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Finding 68% confidence interval using proportion testing.
In a large class, the professor has each person toss a coin several times and calculate the proportion of his or her tosses that were heads. The students then report their results, and the professor plots a histogram of these several proportions. Use the 68-95-99.7 Rule to provide the appropriate response.
If the students toss the coin 200 times each, about 68% should have proportions between what two numbers?
a. 0.035 and 0.07b. 0.465 and 0.535c. 0.16 and 0.84d. 0.4975 and 0.5025
Here are fifty observations on the weight of tea bags. Create mean, mode and median.
Between what two values does the P -value of this test fall?
The mean maximum oxygen uptake for elite athletes has been found to be 80 with a standard deviation of 8.1. Assume that the distribution is approximately normal.
Investigate the cost of a home mortgage and to determine the monthly payment.
Use this information to construct a probability table, and then calculate each of the following probabilities:
The p-value of the test is closest to:
Prepare an ANOVA table and test the null hypothesis of no linear relationship between the two variables.
Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is
Key Refining decided to send a special financing plan to charge account customers having the highest 10 percent of the money charges. What is the dividing point between customers who receive the special plan and those who do not.
The upper limit of a 95% confidence interval for the population mean would equal:
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The researchers planned to use simple linear regression to see if the age at which a baby was first able to crawl could be predicted from the average outdoor temperature six months after each baby's birthdate.
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