You work for a company that produces electh "shift register." This product is designed to automatically shut down if its operating temperature exceeds 175 degrees Celsius. The manufacturing process has been designed to have a standard deviation of o = 0.4 degrees Celsius. You test a random sample 19 shift registers, and you record the following shut- down temperatures. Construct a 90% confidence interval for the overall mean shutdown-temperature. 175 174.66 175.44 174.34 174.91 174.79 174.82 175.52 174.99 174.99 175.23 175.15 175.11 175 175.43 174.85 174.74 174.9 175.48 (Checksum: 3325.35) a) Find the critical value and o . Critical Value: b) Find the confidence interval:

Q: A metropolitan transportation authority has set a bus mechanical reliability goal of 3,900 bus…

A:

Q: Nationally, patients who go to the emergency room wait an average of 6 hours to be admitted into the…

A:

Q: Does the average Presbyterian donate (μ1) less than the average Catholic (μ2) in church on Sundays?…

A:

Q: A large pizzeria makes 1000 pies per day. The mean diameter of u=10.1 inches and the standard…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Fowle Marketing Research bases charges to a client on the assumption that telephone surveys can be…

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

Q: A consumer advocacy group suspects that a local supermarket's 7-ounce packages of cheddar cheese…

A:

Q: An experiment is conducted to determine whether intensive tutoring (covering a great deal of…

A:

Q: 1. Past data suggests that the average wait time at the drive-through at a certain fast food…

A: Given that, Past data suggests that the average wait time at the drive-through at a certain fast…

Q: The manufacturer of a new compact car claims that the car will average at least 35 miles per gallon…

A: Hi! Thank you for the question As per the honor code, We’ll answer the first question since the…

Q: Is a weight loss program based on exercise more effective than a program based on diet? The 57…

A:

Q: The Mayo Clinic recommends that adults sleep 8 hours per night. 79 randomly selected college…

A: Empirical Rule: 68% of values lies between one standard deviation from the mean, μ±σ 95% of values…

Q: Use the following scenario to answer the next 6 questions. An engineer has designed a valve that…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 4.8 Sample standard deviation…

Q: a)Test at the 1% significance level, do the data provide sufficient evidence to conclude that the…

A: (a) The sample size is 20, sample mean is 4.76, sample standard deviation is 2.30, and population…

Q: According to a Health of Boston report, female residents in Boston have a higher average life…

A: Given: The population standard deviations of life expectancy are 8.2 and 8.6 for females and males…

Q: A cereal manufacturer wants to test the performance of one of its filling machines. The machine is…

A: Here is given that, mean is 337.9 and standard deviation is 14.2 and number of sample is 100.

Q: Use the data file A2Q3.xlsx to answer this question. A sample containing years to maturity and yield…

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

Q: A random sample of 81 credit sales in a department store showed an average sale of $75.00. From past…

A: Solution: Let X be the amount of sale. From the given information, n=81, x-bar=$75 and σ=$27.

Q: manufacturer states that its product contains on average less than 5 parts per million (ppm) of…

A: As the population standard deviation is not known, we will use t distribution. As Vape manufacturer…

Q: Independent random samples taken on two university campuses revealed the following information…

A: From the given information, due to lack of knowledge about the population standard deviation, and to…

Q: Researchers at Carleton University in Canada studied a random sample of 10 first-year students who…

A: Given Data : For Sample 1 x̄1 = 2.46 n1= 10 s1= 3.26 For Sample 2…

Q: A sports shop records the sales of items made in China and those made in America. Country of…

A:

Q: A.  A beverage bottling company labels a product as having a mean volume of 16 oz.  It is important…

A: A. The beverage bottling company labels a product as having a mean volume of 16 oz.

Q: There is some evidence indicating that people with visible tattoos are viewed more negatively than…

A: Given : Hypothesized Mean, μ0 = 4.9 Population standard deviation, σ = 0.84 Sample mean , x = 4.2…

Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 75 female servers…

A: We have given that  Sample sizes n1=75     , n2=75      Sample means X̄1=35      , X̄2=36…

Q: A researcher is interested in the decrease in adolescent BMI after a new after school program is…

A:

Q: A random sample of 10 cigarettes of a certain brand has an average nicotine content of 7.4…

A: Formula : Test statistic

Q: An experiment is conducted to determine whether intensive tutoring (covering a great deal of…

A: State the hypotheses. That is, there is no evidence that the intensive tutoring is more effective…

Q: Community college instructors' salaries in one state are very low, so low that educators in that…

A: Given : Let X : Community college instructors salaries in one state  Sample size  of colleges (n) =…

Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 50 female servers…

A:

Q: In 2015, the average duration of long-distance telephone calls from a certain town was 3.9 minutes.…

A: Sample  - a sample is a set of measurements taken from a larger population.  Sample mean - The…

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: An electrical firm manufactures light bulbs for LCD projectors. A randomly selected sample of 24…

A: We have given that,  Sample mean (x̄) = 600 hours, standard deviation (s) = 50 hours , sample size…

Q: o male and female servers at Swank Bar work the same number of hours? A sample of 45 female servers…

A: From the given information we find the solution.

Q: A quality control expert at a pretzel factory took a random sample of 10 bags from a production run…

A:

Q: A bottling company produces bottles that hold 10 ounces of liquid. Periodically, the company gets…

A: Given that,  mu =10 X bar = 9.7 Standard deviation, sigma= 0.7 sample size, n= 36 Z= (x bar…

Q: Community college instructors' salaries in one state are very low, so low that educators in that…

A: GivenMean(x)=52534standard deviation(s)=15791sample size(n)=37α=0.05

Q: - A large on-demand video streaming company is designing a large-scale survey to determine the mean…

A: Given information- Population standard deviation, σ = 3 hours Confidence interval = 0.95…

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 medical investigation claims that the average number of Infections per week at a hospital in…

A: Given:  Test: μ≠16.3 with t distribution  Hypothesis test: H0: μ = 16.3Ha: μ ≠ 16.3 This is two…

Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 65 female servers…

A: Given that  And  Which of the following does your data suggest?   Male servers work more hours…

Q: Use the following scenario to answer the next 6 questions. An engineer has designed a valve that…

A: Given: Sample size (n) = 30 Sample mean (x̅) = 4.8 Sample standard deviation (s) = 1 Level of…

Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 65 female servers…

A: Given, Sample size of females n1 = 65Sample mean of females x1¯ = 37Standard deviation of females s1…

Q: he following stemplot shows the swimming speeds, in kilometers per hour  (km/h), for a random sample…

A: xbar = 9.771 s = 0.944 n = 31

Q: According to Dietary Goals for the US (1977), high sodium intake may be related to ulcers, stomach…

A: We have given that, Mean(x̄) = 238, standard deviation (s) = 8.3, sample size (n) = 9 and confidence…

Q: According to Management Accounting, salary figures for certified management accountants (CMAs) who…

A: The given information is that the random sample of 15 first year CMAs in Denver produces a mean…

Q: As a manager of a certain restaurant, you want to conduct a study on the average waiting time before…

A: According to the given information, we have Margin of error = 2 Population standard deviation = 15

Q: A schoolteacher is worried that the concentration of dangerous, cancer-causing radon gas in her…

A:

Q: than a football filled with air. To test this, the writer used 18 adult male volunteers. These…

A: We want to find 90% confidence interval for difference of mean

Q: An experiment is conducted to determine whether intensive tutoring (covering a great deal of…

A:

Q: worked an average of 30 hours per week, with a standard deviation of 2. A sample of 65 male servers…

A: A range of values can be suggested with a certain amounts of confidence such estimates are called…