Efficient manufacturing: Efficiency experts study the processes used to manufacture items in order to make them as efficient as possible. One of the steps used to manufacture a metal clamp involves the drilling of three holes. In a sample of 60 clamps, the mean time to complete this step was 45.5 seconds. Assume that the population standard deviation is o = 7 seconds. Round the critical value to no less than three decimal places. Part: 0 / 2 Part 1 of 2 (a) Construct an 80% confidence interval for the mean time needed to complete this step. Round the answer to at least one decimal place. An 80% confidence interval for the mean is <μ< Part: 1 / 2 Part 2 of 2 X (b) Find the sample size needed so that a 99.5% confidence interval will have margin of error of 1.5. A sample size of is needed in order to obtain a 99.5% confidence interval with a margin error of 1.5. Round the sample size up to the nearest integer. X

Question 36 An honor society on campus only accepts the top 13% of students (according to GPA). If the GPAS of all students on campus are known to be a normally distributed with a mean of 2.99 and a standard deviation of 0.45, determine the minimum GPA a student must achieve in order to be admitted to the honor society. Round the solution to two decimal places, if necessary. A minimum GPA of is required for admission to the honor society.

Question 1    A pediatric nurse is researching weight gain in premature babies.   Previous research has indicated that premature babies gain a mean of 150 grams per month (assume σ = 22.3) .  The nurse is researching a new program that has the goal of increasing the mean weight gain in a month.   The nurse takes a random sample of 40 premature babies to participate in the program over the next month with a resulting sample mean weight gain of 160 grams per month. What is the value of the test statistic? A.  -0.45   B.  2.84   C. 0.45   D.  -2.84       Question 2     A pediatric nurse is researching weight gain in premature babies.   Previous research has indicated that premature babies gain a mean of 150 grams per month (assume σ = 22.3) .  The nurse is researching a new program that has the goal of increasing the mean weight gain in a month.   The nurse takes a random sample of 40 premature babies to participate in the program over the next month with a resulting sample mean weight…

Question 3 of 14 (12 points) Attempt 1 of 3 View question in a popup 6.3 Section Exercise 15 (ca Coffee: The National Coffee Association reported that 64% of U.S. adults drink coffee daily. A random sample of 225 U.S. adults is selected. Round your answers to at least four decimal places as needed. Part: 0/ 6 民 Part 1 of 6 (a) Find the mean A. The mean lln is ola

QUESTION 17 Find the t-value. Find the critical t-value that corresponds to 95% confidence and n = 16, O 2.602 1.753 O 2.947 O 2.131

QUESTION 3 We observe 10 components, starting from time t = 0. The component life times are independent. Observation ends immediately following the 7th failure, which occurs at time t = 13.48. Give (correct to 2 decimal places) an appropriate estimate for F(13.48), using the Mean ranking method.