A university surveyed recent graduates of the English department for their starting salaries. One hundred and ninety six graduates returned the survey. The average salary was $25,200. The population standard deviation was $1,250. What is the 95% confidence interval for the mean salary of all graduates from the English department?

Q: Blood sugars from eight patients in a rural clinic were recorded last summer by the local physician.…

A: Given blood sugar results are120,145,200,250,79,100,894,255sample size(n)=8

Q: A college conducts a common test for all the students. For the Math portion of this test, the scores…

A:

Q: Joan's finishing time for the Bolder Boulder 10K race was 1.78 standard deviations faster than the…

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A: The hypotheses of the test are given as follows: Null hypothesis: µ=2.4. Alternative hypothesis:…

Q: A report said that the average blood pressure is  130.71  for a sample of  37  white males aged  35…

A:

Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated.

A: Population standard deviation, σ =3 inches Sample size n=6

Q: Students in two basic Spanish classes were required to learn 50 new vocabulary words. One group of…

A: Given, Students in two basic Spanish classes were required to learn 50 new vocabulary words. One…

Q: A newspaper article reports that the mean cost for preventative dental care per year is $175 with a…

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Q: Five cars of the same year and model were tested for gas mileage in highway driving and the results…

A: The data are X: 30,39,33,31,27

Q: 500 freshmen at Arundel University took part in a math comprehension test. The scores were normally…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 7 Let X be a random variable…

Q: mean length of 25 cm. Because of the variability in the manufacturing​ process, the lengths of the…

A: Population mean μ =25 Population standard deviation =0.08

Q: Can the standard deviation of a data set be zero

A: Standard deviation can not be negative.

Q: The SAT Math scores have a bell-shaped distribution with a Mean of 567 and a Standard Deviation of…

A: We have given that,  Let the SAT scores are normally distributed with mean (mu) = 567 and standard…

Q: If a school district takes a random sample of 50 Math SAT scores and finds that the average is 47,…

A:

Q: Corey has 4929 songs in his computer's music library. The songs have a mean duration of 248.3…

A:

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: A sample of data is given as below:3, 5, 7. What is the standard deviation

A: The formula for sample standard deviation is,

Q: Suppose the average credit card debt for Americans is $7000 and is not normally distributed with a…

A: Given information:  Population mean (u) = $ 7000  Sample size (n) = 40 Sample mean (x) = $ 6500…

Q: The heights of 82 roller coasters have a mean of 280.7 feet and a population standard deviation of…

A: Given data normally distributed with mean of 280.7 feet, population standard deviation 59.3 feet and…

Q: A college alumni Organization sent a survey to all recent graduates to ask their annual income. 20%…

A: Given, All recent graduates of a college were asked their annual income for a survey that was…

Q: What is the formula for the mean absolute deviation formula for paired data sets?

A:

Q: A researcher in Des Moines, Iowa sampled 56 households and found the mean number of puppies per…

A: # sample size n=56  population mean mu=3.03  standard deviations=1.5  then to find 62nd percentile…

Q: A survey of 64 randomly selected homeowners find that they spend a mean of $62 per month on home…

A: