignoring a few gimmicks) awarded the following prizes for each 100,000 tickets sold. The winners were chosen by drawing tickets at random. If you hold one ticket in this lottery, what is y..
Make a purchase using the internet. Test the claim that the proportion of consumers ages 35-44 who plan to make purchases using the internet has increased at α = 0.01.
Determine which groups differ in average shelf life. Give test statistic, hypothesis, decision rule and hypothesis
Suppose that for a particular flight involving a jumbo-jet with 265 seats, the airline sells 278 tickets. What is the probability that the airline will not have enough seats for all the ticket holders who show for the flight?
A research study reports t(14) = 2.17. How many individuals participated in the study? Is this t statistic sufficient to reject the null hypothesis using a two-tailed test with alpha = 0.05?
Using the following 12 numbers (12, 34, 23, 10, 9, 45, 14, 34, 12, 13, 13, 35), calculate 1. the median 2. the mode 3. the mean
There are 8 men and 4 women in the math club. Four members are selected at random to attend a math conference. Determine the probability of selecting 2 men and 2 women.
To find z-score and required probabilities based on Normal distribution. Assume that childrens weekly allowances are normally distributed in the population.
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