Find the Mean and Standard Deviation for the prompts below: A survey found that 21% of Americans watch the fireworks on the 4th of July from their TV.  If 80 Americans are surveyed, would it be unusual to have less than 10 watch the fireworks from their TV?  Explain.

Q: Answer the next 2 questions using the following information. The US Department of Energy reported…

A: The hypotheses can be constructed as: Null hypothesis: H0: p = 0.517 Alternative hypothesis: H1: p ≠…

Q: Nationally, 80 percent of adults own an thermometer. You are interested in whether the same…

A: We have given that  Sample size n = 100 Sample proportion p^=75%=0.75 Population proportion…

Q: If a population has a mean of 25, what is the mean of the sampling distribution of its mean. Please…

A: Given,population mean(μ)=25

Q: Michelle, a telemarketer makes six phone calls per hour and is able to make a sale on 30% of these…

A: The random variable X is making sales. The number of cars per hour is 6. The probability of making a…

Q: Many athletes (and their parents) worry about the risk of concussions when playing sports. A…

A: First let us sort the head circumferences (in inches) for the players on the team; No. Head…

Q: Complete the following statement. If you are asked to find the 85th percentile, you are being asked…

A: If you are asked to find the 85th percentile, you are being asked to find

Q: The mean of the following data is 70. Find x:  47,56,x,79,86

A:

Q: If you have the following test scores: 84, 66, 78, 96, 60, and 72, what is your mean test score?

A: The answer is given below:

Q: A large chemistry course took their final exam. The mean was 75 with a standarddeviation of 8. a.…

A: Let us define the random variable , X. Let X represent the final exam scores. Here X follows Normal…

Q: As a group, the Dutch are among the tallest people in the world. The average Dutch man is 184 cm…

A: Given mean is 184 and standard deviation is 8.

Q: 4. A car salesperson notes that she sells either 1, 2, 3, 4, 5 or 6 cars per week with equal…

A:

Q: The Biglock car dealership collected a sample of 1000 pre-owned cars for miles were driven. The…

A: We have given, The Biglock car dealership collected a sample of 1000 pre-owned cars for miles were…

Q: The Taylors have recorded their weekly grocery expenses for the past 16 weeks and determined that…

A: Given The total number of weeks=16 Mean=$84.30 1 week's recorded expense is $48 but actual expense…

Q: company manufactures batteries in batches of 6 and there is a 3% rate of defects. Find the mean…

A: From the provided information, The defect rate = 3% that is p = 0.03 Total batteries in a batch (n)…

Q: In a survey of 400 items in a production line, it was discovered that 10% are defective. What is the…

A: Given the survey of 400 items in a production line.The percentage of defectives is 10%,Let n = 400…

Q: The mean salary of twelve men is $52,000, and the mean salary of four women is $85,000. Find the…

A: From the given information,

Q: Within what interval would you expect the sample mean to fall, with 98 percent probability?

A:

Q: The scores on a statewide chemistry exam were normally distributed with ?=73.08 and ?=6. Gabriela…

A: Given data isMean(μ)=73.08standard deviation(σ)=6

Q: What is the p value if the mean is 98.6, n=7, t= -2.114?

A: The P-value is the probability that provides strong evidence in favor of the alternative hypothesis.…

Q: Donde the mean, median, and mode for the following sample of scores, 5,4,5,2,7,1,3,5

A: From the provided information, The data set is as follow: 5, 4, 5, 2, 7, 1, 3, 5 The mean of the…

Q: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair…

A: Obtain the value of mean.   The value of mean is obtained below as follows:   Use EXCEL Procedure…

Q: d. The degrees of freedom = e. The test-statistic for this data (Please show your answer to three…

A: d. Degrees of freedom: df=number of categories-1   =4-1   =3

Q: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair…

A: Given cost of crashes are 404,441,468,231   Sort the data in ascending order. 231,404,441,468

Q: A sample consists of n = 16 scores. How many of the scores are used to calculate the range?

A:

Q: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair…

A: Given problem Given that

Q: In a city with three high schools, all the ninth graders took a Standardized Test, with these…

A: Given: X¯1=77n1=259X¯2=90n2=344X¯3=66n3=171

Q: The mean of 16 items was found to be 30. On rechecking, it was found that two items were wrongly…

A: Steps Find the sum on mean 30 Add the number which should be ,to the sum Subtract the number which…

Q: In the population, the mean SAT score is 1000. Would you be more likely (or equally likely) to get a…

A: Given that the population mean is 1,000 and the samples sizes selected are 10 and 30.

Q: The NAEP music assessment scores for eighth grade students are approximately N (150, 35). Find the…

A: Given data: Let , X ~ N (150, 35) To find: 1.Find the z-scores by standardizing the following…

Q: Mean b. Median c. Mode

A:

Q: A quiz consists of 40 multiple choice​ questions, each with five possible​ answers, only one of…

A: The number of multiple choice​ questions is, n = 40 The probability of getting correct answer is, p…

Q: A pollster wants to know the average income of those who supported John McCain for president. He…

A: Here the sample data is collected and the mean is calculated from it. Hence we have calculated the…

Q: A researcher wishes to see if there is a difference in the number of stories in the tall buildings…

A:

Q: Given a scenario where n=100 and p=0.8, find the mean.

A: In this case the sample size is n = 100 and p = 0.8.

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.