Question 7: (1 mark for each part) An agronomist wanted to estimate the mean weight of a certain fruit (?) in his farm. He selected a random sample of size ? = 16, and found that the sample mean ?̅ = 55 gm and a sample stranded deviation ? = 3 gm. It is assumed that the population is normal with unknown standard deviation (?). a) Find a point estimate for (?). b) Find a 95% confidence interval for the population mean (?)
Question 7: (1 mark for each part) An agronomist wanted to estimate the mean weight of...
QUESTION 1 In constructing a 95% confidence level estimate of the mean when the population standard deviation () is known what will be your score used in the formula? QUESTION 2 In constructing a 99% confidence level estimate of the mean when the population standard deviation (a) is known what will be your score used in the formula? HINT. Be sure to review page 236 "Finding Z scores from Known Areas - Special Cases and Tabel A-2. QUESTION 3 In...
Bruce Tay, intern at Mark-Analytics, is conducting a study in which a population mean will be estimated using a 92% confidence interval. The estimate needs to be within 15 of the actual population mean. The population standard deviation is estimated to be around 60. The necessary sample size should be at least (round up!): answer .. The weights of aluminum castings produced by a process are normally distributed. A random sample of 6 castings is selected; the sample mean weight...
7. You want to estimate the mean weight loss of people one year after using a popular weight-loss (1 point) program being advertised on TV. How many people on that program must be surveyed if we want to be 95% confident that the sample mean weight loss is within 0.25 ib of the true population mean? Assume that the population standard deviation is known to be 10.6 lb. 6907 0 4865 O 84 O6906 3. Given the standard deviation of...
5.7.2 A hospital administrator wishes to estimate the mean weight of babies born in her hospital. How large a sample of birth records should be taken if she wants a 95% confidence interval that is 1 pound wide? Assume that a reasonable estimate of s is 1 pound. What if she wanted to be 99% certain? Compute the sample size for that as well.
Use the given information to find the minimum sample size required to estimate an unknown population mean u. 4) How many women must be randomly selected to estimate the mean weight of women in one age group. We want 95 confidence that the sample mean is within 2.7 lb of the population mean, and the population standard deviation is kno MEAN. to be 25 lb.
QUESTION: The mean weight of watermelons found in a garden last year was 15.4 kg. In a sample of 35 watermelons at the same time this year in the same colony, the mean watermelon weight was found to be 14.6 kg. Assume the population standard deviation is 2.5 kg. (i) At 5% significance level, can we reject the null hypothesis that the mean watermelon weight does not differ from last year? (ii) What is the test statistics? (iii) What is...
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...
10. Fill in the blank. In developing a 96% confidence interval estimate for some normal population mean μ, the population standard deviation σ was 10, The interval estimate was found to be 12.6 ±3.64. Had σ equaled 5, the interval estimate would be 12. Based on a sample of size n 21 drawn from a normal population, the sample mean and sample standard deviation are, respectively, 15.68 and 1.36. We use T-test to test Ho : μ 15 vs H1...
Question 2 2 marks A population is normally distributed with an unknown mean μ and unknown standard deviation σ. You collect a random sample of 24 measurements with sample mean7-55.9 and standard deviation-7.53. Use this information to answer the questions below (a) [0.5 mark] What is your 95% confidence İnterval for the population mean μ? (b) [1 mark] what is your best estimate for the population standard deviation σ? (c) [0.5 mark] If a fellow enginer tells you that the...
Assume that a sample is used to estimate a population mean H. Find the 99% confidence interval for a sample of size 372 with a mean of 48.4 and a standard deviation of 16.1. Enter your answer as a tri-linear inequality accurate to 3 decimal places. << Question Help: Message instructor Submit Question A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 51 specimens and counts the number of seeds in each. Use...