016 protection agency gives data on 1170 vehicles. There are some high outliers mainly hybrid gas-electric vehicles. If we ignore vehicles identified as outliers, however the combined city and highway gas mileage of the other 1146 vehicles is approximatley normal with a mean of 23.0 mpg and std 4.9mpg The 2016 volkswagen beetle with four cylinder 1.8 L engine and auto transmission had combined gas mileage of 28.0 mpg  Find percentage of 2016 vehicles that have better gas mileage than the beetles gas mileage. enter answer in a percentage

Q: (d) Find the p-value. (Round to three or more decimal places.) (e) Can we conclude that the mean IQ…

A: Given that  Sample size n =21 Sample mean =115 Standard deviation=11

Q: 12. The red blood cell count for a population of adult males can be approximated by a normal…

A: We have given that  X~N( μ , ?^2 )    μ = 5.4    , ? = 0.4   Z-score =( x - μ )/?  ,

Q: two classes, one with 18 students and one with 21 students, took an assesment and obtained an…

A: The overall mean is, x̄ = 55.0.The number of students in class 1 is, n1= 18.The mean score of the…

Q: Unfortunately, arsenic occurs naturally in some ground water. A mean arsenic level of m= 8.0 parts…

A:

Q: An investigator decided to conduct a research to describe the average number of females in each…

A: Given, An investigator decided to conduct a research to describe the average number of females in…

Q: A Seattle consumer agency believes that plumbers’ rates are too high and wants to estimate the mean…

A: GivenConfidence Interval(c)=95%Margin of Error(E)=3%=0.03Let…

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: A professor want to estimate the mean  weight of 1 specific cookie. How many people must he sample…

A: Given, Margin error (E) = 0.6 Standard deviation = 1   The objective is to find the sample.…

Q: 1. The mean serum level measured in 12 patients twenty-four hours after they received a newly…

A: Hypothesized Population Mean (µ) = 1 mg/dl The provided sample mean is = 1.2 mg/dl Sample standard…

Q: Between what two values of Z (symmetrically distributed around the mean) will 95.44% of all possible…

A:

Q: The highway mileage (mpg) for a sample of 8 different models of a car company can be found below.…

A: Given data is19,22,26,28,29,31,34,34sample size(n)=8

Q: If the Age by Maternal Diet(alcohol vs non alcohol) interaction is significant, describe the…

A: Describe the interaction effect of age by maternal diet: The mean and standard deviation of…

Q: 1. Exercise: Medical researchers conducted a study to determine whether treadmill exercise could…

A: From the provided information,

Q: semester. After the semester is over these 121 students are given a reading comprehension test.…

A: From the above data We are given that  The average score for Indiana public school 6th graders on a…

Q: A vending machine is designed to dispense a mean of 7.8 oz of coffee into an​ 8-oz cup. If the…

A: Let X be the random variable from Normal distribution with mean (μ) = 7.8 and standard deviation (σ)…

Q: the widget weight have a mean of 61 ounces and a standard deviation of 5 ounces. 99.7 of the widget…

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: If the variance of a national accounting examination is 828, how large a sample is needed to…

A: Given data: Variance  = 828 Margin of error = 4 points Confidence level = 99 % To calculate the…

Q: A researcher wants to know if there is a difference in how busy someone is based on whether that…

A: To test if there is any difference in how busy someone is based on whether that person identifies as…

Q: If the main effect of age is significant, describe the main effect of age. Include the overall means…

A: Main effect in the Analysis of Variance test is the effect of one the independent variable on…

Q: A researcher fails to find a significant difference in mean blood pressure in 36 matched pairs. The…

A:

Q: calculate that the mean age of students, where 30 is the mean and standard deviation is 6. Between…

A:

Q: any impact on people's behavior. Before the new tax, convenience stores in the city sold an average…

A: Given average of μ = 410, sugar filled beverages per day with (Sigma) = 60. sample of n = 9 days…

Q: If the highest paid soccer platyer has his salary doubled, which of these will change? Can you…

A: We have to find correct options which will change.

Q: An investigator decided to conduct a research to describe the average number of females in each…

A: The number or values calculated from the sample data are called sample statistics. The number or…

Q: In a moderately asymmetrical distribution the values of mode and mean are 32.1 and 35.4…

A: Solution:

Q: One of the most feared predators in the ocean is the great white shark. It is known that the white…

A:

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: Unfortunately, arsenic occurs naturally in some ground water. A mean arsenic level of u = 8 parts…

A: One sample z-test: One sample z-test is used to test the significance difference between population…

Q: ons with a z-score between Z₁ = 0.53 and 22 = 2.26. Give your answer to four decimal p ns with a…

A: (a) The objective is to find the proportions with a z-score between z1=0.53 and z2=2.26

Q: According to Our World in Data, male heights follow a normal distribution with µ =178.4 cm and o=…

A:

Q: A psychologist is studying smokers' self-images, which she measures by the self-image (SI) score…

A:

Q: Condé Nast Traveler conducts an annual survey in which readers rate their favorite cruise ship. All…

A: Sample Size Sample mean Population S.D Sample 1 n₁ = 37 x̅₁ = 85.36 σ₁ = 4.55 Sample 2 n₂ = 44…

Q: In hundreds of studies with many thousands of participants, first-born children scored better than…

A: Solution: Given information: x1= 469  Sample mean of first born x2= 456  Sample mean of second born…

Q: To test the effect of alcohol in increasing the reaction time to respond to a given stimulus, the…

A: The following information has been provided: Before After d=μd=μbefore-μafter 3 8 3-8=-5 5 9…

Q: The average triglyceride level of adult males is 126 milligrams per deciliter. You want to determine…

A: Step 1: From the provided information, Step 2:Hypotheses and test statistic:The hypotheses can be…

Q: Suppose a new drug is intended to improve walking distance in patients with Parkinson’s Disease. A…

A: The researcher measures patients’ walking distance in feet before and after trying the drug for 9…

Q: As the sample size increases, standard error of the mean decreases. Explain whether or not this…

A: Given : Assertion : As the sample size increases, standard error of the mean decreases

Q: A company makes high-definition televisions and does not like to have defective pixels.…

A: (a) To test if the new method is significantly better than the old one at the α = 0.05 level, we can…

Q: What are the null hypothesis (H) and the alternative hypothesis (H,) that should be used for the…

A: Test is that whether the mean mileage of cars rented in the U. S. this year is different from last…

Q: Smoke-Free Legislation and Asthma Hospital admissions for asthma in children younger than 15 years…

A: Group 1: Before the smoke free legislation Sample mean=5.2%  Standard error =0.7%  Group 2:  We…