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A person's body temperature is found to be 101.00 °F. Is the result unusual? Why or why not? What should you conclude? What body temperature is the 95th percentile?
Bob loves making candy, especially varieties of caramel, including plain, chocolate dipped caramels and chocolate dipped caramels with pecans. Bob has received lots of compliments from his friends
After plotting the data point s on a scatter diagram, we have observed an inverse relationship between the independent variable (X) and the dependent variable (Y). Therefore, we can expect both the
You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You decide on the 95% confidence level and that the estimated proportion must be within 2% of the populati
Conduct the appropriate hypothesis test for Company B using a 0.01 level of significance. What is the critical point for the test.
Based on this survey, a "95% confidence interval" for the proportion in the population who believe in faith healing is about 42% to 48%. If this poll had been based instead on 5000 adults, do you th
team players have an average weight of 184 pounds with a standard deviation of 9.5 pounds. what percent of players weigh over 200 pounds? What percent of players weigh between 175 and 205 pounds? Ho
How many of the policyholders would you expect to have filed a claim within the last year? what is the probability that more than 10 submitted a claim?
How long would it take to estimate the % of entries having errors using a random sample big enough to get a margin of error less than 2%?
In a local university, 40% of students live in dormitories. A random sample of 80 students is selected for a particluar study. What is the probability that the sample portion (those living in dorms)
What would happen to the confidence interval if you increased the sample size to 200? Why? What are the new margin of error and confidence interval?
one bolt produced at this factory is randomly choosen and is found to be defective. what is the probability that it was produced by machine B ?
According to the labor dept, in 2004, 14% of architects and engineers were women. Suppose a random sample of 50 architects and engineers is selected. How likely is it that the random sample contains
A mean of 16.5lb and a standard deviation of 2.5lb. what is the largest annual per capita consumption of ice cream that can be in the bottom 15%?
Eleanor scores 629 on the mathematics part of the SAT. The distribution of SAT math scores in recent years has been Normal with mean 539 and standard deviation 109. Gerald takes the ACT mathematics
An unemployment counselor found that in a sample of 100 unemployed workers, 65% were not interested in returning to work. Find the 95% confidence interval of the true proportion of workers who do no
a softdrink machine is regulated so that the amount of drink dispensed is approximately normally distributed with a standard deviation equal to 0.15 deciliter. Find a 95% confidence interval for the
Determine how large a sample would be necessary to estimate the population proportion with a margin of error of .05 at 95% confidence.
A new chewing gum has been developed that is helpful to those who want to stop smoking. If 60 percent of those people chewing the gum are successful in stopping smoking, what is the probability that
What potential legal and ethical issues could arise if the information gained in this survey was used to create an ideal profile of characteristics that the company looked for when hiring employees?
A new business with 125 employees is moving into the area. what is the probability that the new employees will consume more than 240 cups of coffee per day.
Do you think a sample of 25 is large enough to give them the margin of error they want? If not, how large a sample do you suggest they take? Justify your answer with relevant calculations.
How many bolts should be sampled in order to make us 95% confident that the sample mean bolt length is within .02 inches of the true mean bolt length?
Suppose the age of buyers were collected and the data follows the bell curve (a normal distribution). The buyers had an average age of 47 years and a standard deviation of 5. The ranges and pe
The owner of a fast-food restaurant has found the daily demand for ground beef at her restaurant to be normally distributed, with a mean of 240 lbs. and a standard deviation of 23 lb.