n the state of Ohio, data has shown that 9% of adults are illiterate (lack basic reading and writing skills). In the state of Alabama, data has shown that 15% of adults are illiterate. Create a sampling distribution for the difference in the illiteracy rates between a sample of 300 adults from Alabama and a sample of 250 adults from Ohio.   Find the combined mean, standard deviation, and determine if the distribution is approximately normal. Show your work.

Q: (A2) if the standard error of the mean is 10 for N=12, what is the standard error of the mean for…

A: Given (A2): SE=10 for N=12 (A2): SE= 50, for N=25

Q: a successful basketball player has a height of 6 feet 9 inches, or 206 cm. Based on statistics from…

A: Given,           Z -score=4.45           A basket ball player has a height of  6 feet 9…

Q: in New York State, the mean salary for high school teachers in 2017 was $104,210 with a standard…

A: given X , follow normal distribution with μ=104210σ=9660

Q: Twenty-nine percent of adult Internet users have purchased products or services online. For a random…

A: It is given that 29% of the users purchase online. Therefore, probability of a randomly selected…

Q: A data set is formed by recording the sums in 400 rolls of a pair of a dice. A second data set is…

A: Standard deviation:The standard deviation indicates by how much each observation differs from a…

Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe…

A: It is given that the random variable follows a binomial distribution with n=6 and p=0.9.

Q: According to a survey by Harris Interactive conducted in February 2009 for the charitable agency…

A:

Q: The bank of America's VP feels that each saving account customer has, on average, 3 credit cards.…

A: The bank of America's VP feels that each saving account customer has, on average, 3 credit cards.…

Q: Twenty-five percent of commercial airline accidents are caused by bad weather. If 300 commercial…

A: The mean of the binomial random variable obtained by the formula μ=np, where (n) is the number of…

Q: The scores on an aptitude test are normally distributed with a mean of 18 and standard deviation of…

A: Note: Hey, since there are multiple subparts are posted, we will answer first three subparts for…

Q: According to Dietary Goals for the United States (1977), high sodium intake may be related to…

A:

Q: According to a government study, among adults in the 25- to 34-year age group, the mean amount spent…

A: Given : The mean amount spent per year on reading and entertainment is $1,994. Assume that the…

Q: c) For the normal distribution of burning times of electric light bulbs, with a mean equal to 1200…

A: Since you have posted multiple subparts , we will solve first three subparts  for you. To get the…

Q: Suppose that a large Introduction to Psychology class has taken a midterm exam, and the scores are…

A: (1) Obtain the proportion of the class got scores above 90. The proportion of the class got scores…

Q: Find the population standard deviation for the following scores: x = 2,45,2,6,3,2,9,10,11,34,64

A:

Q: In Pittsburgh, Pennsylvania, about 56% of the days in a year are cloudy. Find the mean, variance,…

A: Given, In a year 56% of days are cloudy. Now during June month 30 days. Each day is independent of…

Q: Suppose the true proportion of voters in the county who support an independent candidate for county…

A: We have given that,  True proportion or probability (p) = 0.42 Then,  q= 1 - p = 1- 0.42 = 0.58 q=…

Q: A marketing researcher for a phone company surveys 184 people and finds that the proportion of…

A:

Q: In an English test, the mean is 60 and the standard deviation is 6. Assuming the scores are normally…

A:

Q: 2. How is the sample size related to the deviation?

A: We have to define how sample size is related standard deviation

Q: In a chemistry general exam, the grades are approximately Normally distributed with mean 77 and…

A: We have to find out given probabiity.

Q: The mean number of travel days per year for salespeople employed by three hardware distributors…

A: Sample size: Sample is the part of the population that will help us to draw the inference about the…

Q: (e) How good was the Denver Broncos' 2013 NFL season compared to the rest of the football teams that…

A: We have to find out z score..

Q: The average full-time faculty member in a post-secondary degree-granting institution works an…

A: In a bell shaped distribution, 68% items falls within one standard deviation of mean, 95% items…

Q: On a normal distribution, four participants obtained the following deviation scores: –5, 0, +3, and…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: f the mean age of the managers in company is 52 years with a standard deviation of 2.5 years, what…

A:

Q: . Sheldon owns a mango farm and the weight of his mangoes are normally distributed with an average…

A: here  N = 800 n = 50 μ = 200 gramσ = 15 grams

Q: A professor at a local university noted that the exam grades of her students were normally…

A: Given,mean(μ)=73standard deviation(σ)=11

Q: The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is…

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

Q: A group of science students plans to take an SRS of 25 days in the year to see what proportion of…

A: Given that the students plans to take a SRS (simple random sample) of 25 days in the year where 41%…

Q: For a normal distribution where the mean is 50 and the standard deviation is 10, what percentage of…

A: The random variable X follows normal distribution with mean 50 and standard deviation 10. The…

Q: In a normal distribution, 31% of the items are under 45 and 8% are over 64. Find the mean and the…

A: Given Data: Let X represent the variable P(x<45)=0.31 P(x>64)=0.08   X~ Normal μ, σ2   To…

Q: Runzheimer International publishes data on overseas business travel costs. It reports that the…

A: The standard deviation will be obtained as given below:

Q: Mitsubishi which operates and manages car rentals for DMMMSU employees found that the tire lifetime…

A: Given For the first question μ=50000σ=3500   For the second question  μ=50σ=6

Q: On a normal distribution, at what percentage must a. The mean fall? b. The median fall? c. The…

A: Normal distribution, also known as the Gaussian distribution, is a probability distribution that is…

Q: A bookstore found out that 23 percent of their customers buy a book, 34 percent of their customers…

A:

Q: A manager is interested in finding the average number of sales per day at a sporting goods store. If…

A: Obtain the sample size. The sample size is obtained below as follows: The formula of sample size is,…

Q: The Institute for College Access and Success reported that 67% of college students in 2008 graduated…

A: The sample given is,n=85. It is also given that 67% of college students graduated with student loan…

Q: Sweet Rush is an ice cream shop chain that has locations all across the nation, Customers at Sweet…

A: Solution-: Given: μ=1.40,σ=0.85,n=10 We find, (a) μX¯=? (b) σX¯=?

Q: Suppose that the amount of sleep college students get per night has a symmetric, bell shaped…

A: Note: Hey, since there are multiple subparts posted, we will answer first three subparts. If you…

Q: At the local liquour store, a single purchase approximately follows a normal distribution with a…

A:

Q: High school students across the nation compete in a financial capability challenge each year by…

A: Given: Students who score in the top 19 percent are recognized publicly for their achievement by the…

Q: 4. The variance of a data set is 3410.56. Find the standard deviation for the data set.

A:

Q: Determine the point estimate, p and the sample standard deviation, S5.

A: here n = 439 x= 162 here x= no of students working full time while going to school

Q: The college board reports that in a recent year, the mean mathematics SAT score was 514, and the…

A:

Q: On average, accountants earn approximately an average of $6500 per year in the United States. Assume…

A:

Q: The average speed of 64 random cars traveling on a certain highway was 80 km/h and the sample…

A: We have given that,  Average speed (x̄) = 80 , standard deviation    (s) = 20, Confidence level(C.I)…

Q: The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is…

A: Let X is the gas mileage for a hybrid car. X~Normalμ=57,σ2=3.52

Q: SE Mean

A: Country- CHINA Sample size (n) =50 Sample mean (x¯) = 22.5  Standard deviation (σ)=9.75

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.