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What statistical test did the researchers use to determine if there was a statistically significant difference in levels of self-esteem between the boys and the girls?
What was the purpose of calculating a Cohen's d? When is a Cohen's d calculated? Interpret d=.90. What does it mean in this example?
What if the researcher compared the adolescent boys before treatment and again after treating them for depression? What type of t-test would be most appropriate in this case, and why?
In a population of 5000 students, a simple random sample of 50 students is selected in order to estimate the weighted average mark for the population.
an automobile manufacturer would like to know what proportion of its customers are dissatisfied with the service
in the game of keno if you make a 1 bet on a pair of numbers you have a 94 chance of losing and thus losing your one
How to collect and interpret data.
the makers of a soft drink want to identify the average age of its consumers. a sample of 55 consumers was taken. the
Compare the mean and standard deviation of the actual distribution of your 50 sample proportions for 20 tosses to what the theoretical sampling distribution model says the mean and standard deviation should be.
test the significance of the correlation coefficient r at a 0.05 for the data below.x values 55 61 70 78 88y values 89
State a question that can be answered in a "binomial" manner, such as Do you normally read the front page of a newspaper at least 4 times a week?
a network provider investigates the load of its network. the number of concurrent users is recorded at fifty locations
Determine which crew should be sent to each city to minimize the total distance traveled. How many miles will be traveled if these assignments are made?
Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level. Complete an ANOVA table. State your decision regarding the null hypothesis.
In a Gallup poll of 1,038 adults, 540 said that second-hand smoke is very harmful. What is the percentage of adults who said second-hand smoke is very harmful.
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