round 1 results Question 7056: Enter number 7 An analyst constructed a confidence interval for the average age of its customers by taking a sample of 9 customers The average age of the 9 customers was 32.7 years and the standard deviation was 4 0 years If the 90% confidence inteorval for the true average age of the customer population is 32.7 x years, what is x? Round your answer to three decimal places Click here to onena.Standard Normal table in a new window. Cickhere to open a T-Distribution Table in a new window.

round 1 results Question 7056: Enter number 7 An analyst constructed a confidence interval for the average age of its customers by taking a sample of 9 customers The average age of the 9 customers was 32.7 years and the standard deviation was 4 0 years If the 90% confidence inteorval for the true average age of the customer population is 32.7 x years, what is x? Round your answer to three decimal places Click here to onena.Standard Normal table in a new window. Cickhere to open a T-Distribution Table in a new window.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question 2 Save On a history test Patrick received a grade of 43 out of 50. The class mean was 35 with a standard deviation of 6. His girlfriend Kristin, in another section, received a grade of 87 out of 100. Her class mean was 75 with a standard deviation of 10. z-score for Patrick's grade (round to two decimal places) z-score for Kristin's grade = (round to two decimal places) Who received the higher grade relative to their respective classes? Why?
Please help me to explain this questions in steps. Thank you.
CHALLENGE 5.2.1: Confidence intervals for population means. ACTIVITY 336780.1709078.qx3zay7 Start Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 3 inches. The heights of 9 randomly selected students are 62, 61, 60, 64, 68, 73, 73, 74 and 61. * = Ex: 12.34 Margin of error at 99% confidence level = Ex: 1.23 99% confidence interval = [ Ex: 12.34 Ex: 12.34 ] [smaller value, larger value] 1 2 Check Next
please help me solve step 2 and 3. i already answered some question. topic os known standard deviation. thanks
A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. The mean is found to be 7.8 reproductions and the population standard deviation is known to be 2.2 If a sample of 697 was used for the study, construct the 85% confidence interval for the true mean number of reproductions per hour for the bacteria. Round your answers to one decimal place
#6 Resolve for one mean T procedure
work shown would be so appreciated
I need help on step 1