x̄, σ, and n
The average time it takes for CSUDH students to graduate takes 4.5 years with a standard deviation of 1.02. A random sample of 10 was taken to prove this to be true.
What is 4.5, 1.02, and 10?
σ= 50; n=100
What is 5 ?
The person who said the phrase, "With great power, comes great responsibility."
Who is Uncle Ben?
The z-score equation for the sampling distribution
What is z= ( x̄-μ)/(σ/√n)
The length of a female pregnancy has a right skew distribution with an average pregnancy length of 300 days and a standard deviation of 20 days. Suppose a random sample of 25 was taken to test the average length of pregnancy.
What is 300, 20, and 25?
x̄= 49; σ= 33; n=36
What 5.5?
The phrase Timon and Pumbaa taught Simba in The Lion King.
What is Hakuna Matata?
σ= 54; n=81, x̄=116, μ= 104
What is z=2?
A new mom is worry that their 30 weeks old baby is still not crawling. The mom go out and gains a sample of 12 randomly selected mothers and collects the age (in weeks) at which babies first crawl. The mom finds out that mean time for a baby to crawl is 40 weeks and the standard deviation is 15.
What is 40, 15, and 12?
Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 250 feet and a standard deviation of 50 feet. We randomly sample 49 fly balls.
What is 7.14?
"Mama Always Said, Life Was Like a Box of Chocolates. You Never Know What You're Gonna Get."
What is Forest Gump?
σ= 67; n=49, x̄=126, μ= 130
What is z= -0.42?
Researchers collected data on the NOX levels (in grams/mile) for a random sample of 80 light-duty engines of the same type. From the 40 light-duty engines, they found the mean NOX reading was 2.4565 grams per mile (g/mi) and the standard deviation was 0.2987 g/mi.
What is 2.4565, 0.2987, and 80?
The weights of full-term babies born in the U.S. are normally distributed with a mean of 3500 grams and a standard deviation of 600 grams. Suppose the weight of 100 randomly selected full-term babies were recorded.
What is 60?
Which horror film series features a murderous doll possessed by a serial killer, who goes on a murderous rampage?
What is Child's Play with Chucky as the doll
CSUDH is doing research on their students' IQ scores. The average college student IQ score is 300 with a standard deviation of 24. CSUDH gains a random sample of 121 students to test their IQ scores. What the probability that students score higher than 280 on the test?
What is z= -9.17?
Describe the sampling distribution of the sample mean for x~N(45,20) for a random sample size of 9.
What is 45,20 and 9?
The gypsy moth is a serious threat to oak and aspen trees. A state agriculture department places traps throughout the state to detect the moths. When traps are checked periodically, the mean number of moths trapped is only 0.5, but some traps have several moths. The distribution of moth counts is discrete and strongly skewed, with standard deviation 0.7. Suppose 50 moth traps were sampled.
What is 0.1 or 0.099?
Which is the first Walt Disney animated classic, the first animated full-color movie to be produced?
What is Snow White and the Seven Dwarfs.
According to the Internal Revenue Service, the average length of time for an individual to complete the IRS Form 1040 is 10.53 hours (without any attached schedules). Let us assume that the standard deviation is two hours. Suppose we randomly sample 64 taxpayers. Would it be strange for a person to finish the IRS form in under 12 hours?
What is z= 5.88?