Solution:- Given that samples 24,18,22,20,18,19,16,16,20,18,20,18,21,18,18,19,16,17,16,21,17,21
X = 18.77 , s = 2.16 , n = 22, df = 21
95% confidence intrval for the t = 2.080
95% confidence interval for the population mean = X +/-
t*s/sqrt(n)
= 18.77 +/- 2.08*(2.16/sqrt(22))
= ( 17.81 , 19.73 )
b. option C.
The data below represents the overall miles per gallon (MPG) of 2008 SUVs priced under $30,000....
The data below represents the overall miles per gallon (MPG) of 2008 SUVs priced under $30,000. 22,18,21,23,20,18,17,18,21,18,18 18,22,18,16,18,18,16,15,20,18,23 Construct a 95% confidence interval estimate for the population mean miles per gallon of 2008 SUVs priced under $30,000, assuming a normal distribution. ____≤ μ >_ ___
The data below represents the overall miles per gallon (MPG) of 2008 SUVs priced under $30,000. Complete parts a and b below. Start 2 By 1 Matrix 1st Row 1st Column 21 comma 20 comma 22 comma 23 comma 18 comma 19 comma 18 comma 16 comma 18 comma 20 comma 20 comma 2nd Row 1st Column 16 comma 22 comma 19 comma 16 comma 17 comma 16 comma 18 comma 16 comma 20 comma 15 comma 22 EndMatrix a....
The table below contains the overall miles per gallon (MPG) of a type of vehicle. Complete parts a and b below. 21 32 20 20 31 20 25 35 34 25 45 32 26 30 a. Construct a 99% confidence interval estimate for the population mean MPG for this type of vehicle, assuming a normal distribution. The 99% confidence interval estimate is from MPG to MPG Round to one decimal place as needed.) b. Interpret the interval constructed in (a)....
The table below contains the overall miles per gallon (MPG) of a type of vehicle. 28 29 24 22 29 32 23 25 35 32 35 23 26 34 Choose the correct answer below. A.We have 95% confidence that the mean MPG of this type of vehicle for the sample is contained in the interval. B. 95% of the sample data fall between the limits of the confidence interval. C. The mean MPG of this type of vehicle for 95%...
The table below contains the overall miles per gallon (MPG) of a type of vehicle. Complete parts a and b below. 29 23 32 33 22 20 20 23 24 27 43 23 30 25 Construct a 99% confidence interval estimate for the population mean MPG for this type of vehicle, assuming a normal distribution. The 99% confidence interval estimate is from ___ MPG to ___ MPG. (Round to one decimal place as needed.)
The data set below contains the overall miles per gallon (MPG) of 20 small SUVs from one year. Complete parts (a) and (b). 26 26 24 22 22 22 22 21 21 22 20 20 21 21 21 21 21 21 21 21 Decide whether the data appear to be approximately normally distributed by comparing data characteristics to theoretical properties. Based on the theoretical properties of the normal distribution, do the data appear to be approximately normally distributed? yes/no THE...
2) In order to develop a confidence interval for the average miles per gallon (MPG) for a brand of hybrid car, a simple random sample of 97 cars is selected from the population of 10,000 cars manufactured. The 97 cars had a sample mean MPG of 51.9 MPG and a sample standard deviation of 4.5 MPG. (6 points) a) Compute a 99% confidence interval for the average miles per gallon (MPG) for this brand of car. b) Imagine that an...
8.2.19-T The table below contains the overall miles per gallon (MPG) of a type of vehicle Complete parts a and b below 24 24 20 26 24 29 35 23 28 20 44 31 25 22 a. Construct a 95% confidence interval estimate for the population mean MPG for this type of vehicle, assuming a normal distribution The 95% confidence interval estimate is from (Round to one decimal place as needed) MPG to MPG 8.EOC.57-E Question Help A consulting firm...
8.19 The file Sedans contains the overall miles per gallon (MPG) of 2013 midsized sedans: 38 26 30 26 25 27 22 27 39 24 24 26 25 23 25 26 31 26 37 22 29 25 3321 21 Source: Data extracted from "Ratings," Consumer Reports, April 2013, pp. 30-31. a. Construct a 95% confidence interval estimate for the popula- tion mean MPG of 2013 family sedans, assuming a normal dis- tribution. b. Interpret the interval constructed in (a). c....
3.12 The file SUV contains the overall miles per gallon (MPG) of 2015 small SUVs: 26 22 24 22 26 21 24 25 28 24 22 21 22 21 24 23 23 22 21 22 Source: Data extracted from "Which Cars Is Right for You,” Consumer Reports, April 2015, pp. 60-61. a. Compute the mean, median and mode. b. Compute the variance, standard deviation, range, coefficient of variation, and Z scores. C. Are the data skewed? If so, how? d....