A state transportation official claims that the mean waiting time at exit booths from a toll road near the capitol is no more than 0.40 minutes. For a sample of 35 motorists exiting the toll road, it was found that the mean waiting time was 0.46 minutes, with a standard deviation of 0.16 minutes. At the 0.05 level of significance, what is the value of the test statistic

Q: two classes, one with 18 students and one with 21 students, took an assesment and obtained an…

A: The overall mean is, x̄ = 55.0.The number of students in class 1 is, n1= 18.The mean score of the…

Q: What is the minimum percentage of data values that will come within 2.5 standard deviations from the…

A: To find the minimum percentage

Q: Please also explain why you determined whether or not the results are statistically significant.…

A: Given information isn1=40n2=40s1=0.50

Q: A machine used to fill gallon-sized paint cans is regulated so that the amount of paint dispensed…

A:

Q: The National Center for Health Statistics reports that the average systolic blood pressure for males…

A: Here, The claim to be tested is "The medical director of a large company believes the average…

Q: A teacher found that the mean number of hours her 12 students spent studying for an AP Statistics…

A: old mean for 12 students = 6.7 sum of 12 students = 6.7*12 = 80.4

Q: Russell is doing some research before buying his first house. He is looking at two different areas…

A:

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: The admission committee of AUCA passes 61% of those who took the exam. If the scores follow a normal…

A: We have given that.   X~N( μ , ?^2 )   μ =350 , ? =25   Z-score =( x - μ )/?

Q: Disney has studied its movie customers to determine how much money they spend on their movies. The…

A:

Q: Second Hand Smoke: Cotinine levels were measured in a group of 40 non-smokers exposed to tobacco…

A:

Q: b. The test statistic 0° c. The p-value = d. The p-value is ≤ ✓ O α (please show your answer to 3…

A: The given information is:Sample 1:The sample size is The sample mean is The sample standard…

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Given Let X : The average hours of sleep on a weeknight mean = μ= 6.9  standard deviation = σ= 1.5…

Q: Students at a major university are complaining of a serious housing crunch. They complain that many…

A: From the provided information, Mean (µ) = 16.1 Standard deviation (σ) = 4.0 X~N (16.1, 4.0)

Q: Ted had the lowest ERA​ (earned-run average, mean number of runs yielded per nine innings​ pitched)…

A: According to the given information in this question We need to find the z score

Q: One year thomas had the lowest ERA​ (earned-run average, mean number of runs yielded per nine…

A: GivenThomas has an ERA of 2.67 and Sarah has an ERA of 2.99For males,For femalesTo find the z-score…

Q: The scores on a marketing exam were normally distributed with a mean of 67 and a standard deviation…

A: Given data normally distributed with mean (μ) =67, standard deviation (σ) =9.Let ‘X’ be a normal…

Q: According to a human modeling project, the distribution of foot lengths of 16- to 17-year-old boys…

A: given data normal distributionμ  = 25.4σ = 1.2

Q: banker finds that the number of times people use automated-teller machines (ATMs) in a year are…

A: We have given Mean(µ) = 40Standard deviations (σ) = 11.2X ~ N (µ, σ )= N(40, 11.2)

Q: You are a consumer advocate. A particular brand of tires state that they last for 50,000 miles…

A: Given that, You are a consumer advocate.  A particular brand of tires state that they last for…

Q: Do shoppers at the mall spend more money on average the day after Thanksgiving compared to the day…

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

Q: A parent claims that children spend about 2 hours a day in front of computer screens. We think that…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: You are a consumer advocate.  A particular brand of tires state that they last for 50,000 miles…

A: We have to find That which statastics test use.. from given options..

Q: The scores of a standarlized test form a normal distribution with a mean of 300 and standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: A banker finds that the number of times people use automated-teller machines (ATMs) in a year are…

A: The mean is 40 and the standard deviation is 11.

Q: After the active learning or passive learning class, students rated the extent to which they agreed…

A: We have given that  Sample size n1=142 , xbar1=3.338 and s1=0.922 And  Sample size…

Q: A medical researcher is interested in the prenatal care received by pregnant women in inner cities.…

A: We have given that  Sample size n=20 , sample mean =4  s=1 , 95%confidence.

Q: Ms. Wall administered a push-up test to her adapted PE class.  There were 6 students in the class.…

A:

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Let, X= The number of hours of sleep on a weeknight. μ=6.9, standard deviation=σ=1.5 We want to…

Q: A Statistics instructor wanted to compare the scores on the same final exam given to students at a…

A: We have given that  Sample sizes n1= 36 , n2= 45 ,xbar1=84 ,xbar2= 79 , s1= 3.4 ,s2=2.6  Confidence…

Q: In your work as a biomedical engineer, you need to better understand the distribution of adults'…

A: Given : Systolic blood pressure has a normal distribution with a mean of 112 mm Hg and standard…

Q: A study by the National Center for Health Statistics suggested that women between the ages 20 and 29…

A: 0.33271Explanation:For the given normal distribution with μ=26.8 and σ=7.4, the required proportion…

Q: According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the…

A: Given X is normal Distributed with mean µ = 65.0 and standard deviation σ = 3.0 Need to find Z score…

Q: A hospital president claims that the average Salary of registered nurses at her hospital is more…

A:

Q: The serum cholesterol levels for men in one age group are normally distributed with a mean of 178.1…

A: Given that the serum cholesterol levels for men in one age group are normally distributed with a…

Q: You randomly select 14 student cars and find they have a mean age of 7.3 years and a standard…

A: Let  n1, n2 be the sample size  Sample mean  of first and  second are respectively x̄1 amd x̄2  s1…

Q: The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is…

A: