Suppose that BC financial aid alots a textbook stipend by claiming that the average textbook at BC bookstore costs $$ 88.09. You want to test this claim. Based on a sample of 100 textbooks at the store, you find an average of 85.09 and a standard deviation of 19.8. The point estimate is:  (to 3 decimals) The 99 % confidence interval (use z*) is:  to  (to 3 decimals)

Q: Suppose that you are interested in determining the average height of a person in a large city. You…

A: Solution: Given information: n= 400 Sample size  x=63 inches Sample mean s= 6 inches Sample standard…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 270.6…

A: Given data,μ=270.6σ=16.9P(-z<Z<z)=0.50

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days…

A: Here, µ=261 and σ = 17.

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 268.5…

A: It is given that the length of pregnancies is normally distributed with mean 268.5 and standard…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 261.5…

A: Given data, Mean=261.5 sd=17.6 In what range would you expect to find the middle 68% of most…

Q: Jill only receives surveys from 386 people despite expecting to receive 500 surveys. How will this…

A: Since we know that margin of error is defined for Unknown population standard deviation is and the…

Q: An important factor in selling a residential property is the number of people who look through the…

A: Since the sample size is small and population standard deviation is unknown, t distribution can be…

Q: A course has 350 students, and will be graded on a curve. In this curve 18% of students receive an…

A: The point total required to get an A is, Thus, the point total required to get an A is 32.5.

Q: The manager of "Frenchies" is concerned that the patrons are not consistently receiving the same…

A: Solution: From the given information, the sample variance is S=1.7, population standard deviation is…

Q: 15. A random sample of 100 visitors to a popular theme park spent an average of $142 on the trip…

A: SOLUTION: Given average x=142          standard deviation σ=47.5          random sample n=100

Q: Suppose that the lengths of human pregnancies are normally distributed with a mean of 266 days and a…

A: given data normal distributionμ = 266σ = 17   empirical rule : approximately 68-95-99.7% data fall…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 264 days…

A: Let X denote the length of pregnancies in a small rural village. According to the given information.…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 263 days…

A:

Q: indom sample of elght cell phones in of error and construct a 90% confidence interval for the…

A: We have given that  Sample size n= 8  Sample mean = 552  Standard deviation = 222 Note:-According to…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 267.3…

A: The given question requires accurate results, Hence I will use Excel to solve this question.…

Q: and not 7. The measurements of the drying time, in hours, of a certain brand of latex paint follow a…

A: Confidence interval are used to measure the range where the parameter lies. It can be calculated for…

Q: Jose's ACT score had a z-score of 1.15. What was his ACT score? Standardized tests: In a particular…

A:

Q: Suppose that BC financial aid alots a textbook stipend by claiming that the average textbook at BC…

A: From the provided information, Sample size (n) = 60 Sample mean (x̅) = 73.09 Sample standard…

Q: Suppose IQ scores of students at Bradley follow a normal distribution with a mean of 103 and a…

A: Calculate the IQ score for the top 2.5% of all IQ's at this college.

Q: Suppose the graduation rate from the last 5 years at wayne state university hasw standard deviaton…

A: Standard deviation:Standard deviation helps to identify the spread of data for a group from the…

Q: The manager of "Frenchies" is concerned that the patrons are not consistently receiving the same…

A:

Q: Suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 50 and…

A: Given mean is 50 and the standard deviation is 5. There are 35 students

Q: I also need the standard deviation for the above question.

A:

Q: . A sample of 84 WCC students found mean age 24.7 years old with standard deviation 7.9 years old.…

A:

Q: You measure 28 turtle's weights, and find, they have a mean weight of 51 ounces. Assume the…

A:

Q: April took a sample of 10 statistics students from MCC and found the mean of th scores on their…

A: a.) Construct a 90% confidence interval for MCC statistics students mean score on the second exam.…

Q: Find a 90% confidence interval for the population mean age of the Smurfs if a sample of 52 smurfs…

A: It is given that, There is a random sample of size 52 and has a mean of 49.7 and the standard…

Q: when the population standard deviation is 12 points.   b. when the population standard deviation is…

A: It is given that  Sample mean = 68 Sample size = 36 Confidence level = 95%   Note: According to…

Q: wish to construct a 99% confidence interval

A: Given that  Sample size (n) =14 Mean money spent (x¯ )= $145 = Sample mean  Sample standard…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days…

A: Given Information Mean µ = 260 Standard deviation(σ) = 14

Q: In 1977, men who were under 50 years old had a mean weight of 175 pounds, with a standard deviation…

A: Given: mean(μ)=175standard deviation(σ)=18

Q: Question 2 – hypothesis test with guidance A Fle of 14 account balances of a credit company showed a…

A: Solution: Given information  n= 14 Sample size x=$4550 Sample mean s=$500 Sample standard deviations…

Q: Suppose that for the past several decades, daily precipitation in Seattle, Washington has had a mean…

A: Power of the test is the probability of rejecting null hypothesis when the null hypothesis is false.…

Q: 6. In year 2022 a random sample of 35 households in Ottawa found that the average annual internet…

A: The random variable annual internet service cost per household follows normal distribution. We have…