A corporation that maintains a large fleet of company cars for the use of its sales staff is interested in the mean distance driven monthly per salesperson. Thefollowing list gives the monthly distances in miles driven by a random sample of 20 salespeople.2394, 2434, 1921, 2647, 2221, 2262, 1993, 2697, 2585, 2667, 2207, 2479, 2390, 2184, 2291, 2522, 2594, 2490, 2636, 2067Send data to calculatorSend data to ExcelBased on this sample, find a 90% confidence interval for the mean number of miles driven monthly by members of the sales staff, assuming that monthlydriving distances are normally distributed. Give the lower limit and upper limit of the 90% confidence interval.Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)escLower limit:Upper limit:I Don't KnowOSHIBA712Submit→# 3Xс$54Ś25%

Given data: Sample size= 20 Confidence level = 90%

Answered: A corporation that maintains a large…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A corporation that maintains a large fleet of company cars for the use of its sales staff is interested in the mean distance driven monthly per sales person. The following list gives the monthly distances in miles driven by a random sample of 20 sales persons. 2696, 2580, 2455, 2434, 1910, 2028, 2069, 2503, 2304, 1922, 2113, 2465, 2043, 1886, 1938, 1856, 2166, 1882, 2104, 2029 Send data to calculator Based on this sample, find a 95% confidence interval for the mean number of miles driven monthly by members of the sales staff, assuming that monthly driving distances are normally distributed. Then find the lower limit and upper limit of the 95% confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit:| Upper limit:
Suppose the mean price for used cars is $10,198. A manager of a Kansas City used car dealership reviewed a sample of 50 recent used car sales at the dealership in an attempt to determine whether the population mean price for used cars at this particular dealership differed from the national mean. The prices for the sample of 50 cars are shown in the file named UsedCars. 12,400 10,400 12,100 10,000 11,000 8,895 7,675 9,975 6,350 10,470 9,895 11,250 8,795 12,500 9,340 10,150 9,200 9,395 11,000 10,640 10,000 7,500 8,000 10,440 10,200 10,300 9,740 9,280 10,930 8,000 9,000 7,680 9,400 10,730 7,350 12,240 11,970 8,240 9,910 10,080 9,440 8,970 9,500 10,050 10,130 11,400 8,500 7,500 9,090 10,500 (a) Formulate the hypotheses that can be used to determine whether a difference exists in the mean price for used cars at the dealership. H0: ? ≤ 10,198 Ha: ? > 10,198 H0: ? < 10,198 Ha: ? ≥ 10,198 H0: ? = 10,198 Ha: ? ≠ 10,198 H0: ? > 10,198 Ha: ? ≤ 10,198 H0: ? ≥ 10,198…
A sample of 25 freshmen at a major university completed a survey that measured their degree of racial prejudice (the higher the score, the greater the prejudice) Compute the median and mean for these data? 10 43 30 30 45 40 12 40 42 35 45 25 10 33 50 42 32 38 11 47 22 26 37 38 10
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The following table summarizes the grade point averages (GPAs) of graduatestudents in a statistics class. Approximate the mean GPA of the class.
A retail survey asked college students how much they planned to spend in various categories during the upcoming academic year. One category is the amount students planned to spend on school supplies. The data below show the amount of money students planned to spend on school supplies. 58, 60, 67, 69, 70, 73, 74, 77, 78, 80, 83, 84, 87, 89, 94, 96, 97, 100, 102, 105 USE SALT (a) Calculate the mean and median for the distribution of money students planned to spend on school supplies. mean median (b) What is the 75th percentile of the distribution? (c) Determine the five-number summary. minimum Q₁ median Q3 maximum
In a city with three high schools, all the ninth graders took a Standardized Test, with these results: High School Mean Test Score Number of ninth graders (Frequency) Glenwood 81 284 Central 95 323 Lincoln 69 154 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 81, 95, and 69, which is 81.7. Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place. mean of all ninth grader's scores =
The average weekly incomes, in £s, of 18 selected occupations in the United Kingdom were: 244, 146, 278, 396, 435, 641, 577, 122, 294 357, 802 730, 286, 484, 169,, 559, 208, 498 Draw a box plot to represent these incomes. - UB = - Highest = - Q1 = - Q2 = - Q3 = - Lowest = - LB = Calculate the mean weekly income and the standard deviation.
Kara has five exam scores of 6363, 5959, 6767, 7575, and 7373 in her biology class. What score does she need on the final exam to have a mean grade of 7070?
Use the data set {13, 16, 17, 18, 19, 19, 20, 25, 27, 30, 35, 42} The data represent the ages of a random sample of people in line ride a roller coaster. Find the interquartile range (IQR).

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