An automobile club reported that the average price of regular gasoline in a certain state was $2.63 per gallon. The following data show the price per gallon of regular gasoline for 15 randomly selected stations in the state. Complete parts a through c below. 2.66 2.56 2.55 2.66 2.57 2.61 2.63 2.58 2.68 2.64 2.69 2.72 2.75 2.51 2.61 a. Construct a 95% confidence interval to estimate the average price per gallon of gasoline in the state. to $ The 95% confidence interval to estimate the average price per gallon of gasoline in the state is from $ (Round to the nearest cent.)

Q: 7.22 High school and beyond, Part II. We considered the differences between the reading and writing…

A: Solution: Given information: n=200 Sample size xd= -0.545 Difference of sample mean sd = 8.887…

Q: 7.24 Diamonds, Part I. Prices of diamonds are determined by what is known as the 4 Cs: cut, clarity,…

A:

Q: You are the manager of a restaurant that delivers pizza to customers. You have just changed your…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Given this formula 1 UCL ARL, where ß = SLCL N (µ1,dx %3D %3D 1-B

A: Given information, UCL=0.2002 LCL=0.1918 mean=0.1985 s=0.001392 n=240

Q: Collect data (or use hypothetical or from online source) on these two qualitative variables (gender,…

A: Contingency table is useful in bivariate data analysis.

Q: Which of the following is NOT true of R2? O It is a measure of effect size O It measures how well…

A: Given that  R2=coefficient of determination  r= correlation coefficient

Q: 1. A doctor claims that only 10% of all patients exposed to a certain amount of radiation will feel…

A: We have given that  Favourable cases, X = 5 Sample size, n = 18

Q: Q2. sample size is needed for the critical point t): Find the values of the critical points z and t…

A:

Q: A sample (X1, ..., X10) is drawn from a distribution with a probability density function. The sum of…

A: The probability density function for X is, fx=121θe-xθ+110e-x10, 0<x<∞ Consider, E(X)=∫0∞xfxdx…

Q: The number and frequency of a certain ocean's hurricanes annually from 1935 through 2010 is shown…

A: Given that

Q: Suppose we have a 12 sided fair die and we toss it 20 times. What is the expected value of the sum…

A: here die is 12 sided  so probability of roll each number  = 112 here no of toss  = 20

Q: 1. A sample of n =16 observations is drawn from a normal population with u = 1000 and o = 200. Find…

A:

Q: Given this formula 1 ARL, where ß = SLCL N (H, 1-B And L ICI is 0200 2 ICIis 0 10 10 mnan is 0 1005…

A: Given information, UCL=0.2002 LCL=0.1918 mean=0.1985 s=0.001392 n=240

Q: Consider a parameter 0 with density 7(0)=B'0*, where B>0 and y > 2. (a) Find the prior mean of 0.…

A:

Q: 11. A recent study of smoking cessation programs collected information about nicotine replacement…

A: Data: Total no. of people = 86+661+60+40+106+172+102+239 = 1466 P(patch) = (60+40+106+661)/ 1466…

Q: nds are due December 3: nnual interest rate, pay

A: It is given that brodie corporation acquired bonds with a par value of $600,000 for $628,800 on…

Q: Refer back to the data in Exercise 4, in which y = ammo- nium concentration (mg/L) and x…

A: Given that, y = ammonium concentration (mg/L) and x transpiration (ml/h). Summary quantities include…

Q: The failure time of a certain component has a Weibull distribution with B = 4, 0 = 2000, and y =…

A:

Q: Let E be the event where the sum of two rolled dice is divisible by 6. List the outcomes in E^c.

A: In question, Given that E be the event where the sum of two rolled dice is divisible by 6. Then…

Q: Alumni Contributions The director of an alumni association for a small college wants to determine…

A: The independent variable is Years. The dependent variable is Contribution. We have to find the…

Q: 40.Grade 10 is composed of 30 students. There are 3 boys and 27 girls. Suppose that a committee of 3…

A: If there are n mutually exclusive, exhaustive and equally likely outcomes of a random experiment and…

Q: In Riyadh region, past records revealed that 70% of all the high school graduates go to…

A: Let p be the probability that high school graduate goes to universities. Given that p = 0.70 Let X…

Q: Given the following scatterplot, if the point in the upper right corner were removed, what will…

A: Given a scatter plot and we have to choose the correct option related to correlation coefficient.

