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You, as an owner of an insurance company have been worried about the increasing age of your policy holder base. You want to determine if the new advertising campaign has had the desired effect of attracting more younger customers. You have taken a sample of ten new policies and have found the following ages:
32 22 24 27 27 33 28 23 24 21
a) Determine the mean, median and mode of those data. Make sure you show your hand computeed work
b) Is there any indication from this group of data that the new policy holder may lean toward younger ages?
Significant increase in the mortality of lung cancer in both genders, but no significant effect was observed at lower levels." Is this an observational study or an experiment? Fully explain your reasoning.
Find a point estimate of the population mean. Find the 95% confidence interval of the population mean. Assume the variable is normally distributed.
Build a 95% confidence interval for the mean of the population from the given sample data.
Some studies suggest a beta-carotene intake over 3000 mcg may protect against ?macular degeneration. What percentage of people has a dietary beta-carotene intake of at least ?3000 mcg?
What is the slope of the least-squares regression line of final-exam scores on pre-exam total scores in this course?
For a hypothesis test about a population proportion or mean, if the level of significance is less than the p-value, the null hypothesis is rejected.
According to study done by Nick Wilson of Otago University, the probability a randomly selected individual will not cover his or her mouth when sneezing was 0.267. Suppose you sit on a mall bench and observe 200 people pass by as they sneeze.
Calculate chi-square for the cross-tab. Show your work. Is there a statistically significant relationship between these variables?
A random sample of 100 voters found that 44% were goint to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidate.
Research the topic of Job Satisfaction using the Business Source Premier Database (EBSCO) and/or the ABI Inform Global database in the Library using the instructions linked here.
If 15 golfers have checked in using this process, what is the expected number and standard deviation of no-shows among these golfers? (Show computations)
1- ounce chocolate chip cookies resulted in following calorie amounts. At α=0.01 level, is there sufficient evidence that average calorie content is greater than 110 calories.
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