2. In a sample of 900 gas stations, the mean price of regular gasoline at the pump was P54.04 per liter and the standard deviation is P0.42 per liter. From this population, a random sample is drawn of size: а. 30. b. 55.

Q: etime of electronics: In a simple random sample of 100 electronic components produced by a certain…

A: Given: Sample size(n ) = 100 Sample mean x¯=125     Population standard deviation σ =20

Q: Liquid suspensions are commonly used in children's medications. There is a concern about liquid…

A: The margin of error is,

Q: What is the value of the y-intercept of the least-squares regression line for these data? Round your…

A: The given data is,  Temperature(x) Coffee sales 74.4 2014.3 74.8 1495.8 73.5 1690.8 56.6…

Q: Andrea Anemone borrowed money to buy a car at 13.5% simple interest from her credit union. If the…

A: Given that rate of interest is r= 13.5%  Time is t= 2 years.  Amount of interest is S.I.= 27000.

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: A motor club wishes to estimate, to within five cents, the mean price of a gallon of gasoline in a…

A: Given information: A motor club wishes to estimate to within five cents. ME=5 Population standard…

Q: activity A given the following information: X= Daily cost of the crew and tools/equipment required…

A: Given Chart of variable, Mean and Standard Deviation Find Determine 2 side 95% confidence interval…

Q: a. Adding sensitizing rules to a Shewhart control charts is encouraged because they do not change…

A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, as per…

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

A: The null hypothesis is: H0:µ1= µ2 The alternative hypothesis is: H1:µ1≠ µ2

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

A:

Q: a. What is the advantage of the interval estimate over the point estimate? Explain clearly. b. Write…

A: We know that the Point estimate is the approximate value of the parameter.  And interval estimate is…

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: Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a…

A: Given that

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: 7)

A: Given that, n=10,SX=15SY=6SXY=20

Q: Which of the following is NOT one of the characteristics of a regression line? O It is used to make…

A: We need to choose,  which of the given statements is NOT the characteristics of a regression line.

Q: How many courses are you taking this semester?…

A: For the given data Perform t test for one sample

Q: 4. Estimation based on a function of the observation. Let O be a positive random variable, with…

A: Given X=ΘW Find a and b part

Q: In the population of students at Milpitas High School, the proportion who are in the marching band…

A: Given that  Population proportion p=0.10 Sample size n =100 Sample proportion p^=0.04

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

A:

Q: We have a large dataset which we denote by D1, with values x1, x2, x3, ..., xN. Its mean is denoted…

A:

Q: 1. The data given below are the heights (in cm.) of 12 boys who are particip a basketball…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Question: You are given that e(0) = 25, S(x) =1- x/w, O less than or equal to x less than or equal…

A:

Q: A majority of Pew Research Center surveys are conducted among the U.S. general public by telephone…

A: Random sample is essential to hypothesis testing.

Q: Research is being done to answer the question, Do teenage boys tend to date teenage girls who have a…

A: There are two dependent samples which are boys and girls. We have to test whether the boys have a…

Q: A political candidate wants to enter a primary in a district with 100,000 eligible voters, but only…

A:

Q: 4. Entry to a certain University is determined by a national test. The scores on this test are…

A:

Q: The next 10 questions refer to the following scenario. The average student studies eight hours for a…

A: Given that  Sample size n =25 Sample mean =87 Population mean =84

Q: A bank collected data of all its customers. Customers who repaid their consumer loans (Good Credit)…

A:

Q: When the correlation between X and Y is zero, the best prediction of Y for a given value of X is The…

A: Here we have to choose the correct option When the correlation between X and Y is zero, the best…

Q: Five hundred randomly selected automobile owners were questioned on the main reason they had…

A: Hypothesis test is one of the most important inferential statistical procedures.

Q: Grey Manufacturing Company expects sales to total 14,400 units In the first quarter, 13,000 units in…

A:

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

A: Given the formula for confidence interval of t distribution.  We have to find the critical value C…

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

A: Null Hypothesis: H0: The means of the two samples (column A and column B) are the same. Alternative…

Q: Which would be the appropriate command in Excel to calculate the following? What is the probability…

A: Given: n = 13 x = 6 p = 0.80

Q: ams/Height in Meters“) of a healthy 5-year old got liberated from the Islamic State, the World Foe…

A: Given, sample size (n) = 225 sample mean (x̄) = 14.5785  sample standard deviation (s) =  2.25…

Q: Use the t-distribution to find a confidence interval for a difference in means - given the relevant…

A: Solution-: Given: n1=400,n2=200,x1¯=504,x2¯=450,s1=103,s2=85,α=0.01 We find, (a) Best estimate=? (b)…

Q: State Farm Insurance studies show that in Colorado, 65% of the auto insurance claims submitted for…

A: Given that  n=8 , p=65%=0.65 , q=1-p=1-0.65=0.35 R~Binomial(n=8,p=0.65) r be the number of claims…

Q: A random sample of 25 students were asked to self-identify as "statistics-lovers" or…

A:

Q: A food company sells salmon to various customers. The mean weight of the salmon is 29 lb with a…

A: Given that

Q: 4. 66% of Americans support death penalty (Gallup, 2004). Seven people are randomly selected. Let…

A: Given that  n=7 , p=66%=0.66 X~Binomial(n=7,p=0.66)

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

A:

Q: The distribution of room and board expenses per year at a four-year college is normally distributed…

A:

Q: MAKE SURE YOU SELECT 2 ANSWERS FOR THIS QUESTION - Type of test and hypothesis. Professor Ratzo…

A: Given : Number of rats gets buttered bread = 10 Number of rats cheddar cheese bread = 10 Number of…

Q: A normal distribution has a mean of 85.6 and a standard deviation of 4.83. Find the data value…

A: Given that  X~Normal(μ=85.6,σ=4.83) Z=0.75 Formula for Z-score  Z=(X-μ)/σ

Q: O Po UOT Find the oritical value(s) and rejection region(s) for the indicaled Hest, level of…

A:

Q: If the following scores are ranked from smallest (#1) to largest (#9), what rank should be assigned…

A: Given that  The data are 1,1,1,1,1,3,6,6,9

Q: (a) If Sally uses 3 test kits what is the probability that at least one will return a positive…

A: here given , Sally has caught COVID but doesn’t know it yet. She is testing herself with rapid…

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: Determine whether the normal sampling distribution can be used. The claim is p > 0.25 and the sample…

A: Given that ;  P = 0.25 n = 18 By using the thumb rule of normal distribution 1) np > 5 2) n ( 1-…