Q: A biologist interested in estimating the correlation between the body mass ( in grams) and body…

A:

Q: The following data represent the weights (kg) of a sample of the 37 students in one of the colleges.…

A: Solution-: We create frequency distribution table

Q: schizopherina , who stayed in the hospital the longest would score the lowest on a mental…

A: Given that ; X represent the Years of Hospitalization Y represents the Mental orienation.  By using…

Q: You're a sociologist studying whether grocery prices are different in the inner cities than they are…

A: Null hypothesis: H0:The average inner city prices are equal to suburban average prices. Alternative…

Q: You sample 16 people in a high school to try to predict GPA in 10th grade from GPA in 9th grade. You…

A: Given that, You sample 16 people in a high school to try to predict GPA in 10th grade from GPA in…

Q: In the formula for an analysis of variance, we want between-group variance to be and within group…

A:

Q: A company wishes to know whether advertising expenditure is related to sales volume. Using the past…

A:

Q: You'd like to test the null hypothesis that the means of the two samples (column A and column B) are…

A: Test Statistic for testing 2 means  t is given by, t=     H0: The means of X1 and X2 are same.  H1:…

Q: Below are four data sets and descriptions, given as a list or a table. State which are categorical…

A: Qualitative data: The data which cannot be expressed as numerically is called qualitative data.…

Q: What is your crtitical t-value? tcritical= 1.078 1.087 1.708 1.870

A: Given that  Sample sizes n1=16 , n2=16 Sample mean x1=50 , x2=47 S12 =9 , s22 =25

Q: 61,837 346,146 448,119 500,521 89,678 221,803 314,404 41,754 373,154 94,310 399,190 297,083 391,098…

A: *Answer:  Standard quota is calculated by dividing the total population with the number of seats.…

Q: The mean starting salary offered to graduating students with a certain major in a recent year was…

A: Solution

Q: A time series dataset consists of 100 observations x,x,., x,00. The following summary statistics…

A:

Q: Help me solve this 17 parts remaining ne claim is that for 9 AM body temperatures of females, the…

A: Given that  Sample size n =33 Population mean =98.6 Test statistic t= - 4.786

Q: The slope b and the correlation r always have the same sign. For example, if the correlation is…

A: Given: Statement: sign of slope and correlation always have the same sign.

Q: There are 3 states and 20 seats. In 20 years, the number of seats was increased to 21. Suppose the…

A:

Q: According the World Health Organization, the Body Mass Index (BMI=Weight in Kilograms/Height in…

A: For the given data Conduct a  ----- tailed test

Q: A random sample of 20 college men's basketball games during the last season had an average…

A: The random variable attendance of a college men’s basketball game follows normal distribution. We…

Q: Which of the following is the appropriate null and alternative hypotheses for the test described in…

A:

Q: 5. For a standard normal distribution, what is the probability that z is less than 1.25? A) 0.8944…

A: (5)  Let Z be the random variable from standard normal distribution with mean = 0 and standard…

Q: Practice with thet distribution. An independent random sample is selected from an ap- proximately…

A: 1. Given information: n=7 df=n-1=7-1=6 Confidence level is 80% Significance level is 20%

Q: local church parish wants to raise money to add to their campus. In a sample from a previous fund…

A:

Q: Two standard dice are rolled. Find the following: a. What is the probability of having an…

A: The possible outcomes for throwing two dice are, (1, 1). (1, 2), (1, 3), (1, 4), (1, 5), (1, 6) (2,…

Q: se the formula in this example to determine the sample size, n. The estimated prevalence is 19%,…

A: Given that,

Q: A grandmother leaves all of her assets to a charity except three items. She leaves her house, a car,…

A: Grandchild 1's total value is 150+6+3= 159 Share is 159/3= 53 Grandchild 2's total value is 170+8+5=…

Q: Select the closest answer to the specified areas for a normal density. Round to the threee decimal…

A:

Q: 4, The hardness of ten steel samples was measured and the results were as follows. 1 2 8. Sample…

A: