A study was made of a sample of 25 records of patients seen at a chronic disease hospital on an outpatient basis. The mean number of outpatient visits per patient was 4.8, and the sample standard deviation was 2. Can it be concluded from these data that the population mean is greater than four visits per patient?

Q: A random sample of 100 observations from a quantitative population produced a sample mean of 28 and…

A: sample mean (x̄)  = 28  sample standard deviation (s) = 6.5 population mean (μ) = 26.8 Answer :…

Q: A scrap metal dealer claims that the mean of his sales is “no more than $80,” but an Internal…

A: Given that, Mean= 91 Standard deviation, sigma= 21 Sample size, n=20 Hypothesis,  Ho:  the agent’s…

Q: If a sample has a mean of 250 and a standard deviation of 15, what is the value in the data set that…

A:

Q: In a latest survey conducted by a 3rd party company, excessive intakes of sodium may lead to ulcers,…

A: The sample size is 20, sample mean is 244, sample standard deviation is 24.5.

Q: an oceanographer claims that the mean dive duration of a north atlantic right whale is 11.5 minutes.…

A: From the given information, Sample size n =34 the Sample mean, x̅=12.2 minutes the Sample standard…

Q: A significant number of students completed a Statistics exam, and the final marks had a mean of 70…

A: Answer - A significant number of students completed a Statistics exam, and the final marks had a…

Q: The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of…

A: Given:μ=219 and σ=36.6Sample size = n = 247We have to find how many would you expect to have a total…

Q: Construct a 95%95% confidence interval for the true difference in mean battery life between Steve’s…

A: The pooled variance is, sp2=n1-1s12+n2-1s22n1+n2-2=12-14.33+7-16.8212+7-2=28.2841 The pooled…

Q: A sample of 23 provided a sample mean of 158 and a sample standard deviation of 20. Find the value…

A: Given that Sample size n = 23 Sample mean = 158 Sample SD = 20

Q: If grades on a certain test are approximately normally distributed with a mean of 75 and a standard…

A: The random variable X is defined as the grades on a certain test follows normal distribution with a…

Q: For a population with mean 90 and standard deviation 10, what is the z-score corresponding to X =…

A:

Q: If a population has a mean of 15 and standard deviation of 3, what is expected of the sample mean…

A:

Q: The combined math and verbal scores for students taking a national standardized examination for…

A: Given  mean of 670 and a standard deviation of 220.

Q: Students at Arrowhead High School took a Math test with a mean of 120 and a standard deviation of…

A: Let X be the random variable of normal distribution with mean 120 and standard deviation 25 Let Z be…

Q: the ____ is based on only two scores in a distribution. -deviations  -variance -range -standard…

A: We know that, Deviations refers to the distance between the observations from their corresponding…

Q: A food company is concerned that its 16-ounce can of sliced pears is not being filled correctly. The…

A: State the hypotheses That is, the mean weight is equal to 16 ounces. That is, the mean weight is…

Q: The objectives of a study were to describe the menopausal status, menopausal symptoms, energy…

A: Given Information : The objectives of a study were to describe the menopausal status, menopausal…

Q: In a recent study of 35 Grade5 students, the mean number of hours per week that they played video…

A: We know that,  Sample size (n) = 35, sample mean (x̄) = 16.6 and population standard deviation (σ) =…

Q: If the mean exam score of a class was 75%, with a standard deviation of 15%,what percent of students…

A: Given,mean(μ)=0.75standard deviation(σ)=0.15

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

A: As per our guidelines we are suppose to answer only one question. Given,mean(μ)=$360standard…

Q: A recent Gallop Poll indicates that 80 % of voting age adults disapprove of Congress. If 700 voting…

A: Let p be the probability that a voting age adult disapproves of Congress. Given that p = 0.80 Let X…

Q: The average pre-school cost for tuition fees last year was P17,250. The following year, 20…

A: Given that  Population mean = 17250 Sample mean = 16150 Sample size (n) = 20  Alpha = 0.10. By using…

