A pizza shop owner wishes to find the 95% confidence interval of the true mean cost...
In order to find the 95% confidence interval of the true mean, how large of a sample size would be necessary to be accurate within 0.1 g. given a standard deviation of 0.3 g? (8 points) 9 10, A T V network claims that 20% of the viewing public watches a certain one of its shows. A survey of 100 TV viewers found that 13 watch the show. If a 0.05, is there enough evidence to reject the network's claim?...
A researcher wishes to know with 95% confidence the proportion of people who own a desktop computer. A previous study showed that 40% of those interviewed owned a desktop. The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary.
The owner of a pizza shop in Lincoln wants to know how many pizzas she will need to make this month. She has asked you to figure out how many she should be prepared to make for the upcoming month. She has been collecting data for the past year on how many pizzas she makes every month. The data is given below. 80, 67, 76, 56, 65, 90, 78, 77, 89, 83, 86, 74 83, 65, 77, 66, 75, 89,...
8.2.29 Question Help A manager wishes to estimate a population mean using a 95% confidence interval estimate that has a margin of error of +49.0. If the population standard deviation is thought to be 680, what is the required sample size? The sample size must be at least (Round up to the nearest whole number.)
8.1.5 Question Help Determine the 95% confidence interval estimate for the population mean of a normal distribution given n = 100, o = 133, and x = 1,500 The 95% confidence interval for the population mean is from to (Round to two decimal places as needed. Use ascending order.) 8.1.14-T Question Help As a follow-up to a report on gas consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage for their vehicles. A simple...
Step by step please A researcher wishes to estimate with 95% confidence the proportion of people that own home computers. No previous study was available for a proportion estimate. The researcher wants to be accurate within 2% of the true proportion. How large of a sample is necessary? *hint: when no proportion estimate is available, we use p-hat = .50
An analyst from an energy research institute in California wishes to estimate the 85% confidence interval for the average price of unleaded gasoline in the state. In particular, she does not want the sample mean to deviate from the population mean by more than $0.05. What is the minimum number of gas stations that she should include in her sample if she uses the standard deviation estimate of $0.31, as reported in the popular press?
Explain what "95% confidence" means in a 95% confidence interval. What does "95% confidence" mean in a 95% confidence interval? A. If 100 different confidence intervals are constructed, each based on a different sample of size n from the same population, then we expect 95 of the intervals to include the parameter and 5 to not include the parameter. B. The probability that the value of the parameter lies between the lower and upper bounds of the interval is 95%....
A pizza shop owner determines the number of pizzas that are delivered each day PLEASE FIND MEAN, VARIANCE, AND STANDARD DEVIATION Number of deliveries X 36 37 38 39 40 Probability P(X) 0.1 0.1 0. 0.3 0.2
When planning to construct a 95% confidence interval for a population mean such that it is within one eighth (population) standard deviation from a sample mean, what is the minimum sample size required?