The average number of pups in sixteen wolf dens of the southwestern U.S. is 5.63 with a standard deviation of 1.78 pups. Compute an 85% confidence interval for the  population mean number of wolf pups per den.

Q: While performing a strenuous task, the pulse rate of 25 workers increased on the average by 18.4…

A: Given that  Sample size n =25 Sample standard deviation s=4.9 Sample mean =18.4

Q: In order to estimate the mean amount of damage sustained by vehicles when a cow is struck, an…

A:

Q: A random sample of 100 teachers in a large metropolitan area revealed a mean weekly salary of $487…

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

Q: A researcher has collected the blood samples of 29 individuals and found that the mean hemoglobin…

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

Q: In a random sample of 40 visitors to a certain theme park, it was determined that the mean amount of…

A:

Q: The phenol concentration of wastewater was detemined from three (3) parallel determinations, giving…

A: Null hypothesis:   H0: µ=0.520   That is, the mean reference value is not statistically significant.…

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

A: Solution: Let X be the weight of fish. From the given information, x-bar=157 grams, S=8.3 grams and…

Q: In a random sample of 60 computers, the mean repair cost was $150 with a standard deviation of $36.…

A: Solution is given below.

Q: From the normally distributed systolic blood pressures of a given patient population with a standard…

A: Sample mean = x̅ = 120 Sample size = n = 9 Population S.D = σ = 24 Standard Error = σ/√n  =…

Q: In a random sample of 60 dog owners enrolled in obedience training, it was determined that the mean…

A:

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

A:

Q: 2. The heights of a random sample of 50 Senior High School students showed a mean of 174.5…

A: Given that x̄ =174.5 , S=6.9 , n = 50

Q: From a random sample of 68 businesses, it is found that the mean time that employees spend on…

A: Given dataSample size(n) = 68Sample mean = 4.9 standard deviation = 0.35Significance level(α) =…

Q: The weight of a certain machined part has a standard deviation of 4 grams. How many parts from the…

A: Given information- Standard deviation, σ = 4 grams Confidence level = 0.95 n = sample size Margin…

Q: in a preliminary sample of men from a certain geographical region, the standard deviation of their…

A: Determine the sample size The sample size is obtained below as follows: The formula of sample size…

Q: A sample of 15 car owners showed that their average repair bill was $300 with a standard deviation…

A: It is given that sample mean is $300 and standard deviation is $32.

Q: A researcher is interested in estimating the mean length of walleye in a lake with a 95% confidence…

A:

Q: A random sample of 800 credit-card holders shows that the mean annual credit-card debt for…

A: Given information:  A random sample of n = 800 credit card holders was taken. The sample mean annual…

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

A: Given information Sample size(n) = 25 Sample mean = 157g Population standard deviation (σ) = 9.4 g…

Q: A reacher has collected the blood samples of 29 individuals and found that the mean hemoglobin…

A: Given:

Q: In a recent study of 42 eighth graders, the mean number of hours per week that they watched…

A: Mean = 19.6 Standard deviation = 5.8 Sample size n = 42

Q: The number of motorcycles sold annually by salespeople is normally distributed with a standard…

A: From the provided information, Population standard deviation (σ) = 15 Sample size (n) = 300 Sample…

Q: 900 students were surveyed and had an average GPA of 2.7 with a standard deviation of 0.4. Calculate…

A: Given data,n=900Mean μ=2.7sd σ=0.4Z-value at 95% confidence is Zc=1.96 Calculate the margin of…

Q: A random sample of 50 children 13 to 15 years old was obtained, and their daily consumption of iron…

A:

Q: Calculate a 90% confidence interval for the mean of the population, supposed normal, from which…

A: Given, Heights 63 63 66 67 68 69 70 70 71 71 Let X be height of  animal…

Q: A company that produces white bread is concerned about the amount of sodium in its bread. The…

A:

Q: The monthly advertising expenditure of the company is normally distributed with a standard deviation…

A:

Q: In a sample of 32 students, the mean scholarship amount received was $887, with a standard deviation…

A: Given information: n=32x¯=887s=27.4 df=n-1=32-1=31 Confidence level is 90% Significance level is…

Q: In a study of auto collision insurance costs, a ma of 80 auto body repair costs per damage has a…

A: Given Data: Margin of error=10 n=80 x¯=472.36s=62.35

Q: In a sample of 56 tax returns filed by local hotel managers in a recent year, the taxable incomes…

A: Given: n=56 Mean= 41225 Standard deviation = 6112

Q: A group of students sampled water from 34 lakes in St. Joseph County. If the mean dissolvedoxygen…

A: Given Information Number of goats = 34 Mean = 3.2 Standard deviation = 0.57 90% confidence interval…

Q: In a survey sample of 83 respondents, the mean number of hours worked per week is 39.04, with a…

A: Solution : The complete solution is given below in the attachment file.

Q: A random sample of 550 credit-card holders shows that the mean annual credit-card debt for…

A: Given information   Sample size (n) = 550 Mean x̅  = $8220 Standard deviation (s) = $1102…

Q: Based on this, what is the margin of error associated with a 95% confidence interval for the true…

A: Given : n=36 , X-bar=35  , σ=2.3  , α=0.05 Since , the population standard deviation (σ) is known.…

Q: A group of 40 bowlers showed that their average score was 192 with a standard deviation of 8. Find…

A: Given: n = 40 x¯ = 192 σ = 8 confidence level = 95%

Q: A random sample of 50 roundtrip flights between New York and Chicago has an average airfare of $400…

A: Given : A random sample of 50 round-trip flights between New York and Chicago has an average airfare…

Q: In a random sample of seven cell​ phones, the mean full retail price was ​$402.50 and the standard…

A:

Q: On the Stanford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with a…

A: Given  population mean μ=100, n=sample size=21, sample mean x̄=92, sample standard deviations s=6.92…

Q: In a random sample of 40 visitors to a certain theme park, it was determined that the mean amount of…

A:

Q: In a survey of 86 publicly-traded companies, the average price-earnings ration was 15 with a…

A: Given data n=86 x=15 SD=9

Q: The average hemoglobin reading for a sample of 20 LHS teachers was 16 g/100 ml, with a sample…

A: We need to find the 95% confidence interval for the given sample data.

Q: Suppose glucose content are measured from 20 pineapple cans, randomly selected from a local canning…

A: Note- Since you have posted multiple questions, as per our guidelines we are supposed to answer only…

Q: The monthly advertising expenditure of the company is normally distributed with a standard deviation…

A:

Q: A beverage machine is adjusted to release a certain amount of syrup into a chamber where it is mixed…

A: Given : Sample size (n) = 25 Sample mean (X¯) = 1.10 Sample SD (S) = 0.015 Confidence level = 95% So…

Q: In a sample of 10 randomly selected black bears from northeast Pennsylvania, the sample mean was…

A:

Q: A study was conducted to estimate hospital costs for car accident victims who wore seat belts.…

A: Using t distribution for calculating confidence interval becauseof unknown population sd.

Q: In a sample of 45 students, the mean scholarship amount received was $854, with a standard deviation…

A:

Q: In a random sample of 20 boxes of cereal, the mean sodium content is 173.1 mg with a standard…

A: Solution:From the given information, number of boxes (n) is 20, sample mean (x̄) is 173.1 mg, sample…

Q: A sample of 30 Microsoft employees yielded a mean of 44 hours worked per week with a standard…

A: A sample of 30 Microsoft employees are collected. Sample mean number of hours worked per week is 44…