The accompanying frequency distribution summarizes sample data consisting of ages of randomly selected inmates in federal prisons. Use the data to construct a 99% confidence interval estimate of the mean age of all inmates in federal prisons. Age (years) 16-25 26-35 36-45 46-55 56-65 Over 65 Using the class limits of 66-75 for the "over 65" group, find the confidence interval. << (Round to one decimal place as needed.) Number 14 60 66 37 15 4

Q: A corporation that maintains a large fleet of company cars for the use of its sales staff is…

A: Sample size (n) =10 Here sample data is given hence we use T Test to find confidence interval…

Q: erence between Hc Di HB > Hci HB > HO ifference between

A:

Q: 10,9,20,13,1210,9,20,13,12 Using these data, construct a 99%99% confidence interval for the average…

A: Solution: a. Let X be the net change in a student’s score after completing the course. The given…

Q: 37% from a sample of 3800 people are saving for retirement. Construct the confidence interval for…

A: Given that.  Sample size n =3800 Sample proportion p^=37%=0.37

Q: ​Clearly one would assume that private colleges and universities would have a higher annual total…

A: Given information: The data represents the values of annual total cost of private school and public…

Q: During the nutrition research, the amount of consumed kilocalories per day was measured for 18…

A:

Q: Use the confidence interval to find the margin area (.596,.740)   margin of error?  samplemean?

A: Given confidence interval is (.596,.740) margin of error=? sample mean=?

Q: 3. Confidence level : 99%, degree of freedom = 0, & = 0, s = 1 4. Confidence level : 99%, degree of…

A: Q4 Given that  99% confidence level  x=10 s=0.1 degrees of freedom=4 Q5 Given that  99% confidence…

Q: Manufacturing times for a particular part are normally distributed. Based on a sample data 20, 18,…

A:

Q: A survey about monthly cell phone service costs was given to 49 randomly selected Americans aged…

A: Given data of a survey about monthly cell phone service costs of 40 selected Americans aged 25-64.…

Q: question is pictured

A: From the provided information,

Q: Estimate the proportion of all students at this university who are First Year students. Use a 95%…

A: A parameter of interest is a statistical value of the population which is being tested based on the…

Q: (b) Assume that the mean score for students taking traditional courses is 5.60. A college that…

A: The mean score for students taking traditional curses is 5.60.

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A:

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: Given, Confidence limit is (5.0,8.1)

Q: The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. An…

A: The 80% confidence interval that results from examining 634 customers in Taco Bell's drive-through…

Q: for 98% e value of z* for a confidence level of 93%. Show your work on your own piece of paper. ake…

A: We have to find critical value for z.

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: The given data set is, 7,7,3,10,7,5,8,9,7,9,3,9 Here, we have to construct and interpret a 99%…

Q: Consider the following hypothesis test: Họ : a- 80 H: a 80 A sample of 85 is used. Identify the…

A:

Q: 95% confidence, the margin of errors is 2.5 then, the confidence interval for population mean is

A: The sample mean is given as 5.0 with a 95% confidence. The margin of error is 2.5. To determine the…

Q: I want to estimate the population mean number of times the average pet owner gives their pet(s)…

A: Obtain the 95% confidence interval for the population mean. The 95% confidence interval for the…

Q: Find a 95% confidence interval for the difference between full attendance students' Exam 5 score and…

A: We have given data,  Less attendance Full attendance 90 96 90 96 60 100 50 99 69   88…

Q: n describing confidence intervals on a mean, z and t intervals are frequently mentioned. How are z…

A: The t distribution is similar to the standard normal distribution but takes a slightly different…

Q: In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​…

A: This question requires accurate results, Hence I will rise Excel to solve this question.…

Q: Constructing a Confidence Interval for a Population Proportion In a survey funded by a large…

A:

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: The question is about confidence intervalGiven :To find :1 ) 90 % CI for the popl. mean2 ) What does…

Q: Road Safety statistics of a certain town over the last three years, the ten intersections having…

A: *Answer:

Q: Which of the following will have the smallest margin of error? Note that n denotes the sample size.…

A: Margin of error is given by, MoE= Z*sigma/√n Where sigma is standard deviation and n is sample size.…

Q: Consider a drug that is used to help prevent blood clots in certain patients. In clinical trials,…

A: Note: As per our guidelines, we can answer only first question. Kindly re-post the other questions…

Q: ted below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The…

A: The given data is  4 2.9 4 4.8 3 4.2 3.8 4.4 4.2 4 4.3 3.9 3.5 4.1…

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: Obtain the 99% confidence interval for the population mean. The 99% confidence interval for the…

Q: The table provides summary statistics on highway fuel economy of cars manufactured in 2012 (from…

A: Given data:Hwy MPG, Automatic (consider sample-1)Hwy MPG, Manual (consider sample-2)Mean;…

Q: 11,6,9,10,711,6,9,10,7 Using these data, construct a 99%99% confidence interval for the average net…

A: From given data, Mean x̄=8.6 standard deviation s=1.96 n=10 C=99%   t-critical value at α=0.01 and…

Q: Explain how to find the 95% confidence interval for the mean by hand using the following data set…

A: For the given sample, x¯=59.05, from the excel function, =AVERAGE(J2:J21)s=4.6394, from the excel…

Q: credit score is used by credit agencies to assess the creditworthiness of individuals. Values range…

A: Sample size n =24 Sample mean=735.6 Standard deviation =74.5 NOTE:- According to bartleby guidelines…

Q: Twenty car salespeople were sampled to see how many cars they sold in a month; the following data…

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

Q: A sleeping bag that should keep you warm in temperatures from 20degrees to 45degrees. What is the…

A:

Q: How tp use a sample mean to calculate a confidence interval?

A: The equation for confidence interval can be stated as:

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female…

A: Find the distribution that has to be used to construct the confidence interval in the given…

Q: uestion. Using 't-table.pdf file, construct confidence intervals 1. Confidence level : 90%, degree…

A: As per guideline expert have to answer first question only dear student please upload other question…

Q: Here are some ratings on a scale of 1-10. Use confidence interval of 99% confidence. What is the…

A: Given data, 8, 7, 3, 10, 4, 4, 8, 8, 7, 8, 3, 8 n=12 Sample mean and sd is x=6.5 s=2.35

Q: For the first six months of the year, an analyst records the monthly closing stock price (in $) for…

A: 1) Mean is given as, Mean=655+58+...+62​=56.83 Std deviation is given as, s=n−1∑(Xi​−Xˉ)2​​=4.07 2)…