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A group of items are categorized according to a certain attribute - X,Y,Z - and according to the state in which they are
produced:
X
Y
Z
New York
20
5
California
10
a. Create a side by side bar chart to compare the numbers of items of each type made in California and New York.
b. Create a stacked bar chart to compare the numbers of items of each type made in two states.
In the sample of 80 students, 9 were found to be overweight. At a= 0.01, is there adequate evidence to reject claim using critical values?
in a sample of children and adolescents who are receiving treatment for aggression 31 out of 68 females reported sexual
A random sample of 32 bottles is selected, and the mean amount of water per 1 gallon can is found to be 0.995 gallon. Calculate the test statistic.
a recreational equipment supplier finds that among orders that include tents 40 also include sleeping mats. only 5 of
If the researcher deems the data to be statistically significant, which of the following is true with respect to a conclusion reached?
A random sample of 64 services is selected. What is the probability that the sample of 64 will have a mean service time greater than 114 minutes.
in a large american university in 1969 the male and female professors were sample independently yielding the following
consider use of a students t distribution to test the difference of means for independent populations using random
1. a random sample of 16 size d batteries for cars yield a mean of 2.8 hours with standard deviation 1.3 hours.a find
you notice in your introductory psychology class that more women tend to sit up front and more men sit in the back.
Randomly select a sample of five rental agencies. Start with row two and column two. The number is 90935. Use the first two numbers starting with 90.
Suppose that 55 percent of the people in a population of 500,000 support your candidate. If you conduct a poll of 1,000 people, what is the interval that has a 95 percent chance of containing the results of your poll?
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