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1) Below is the data set for the amount of trash by ten households (in pounds per day). Assume the population is normally distributed. Pounds of trash: 3.9, 4.6, 15.6, 10.5, 16.0, 6.7, 12.0, 9.2, 13.8, 16.8 Construct a 95% confidence interval for the mean based on the sample. Calculate the sample mean. Hint: use the t-table. 2) A random sample of 175 registered voters revealed that 54% of them voted in the last election. Construct a 95% confidence interval to estimate the true proportion of voter turnout. 3)A company claims the average time a customer waits for help is 4.78 min. The sample size is 35 customers. Assume the population standard deviation for wait time is 1.8 min. Test the company claim at the α = 0.05 significance level by comparing the calculated z-score to the critical z-score
Her results (in hours until turning a particular shade of brown) are in the table below. At ∞= .01, did she see a difference between the two treatments?
What are the primary differences between investments in corporate stock versus corporate bonds? Since bonds pay interest, does that imply the individuals risk exposure is less for investing in bonds rather than stock?
Use the following information to tfind the P-value
In a graduating class of 753 high school seniors, what is the probability that 15 or more will live beyond their 90th birthday?
Determine the p-value for this test. Is there sufficient evidence to justify the rejection of H0 at the "alpha" level of 0.01? Please explain your answer.
An investigator wants to estimate caffeine consumption in high school students. How many students would be required to ensure that 95% confidence interval estimate for the mean caffeine intake (measured in mg) is within 15 units of the true mean? ..
A pair of dice is rolled. The sum of the faces on top is observed. What are the expectation, variance, and standard deviation of the observed sum? The Expectation and Variance Template attached to the main posting is optional and recommended.
The random digit dialing machine is expected to reach a live person 15% of the time. In eight attempts, what is the probability of achieving exactly two successful calls?
How would you describe the function of a generalized linear regression model?
Which of the following is the correct set of probabilities for X and if a student is selected at random, the probability he or she is either a Junior or a Senior
Suppose that you select a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
Obtain a test statistic and p-value. Interpret the results at = .01.
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