PROBLEM 2 A table describes the temperature change in December 2017. Find the 0.94 confidence interval...
3.) For this problem you need to generate data so open the probability simulator on the TI calculator and set your seed (Use last 4 digits of your GCID). Select the Roll Dice simulator and set the number of trials to 16, and the number of Sides to 12. Execute Roll and save Data to a list. PROB SIM APP Call the corresponding random variable X. Settings Trial Set: 16 Dice: 1 2 3 Sides: 6 8 10 12 20...
30 The manager of the local Walmart Superright is studying the number of items purchased by customers in the evening hours. Listed below is the number of items for a sample of 30 customers. 15 12 5 8 4 6 6 7 11 9 8 14 9 12 5 4 10 6 18 10 6 10 11 5 10 9 13 12 13 5 2 01:40:06 Click here for the Excel Data File a. Find the mean and the median...
A researcher is interested in finding a 95% confidence interval for the mean number of times per day that college students text. The study included 141 students who averaged 25.7 texts per day. The standard deviation was 21.2 texts. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a tv distribution. 0 and b. With 95% confidence the population mean number of texts per day is between texts. c. If many groups of 141...
1. The mayor is interested in finding a 90% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 209 residents whose mean number of pounds of trash generated per person per week was 34.5 pounds and the standard deviation was 7.5 pounds. Round answers to 3 decimal places where possible a.With 90% confidence the population mean number of pounds per person per week is between ___...
Use the confidence level and sample data to find a confidence interval for estimating the population u. Round your answer to the same number of decimal places as the sample mean. 20) A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 20) 5.2 on a placement test. What is the 90% confidence interval for the mean score,, of all students taking the test? A) 27.8 <u <31. 2 B ) 28.2<u<30....
Find the range and standard deviation. The table below gives the number of hours spent watching TV last week by a sample of 24 children. 17 8 5 36 9 2 5 4 3 10 9 9 2 10 8 13 12 9 7 10 | Range = (Please enter an exact answer.) Standard Deviation = (Please show your answer to 4 decimal places.)
Question 3 2 A psychiatrist is interested in finding a 95% confidence interval for the tics per hour exhibited by children with Tourette syndrome. The data below show the tics in an observed hour for 12 randomly selected children with Tourette syndrome. 8 7 11 10 2 41 11 7 66 Round answers to 3 decimal places where possible. Sus Question 4 1 p You want to compute a 98% confidence interval for a population mean. Assume that the population...
Use Table F to find the ta/2 value for a 90% confidence interval for the mean when the sample size is 8
Problem 2- Confidence Interval The average cost per night of a hotel room in New York City is $273 (SmartMoney, March 2009). Assume this estimate is based on a sample of 45 hotels and that the sample standard deviation is $65. T- statistic is 2.015. a. b, c. With 95% confidence, what is the Margin of Error(ME)? what is the 95% confidence interval estimate of the population mean? Two years ago the average cost of a hotel room in New...
Question 7 2 pts Find the 98% confidence interval for the normally distributed difference between two population means in a paired difference sample given the following information: meand - 2.77, standard deviation Sd - 1.73, n= 10 O 10.99,4.55) O (0.89,4.45) O (119,4.35) (129.4.25) O (1.23,431)