The data below are the ages of a random sample of 8 men in a bar. It is known that the population of ages are normally distributed with a standard deviation of 12. Determine the 93% confidence interval estimate of the population mean.   55,67,24,34,60,36,26,4655,67,24,34,60,36,26,46

Q: A sample of 16 students was taken from LIU university. These students spent an average of $170 on…

A: Givensample size(n)=16Mean(x)=170standard deviation(s)=25.50confidence interval = 98%

Q: For a population, the value of the standard deviation IS, 2.55. A random sample or 35 observations…

A: (a) Since sample mean is an unbiased estimate of the population mean we have: E(x )=μ 42 51…

Q: Americans spend nearly $7 billion on Halloween costumes and decorations. Sample data showing the…

A: The data shows the amount in dollars of 16 adults spent on a Halloween costume.

Q: For a population, the value of the standard deviation is 2.61.Arandom sample of 35 observations…

A: We have given that  Sample size n= 35  Standard deviation = 2.61

Q: To estimate H, the mean salary of full professors at American colleges and universities, you obtain…

A:

Q: Suppose the population standard deviation, o, of the drying time is unknown. The following…

A: The random variable drying times follows normal distribution. We have to construct 95% CI for the…

Q: The average salary of 36 employee was 4650 and the sample standard deviation was 165. Find the 99%…

A: We associate with the interval estimate is called a confidence interval. This probability indicates…

Q: ne manager of the local health club is interested in determining the number of times members use the…

A: Given data,n=15x=11.2s=3.2α=0.05df=n-1=14t-critical value at df=14 and α=0.05 is tc=2.145

Q: You randomly select 36 cars of the same model that were sold at a car dealership and determine the…

A: Formula :

Q: The amount of material used in making a custom sail for a sailboat is normally distributed with a…

A: Given,Standard deviation σ = 64Sample size n = 15Sample mean x¯ = 912

Q: The head librarian at the Library of Congress has asked her assistant for an interval estimate of…

A: We have given that  95% C.I = ( 740 , 920 ) Standard deviation =150

Q: If a sample of 25 fish from my pond has mean weight 157 grams with a standard deviation of 8.3 grams…

A: Given: σ = 8.3 grams  n = 25

Q: A sample of the length in inches for newborns is given below. Assume that lengths are normally…

A:

Q: Construct the indicated confidence interval for the difference between the two population means.…

A: We have given the amount of time spent watching television by women and by men- For sample 1 for…

Q: The following data represent the pH of rain for a random sample of 12 rain dates. A normal…

A: Given,   Sample size = 12   Since the population standard deviation is not known, use t-distribution…

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A:

Q: A random sample of 150 students has a grade point average with a mean of 2.86 and with a standard…

A: It is given that the sample size is 150, the mean is 2.86 and the standard deviation is 0.78.

Q: Construct the indicated confidence interval for the difference between the two population means.…

A: Solution  We find confidence interval by excel

Q: The data below represent a random sample of the number of home fires started by candles for the past…

A: Given the data is: 5460, 5900, 6090, 6310, 7160, 8440, 9930 The sample size is n = 7n=7. The…

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A: We have to find sample size....

Q: The mean blood sodium concentration of these 38 cases was 115 mmol/l, with standard deviation of 12…

A: Note:  Hey, since multiple questions are posted, we will answer first question for you. If you want…

Q: The average salary of 64 employee was 5400 and the sample standard deviation was 280. Find the 95%…

A: It's a t distribution as the population standard deviation is unknown

Q: An agriculture publication daims that the population mean of the birth weights for all Alpine goats…

A:

Q: The average salary of 64 employee was 5400. Using historical data, we will assume that the…

A: Given; Number of employee = 64 Average salary=5400 Standard deviation = 280.

Q: Peter collects data on the music scores of 200 randomly selected concertos. The sample mean of this…

A: It is given that the mean is 85,252 and the standard deviation is 8,413.

Q: The following data are the marks for a sample of 5 students in Mathematics Exam. 18, 10, 20, 22, 28…

A: Given data, the marks for a sample of 5 students…

Q: n the 2018 General Social Survey, a random sample of 1666 adults in the U.S. was asked how old they…

A: Confidence interval give a range of values for the unknown parameter of the population. The width of…

Q: A mobile phone manufacturer wishes to estimate how frequently their customers buy a new phone. They…

A: Solution: Let X be the random variable. From the given information, x-bar=1.9 years, S=1.2 and n=22.

Q: For a population, the value of the standard deviation is 2.51. Arandom sample of 35 observations…

A:

Q: The amount of material used in making a custom sail for a sailboat is normally distributed with a…

A: Confidence interval is a range of values it contains the true population parameter with specified…

Q: A simple random sample of 41 Veterans Day celebrations was selected and the number of children…

A: (14) Obtain the 98% confidence interval for the mean number of children attending all 2017 Veterans…

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A: Margin of Error: margin of error of a point estimate provides the extent of accuracy with which the…

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A: It is given that confidence level is 0.96, population standard deviation is 300 and margin of error…

Q: A study of 25 professors showed that the average time they spent creating test questions was 16.5…

A: It is given that the sample size is 25 professors, the average time to creating test question is…

Q: 1. The strength of a fiber is normally distributed with a known population standard deviation of 12…

A: Here since the population standard deviation is given we use the Z value for the computation of…

Q: SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An…

A:

Q: The amount of material used in making a custom sail for a sailboat is normally distributed with a…

A: Given σ=64, n=15  and  x¯=912

Q: A random sample of 12 students showed the following time (in hours) of sleep 4.5 5 5.5 6 6 7 7.5 7.5…

A:

Q: Which of the following is the 99% confidence interval estimation for the mean monthly rental fee for…

A:

Q: The average salary of 64 employee was 5400. Using historical data, we will assume that the…

A: The sample size is 64, sample mean is 5400, and population standard deviation is 260.

Q: Based on a random sample of hospitals reports from eastern states that provide charity care. The…

A: Sample mean and standard deviation: Enter the values of in columns A of an excel.  The sample mean…

Q: b) The following are the diastolic blood pressure readings (mm Hg) taken from five men and five…

A: We assuming that the data constitute independent random samples from normal populations with equal…

Q: The dollar value of orders placed through a particular store catalog is found to be normally…

A: Given data,σ=21.58n=30x=81.25z-value at 90% CI is Zc=1.645

Q: Compute a 95% confidence interval for the true population mean given the following  10 data that…

A: Given, Sample size = 10 Sample mean = 15.3 Sample standard deviation = 3.5   Since the population…

Q: Assuming that the population is normally distributed, construct a 90% confidence interval for the…

A: Solution-: We find 90% confidence interval for the data 1,2,3,4,5,6,7,25 Also, we find confidence…

Q: The manager of a pizza shop finds that the delivery time of pizza to customer follows a normal…

A:

Q: Suppose that a firm does a study to determine the time needed to complete one person' tax forms. It…

A: Givenn=611Mean(x)=23.6standard deviation(s)=7α=1-0.95=0.05α2=0.025tα2,df=1.964

Q: The following data are the marks for a sample of 5 students in Mathematics Exam. 19, 11, 21, 23, 18…

A:

Q: A researcher has collected the blood samples of 35 individuals and found that the mean hemoglobin…

A: