A lifetime of inexpensive wristwatches of a sample of 25 watches has a standard deviation of 4.8 months. assume the variance is normally distributed. use the chi-square distribution table to find any chi-square values to three decimal places.round your final answers to one decimal place find the 90% confidence interval for the variance and standard deviation
4% of DCC students report that they would take a course taught by Prof Woomer again. In a sample of 50, find the probability that. Exactly 5 are…
4% of DCC students report that they would take a course taught by Prof Woomer again. In a sample of 50, find the probability that….. A. Exactly 5 are crazy enough to do so. B. At least 2 are crazy enough to do so.
Create a probability distribution using the data which shows how many cartons of the wine cooler were bought per customer in a month.
Create a probability distribution using the data which shows how many cartons of the wine cooler were bought per customer in a month. Calculate the mean and the standard deviation of your probability distribution. Calculate the probability that exactly 3 six packs will be bought in a month. Calculate the probability that between 4 and 8 six packs will be bought in a month. Calculate the probability that at least 5 six packs will be bought in a month. Calculate the probability that no more than 5 six packs will be bought in a month. RESULTS OF CONCEPT RATING FOR […]
A medical statistician wants to estimate the average weight loss of people who are on a new diet plan.
A medical statistician wants to estimate the average weight loss of people who are on a new diet plan. In a preliminary study, he guesses that the standard deviation of the population of weight loss is about 9 pounds. How large a sample should he take to estimate the mean weight loss to within 3 pounds, with 91% confidence?
Ecommerce.com a large internet retailer is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample…
1. Ecommerce.com a large internet retailer is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in days Lead Times (days) Frequency 0 up to 5 6 5 up to 10 7 10 up to 15 12 15 up to 20 8 20 up to 25 7
