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1. A large study was done to compare two treatments for recurring ear infections in young children. A total of 150 subjects were recruited for the study, with 50 subjects assigned at random to treatment 1 and the remainder to treatment 2. As part of the study, various types of demographic information were gathered.
The following table classifies the mother's education level into one of four categories for each of the treatment groups.
The null hypothesis is that the distribution of mother's educational level is the same for both treatment groups. The value of the chi-square statistic is 7.422. The P-value isA. less than 0.05.B. between 0.05 and 0.10.C. greater than 0.10.
2. A large study was done to compare two treatments for recurring ear infections in young children. A total of 150 subjects were recruited for the study, with 50 subjects assigned at random to treatment 1 and the remainder to treatment 2. As part of the study, various types of demographic information were gathered. The following table classifies the mother's education level into one of four categories for each of the treatment groups.
Under the null hypothesis that the distribution of mother's educational level is the same for both treatment groups, the expected number of mothers who are college grads for treatment 2 isA. 10.00.B. 13.33.C. 25.00.
What is the probability that any given box is under the 450 grams than the box is supposed to weigh and what is the probability that the total weight of a given "2-pack" is less than 900 grams?
A comparison group consisted of 5,055 children who had received no such treatment (brothers and sisters of the children who had received radiation treatment).
A City Survey states that 70 percent of all business owners favor increasing the parking fees. The city has commissioned a random sample of n = 100 business owners.
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 370 grams and a standard deviation of 15 grams. Find the weight that corresponds to each event:
Lashing together logs of diameter .30m and length 1.8m. How many logs will be needed to keep them afloat in fresh water. take the density of the logs to be 800kg/m^3.
The fixed monthly cost of operating the production facility is $3000. How many units of part # 2206 have to be sold in a month to break-even?
Compute mean yearly value using average gas prices by month found in "Final Project Data Set." Using years as your x-axis and annual mean as your y-axis, design scatterplot and linear regression line.
Your younger brother comes home one day after taking a science test. He says that someone at school told him that "60% of the students in the class scored above the median test grade." What is wrong with this statement? What if he said "60% of the..
A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error?
What is the probability that Susan passes on the first try? What is the probability that Susan first passes on the second try?
Historically, 70% of your customers at Rodale Emporium pay for their purchases using credit cars. In a sample of 20 customers, find the probability that
Some authorities claim that globalization has led to greater income inequality in the U.S. and globally while others claim that inequality is due to improvements in technology and productivity. Using the Library and Internet sources, do the follow..
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