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According to Gallup, about 33% of Americans polled said they frequently experience stress in their daily lives. Suppose you are in a class of 45 students. If 20 students in the class said they frequently experience stress in their daily lives, would you be surprised? Explain and use statistics to support your answer.
Perform the 5 steps of hypothesis testing procedure. Please present the calculations and results and Graphs. Make all possible observations and interpret the results
Explain the difference between independent samples and dependent samples. Classify the following as independent or dependent samples:
About 72% of dog owners buy holiday presents for their dogs. Suppose n = 4 dog owners are randomly selected. Find the expected number of persons, in the sample, who buy their dog holiday presents.
we wish to estimate the mean using a sample size of n = 49. Find the probability that we could be correct within 1kg/m 2 .
Is there reason to believe there is a positive linear correlation between the number of t.v. commercials and the sale of this product?
The amount of a brand of soda in 12-ounces can is approx. normal with a mean of 12.1 ounces and a standard deviation of 0.15 ounces.
The sensitivity of a test is the probability that a person having the disease will test positive (indicating the person has the disease, i.e., it's the probability the test will pick up the fact that a person has the disease).
In part b, sample have greater variability than part a, but sample sizes are unchanged. How does larger variability influence size of standard error for sample mean?
Provide a 99% confidence interval for the population proportion of college students who worked to pay for tuition and living expenses.
Erthromyacine is a drug that has been related with side effects during pregnancy. Assume that 30% of women experience side effects between the 24th and 28th week of pregnancy.
The waiting time to place an order at a branch of a fast-food chain during the lunch hour has had population mean of 3.55 minutes, with a population standard deviation of 1.1 minute.
If population standard deviation is σ = 8 is effect large adequate to be statistically significant? Use two - tailed effect with α = .05
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