Q: A study of the Physics and Astronomy department has found that 95% of the graduate students drink…

A: Explanation:Here given the two means and find out the standard deviation of the sample follows the…

Q: A chemical engineer claims that the average daily yield of a chemical manufactured in a chemical…

A: The standard error is,

Q: State the conclusion in the problem context.   We fail to reject H0. It is not reasonable to…

A:

Q: Suppose that IQ scores have a bell-shaped distribution with a mean of 104 and a standard deviation…

A: Given, Mean, mu= 104 Standard deviation, sigma= 17 We know that,  Z score= (X-mu)/sigma

Q: The golf scores for a school team were normally distributed with a mean of 68 and a standard…

A: Let X be the golf scores. It is given that X is normally distributed with mean 68 and standard…

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: The test scores of students in a class test has a mean of 70 and with a standard deviation of 12.…

A: Given,mean(μ)=70standard deviation(σ)=12

Q: The mean score on the SAT in 2017 was 1060, and the standard deviation was 195. Assume the scores…

A: Given,  Mean μ=1060  Standard deviation σ=195Let x be score of a randomly selected person

Q: If research samples 28 college students and wants to compare the sample mean of 8 to the population…

A: From the provided information, Sample size (n) = 28 Sample mean (x̄) = 8 Population mean (µ) = 12…

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

A: Chebyshev's theorem and empirical rule are used to calculate the percentages of data lies within…

Q: A teacher claimed that the average score of students in Math class was 77 with a sample standard…

A:

Q: A study at the University of Colorado at Boulder shows that running increases the percent resting…

A:

Q: When 40 people used Weight Watchers for one year, their mean weight loss was 3.0 lbs and their…

A: The test hypotheses are given below: H0:μ=0 lbsHa:μ>0 lbs From the given information, the…

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A: Given information: The distribution of the number of phone calls answered each day is bell-shaped…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 253 and a standard…

A: From the provided information, Mean (µ) = 253 Standard deviation (σ) = 80

Q: The waiting time for patients at a local walk-in health clinic follows a normal distribution with a…

A: We have to find hypothesis..

Q: A chemical engineer claims that the average daily yield of a chemical manufactured in a chemical…

A: Introduction:The null hypothesis is defined as a statistical hypothetical statement which is…

Q: According to the College Board, scores on the math section of the SAT Reasoning college entrance…

A: Given information, Mean =516 Standard deviation =116

Q: According to a dietary study, high sodium intake may be related to ulcers, stomach cancer and…

A:

Q: The combined math and verbal scores for students taking a national standardized examination for…

A:

Q: The asking price for homes on the real estate market in Baltimore has a mean value of $286,455 and a…

A: Balitmore mean = 286455 sd = 11200 DenverMean = 188468sd = 8230

Q: NebNas manages the credit department for a grocery store chain in the province, and she would like…

A: Given, The null hypothesis, H0:μ=95 The alternative hypothesis, H1:μ≠95 sample size, n=100 sample…

Q: A study shows that Michigan teachers have measures of job dissatisfaction that are normally…

A:

Q: A researcher hypothesizes that the average number of sports that a college offers for males is…

A:

Q: A non-symmetric dataset has a mean of 200 and a standard deviation of 15.  Find an upper bound for…

A: Given: μ = 200 σ = 15 Solution: First calculate one sigma limit  μ ± σ = 200 ±15=185, 215 Two sigma…

Q: If a raw score is 28 in a distribution in which the mean is 20 and the standard deviation is 2, what…

A: Given information- Population mean, µ = 20 Population standard deviation, σ = 2 We have to find the…

Q: For a random sample of 125 British entrepreneurs, the mean number of job changes was 1.91 and the…

A: The hypothesis test to compare the means can be conducted using the standard normal distribution and…

Q: Cushman and Wakefield reported that the average annual rent for office space in Tampa was $17.63 per…

A: H0 : ? =17.63     H1 : ? ≠17.63     Population mean = ? = 17.63 Sample S.D = s =3.64…