Question: Find the interval [ z n,+z n ] within which 95 percent of the sample means would be expected to fall, assuming that each sample

Find the interval [ z n,+z n ] within which 95 percent of the sample means would be expected to fall, assuming that each sample is from a normal population. (a) = 161, = 12, n = 47. (Round your answers to 2 decimal places.) The 95% range is from to . (b) = 1,317, = 21, n = 10. (Round your answers to 2 decimal places.) The 95% range is from to . (c) = 70, = 1, n = 27. (Round your answers to 3 decimal places.) The 95% range is from to

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Find ht interval [ z / n + z / n = within which 95 percent of the sample means would be expected to fall, assuming that each sample is from a normal population. a. = 200, = 12, n = 36 b. =...

Find the interval [ z / n + z / n] within which 90 percent of the sample means would be expected to fall, assuming that each sample is from a normal population. a. = 100, = 12, n = 36 b. =...

1. A researcher reports survey results by stating that the standard error of the mean is $22. The population standard deviation is = $132. How large was the sample used in this survey? a) 64 b) 55 c)...

A small amount of the trace element selenium, 507200 micrograms (pg) per day. is considered essential to good health. Suppose that random samples of n1 : n2 : 30 adults were selected from two regions...

Q1 - Independent random samples were selected from two quantitative populations, with sample sizes, means, and variances given below. Population 1 2 Sample Size 39 46 Sample Mean 9.4 7.3 Sample...

12. Here are summary statistics for randomly selected weights of newborn? girls: n=36?, x=3180.6?g, s=700.5g. Use a confidence level of 90?% to complete parts? (a) through? (d) below. a. Identify the...

Directions: Use the 4-step process in determining the interval estimate. Problem: A sample of 60 Grade 9 students' ages was obtained to estimate the mean age of all Grade 9 students. Consider that X...

8 For bone density scores that are normally distributed with a mean of 0 and a standard deviation of 1, find the percentage of scores that are a. significantly high (or at least 2 standard deviations...

Accounting Horizontal and vertical analysis for the year 2016, 2017, and 2018. Thanks ALIU MAR 22 2019 PILIPINAS SHELL PETROLEUM CORPORATION STATEMENTS OF FINANCIAL POSITION As at December 31, 2018...

Perkins Company owns 85% of Sheraton Company. Perkins Company sells merchandise to Sheraton Company at 20% above cost. During 2011 and 2012, such sales amounted to $450,000 and $486,000,...

1. Manually select 30 random days from 1 to 120, and the corresponding numbers of visitors at these days. Please do not repeat my sample. Number of Visitors to ad Website Day Number Day 1 250 1 250...

Oust the Turtle Company has the following balances on December 31, 2020: Cash on hand 4,500.00 Cash in bank A 33,000.00 Cash in bank X 50,000.00 Cash in bank C 822,999.72 Cash on hand includes $ 3....