You think your car’s fuel efficiency is much lower than it should be. The average fuel efficiency of your car that the car manufacturer claim is 27 mpg. Your car’s fuel efficiency is 22 mpg. A). which test would be conducted, z-test or t-test, and why?

Q: Use the table below to answer this quesiton:   Leukemia  No leukemia  Exposed to benzene…

A: Risk of something is the odds of it taking place. The absolute risk of something happening is the…

Q: Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of…

A: Given data and calculation is shown below x y x2 y2 xy 29 30 841 900 870 44 19 1936 361 836…

Q: The quality control engineer at a bottling plant keeps track of the number of bottles that are…

A: Denote p as the true population proportion of overfilled or underfilled bottles.

Q: Which has more uniform pressure? If prices are the same, which manufacture’s bag would be preferred…

A: Dispersion measures the variation in a data set.

Q: (d) The probability that a randomly selected hybrid gets less than 45 miles per gallon is (Round to…

A: X follows a Normal distribution with mean = 57 and S.D = 3.5 Then z=(x-mean)/SD = (x-57)/3.5…

Q: (c) Compute the test value. Re

A: Given that the sample size is n = 298 Number of households that had two or more television sets, X =…

Q: A drug manufacturer claims that a drug of its own production is 90% effective in relieving allergies…

A: Hypothesis testing is used to make conclusions about the population parameter. The hypothesis test…

Q: The percentage of hands that are winning blackjack hands is enter your response here​%

A: Since we have calculated probability of selecting a black jack hand is P(Black Jack hand) = 64/1326…

Q: The fuel efficiency, in miles per gallon, of 10 small utility trucks was measured. The results are…

A: Given that  The fuel efficiency in miles per gallon Sample size (n) = 12 The data as follows  23, 25…

Q: You want to determine whether the gas mileage (in miles per gallon) and the speed that an automobile…

A: Introduction: It is required to identify the most appropriate test for the given research question.

Q: Dr. Castillejo feels that the maximum pulse rate during the run is a good predictor in explaining…

A: Here the slope coefficient : Slope = 0.132698 The slope is positive which shows that there is a…

Q: Out of 1000 residents of Eagle County surveyed, 590 of them feel that their children receive a good…

A: There are two independent samples which are Eagle County and Beaver County. We have to construct 95%…

Q: What is the CALCULATIONS FOR THE t TEST?

A:

Q: A medical researcher says that less than 82% of adults in a certain country think that healthy…

A:

Q: In a class in which the final course grade depends entirely on the average of four equally weighted…

A: Let the score in 4 th digit   be xThen average of scores in 4th subject is ,   A= 95+85+74+x4…

Q: What is the value of a?

A: Given expression: a+x5 Also, given that co-efficient of x2 is 640. We need to find the value of a.

Q: he result for a Pearson’s r for students’ perceived learning and their sense of community was, r(45)…

A: The sample correlation, observed from a sample size of n=45, is r(45) = r = 0.72 while the…

Q: The adhesion resistance of 12 energetic materials (explosives, fuels and pyrotechnic compositions)…

A: a) For the given sample values, Mean=213, obtained from the Excel function, =AVERAGE(P1:P12)…

Q: What is the measure of Z?

A:

Q: To gauge the reactions of possible customers, the manufacturer of a new type of cellular telephone…

A: The Cramer's V is used to measure the strength of relationship between two variables. If the…

Q: which method has better accuracy simpson's 1/3 rule or simpson's 3/8 rule?explain

A: Simpson 13rd rule for a function g(x) over the interval [a,b] with "n" partitions is defined as…

Q: . Two soft drink dispensing machines should dispense 8 oz of your selection into a cup. The table…

A: Two measures of dispersion variance and range has compared.

Q: The manifacturer of a certain brand of cigarettes claims that the average nicotine cintebtbdoes not…

A: Given: μ0=2.5 mg

Q: he given quantities below were calculated from a sample data set. Σ 1-230 Συ- 198 Ey = 2664 Σ II 2 =…

A: Given data,

Q: What is the value of A?

A:

Q: In one of his Subsidiaries, sheltron, gasoline is stocked in a bulk tank each week. Let x denote the…

A: Given that  X: proportion of tank's capacity stocked per week Y: proportion of tank's capacity sold…

Q: The following data are given for a biogas digester suitable for the output of six cows. The volume…

A: Number of cows =6 Volume of digester =8.8 m3  Volume of gas holder =3 m3 Retention period =23 days…

Q: DA simple sample of heights of 6400 English men has a meal of 170cm and a S.D. of 6.4 cm, while a…

A: Note: We'll answer the first question since the exact one was not specified. Please submit a new…

Q: We want to test the claim that the proportion of music industry management who rate a sense of humor…

A: We need to identify appropriate test statistic

Q: e) what is heis var (w)?

A: e) Obtain the value of Var(X)   The value of Var(X) is obtained below as follows:   Let X be the…

Q: To determine if chocolate milk was as effective as other carbohydrate replacementdrinks, nine male…

A: If the difference between two measure in one sample is calculated using the paired t-test. It is…

Q: If the average of z and 5z is 30, what is the value of a?

A: Given that avarage value of z and 5z is 30.

Q: local fast-food res et y denote the ca

A: The nine randomly selected customers at a local fast-food ordered restaurant meals having the…

Q: J 49+14

A:

Q: Two different methods can be used for measuring the temperature of the solution of a Hall cell used…

A: The independent variable is Thermo couple. The dependent variable is IR. We have do regression…

Q: Is the difference of means significant ? The value of t for 9 degress of freedom at 5% level is 2.26

A:

Q: A researcher reports t(22) = 5.30, p <.01 for an independent-measures research. How many individuals…

A: From given that , A researcher reports t(22) = 5.30, Degrees of freedom  df = 22

Q: What is the standard error for the difference between the two means

A: here from given information  For Private  sample mean = x¯  = 42.5  s2x = 48.7 nx =  10   For pubilc…

Q: Explain what Cohen's d and r2 measure when calculated for a t test

A: Cohen's d is an effect size used for the standardized difference between two means to be indicated.…

Q: what is e valueofECv-Z)² fr 43,4? Scores

A: What is the value of ∑(x-2)2  for scores x={1,3,4}

Q: A runner does 1/2 miles warm up, followed by 5 x1 mile aerobic intervals with 3 minutes rest between…

A: Consider the equation

Q: How to Compute t and p for the difference between means?

A:

Q: The following data are given for a biogas digester suitable for the output of six cows. The volume…

A: A biogas digester suitable for the output of six cows. The volume of dig ester is 7.5 m3 and the…

Q: Scores on an accounting exam ranged from 42 to 92, with quartiles Q1= 59.00, Q2= 79.0, and Q3=82.25.…

A: (a) Procedure for constructing boxplot: The x-axis represents the units of data values ranging from…

Q: A population with a mean of u = 8 has EX = 40. How many scores are in the population? %3D

A: Given information- Mean, µ = 8 ⅀X = 40 We have to find how many scores are in the population. Let, N…

Q: The pass result of fifty students who took up a class test is given below : Marks Number of Students…

A:

Q: For testing H,: M=o V.S H;: M>O at level of significant 0.01 and n=16, d'=5, S=2, the T is اختر احدى…

A:

Q: t is thought that basketball teams that make too many fouls in a game te co lose the game even if…

A: Note: “Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: Fill out the table below and calculate the y statistic and degrees of freedom. Blackjack Preserve…

A: The Chi square χ2 test statistic formula is defined as below         χ2=∑Oi-EI2EI Where, Oi is the…