QUESTION 8 An extensive survey in 1970 revealed preschool children spend an average of 6.3 hours per day watching television. The distribution of TV times in normal with a population standard deviation of 2 hours. Last year a sample of 100 preschool children had a mean of 5.8 hours of TV watching per day. Test to determine if the average time preschool children spend watching TV per day has decreased at the 0.01 significance level. Part A- Ho: H = Part B- Ha: H Part C-State alpha Part D-Reject null if (Answer f should be the inequality

Q: 5. Discuss the implications of changing the level of significance to a larger value. What mistake or…

A: Given data of random sample size of 30 to monitor a process on a ongoing basis in a consulting…

Q: Question 3 The students in an AFDA class have a mean height of 66 inches and a standard deviation of…

A:

Q: Question 1 A nutritionist conducted a survey to study the blood pressure(mmHg) of 8 randomly…

A: (a)

Q: Question 5 The Department of Health is concerned about the consultant fee charged by doctors. The…

A: Given Information: Sample size n=368 Sample mean x¯=328 Population standard deviation σ=29…

Q: Question 8.1.25-T Assigned Media v The shape of the distribution of the time required to get an oil…

A: Let, X: The time required to get an oil change at a 20 minutes oil change facility. The shape of the…

Q: QUESTION 14 When engaging in weight-control (fitness/fat burning) types of exercise, a person is…

A:

Q: Question 8 Consider this scenario:  A cereal-packing company where the content of cereal boxes must…

A: The standard error of the mean can be formulated as the possible likely distance that can take…

Q: QUESTION 4 A recent study (“Snack Ads Spur Children to Eat More,” The New York Times, July 20, 2009,…

A: The sample size for children who watched a cartoon with food advertising ate(First sample) is 59,…

Q: A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the…

A: 43 Use EXCEL Procedure to obtain the value of sample mean. Follow the instruction to obtain the…

Q: Question 20. part C. Nationally, patients who go to the emergency room wait an average of 7 hours…

A: Given: Sample mean waiting time x¯= 5.8 Sample standard deviation (s)= 1.7 Sample size of patients…

Q: Question 18 A survey conducted by National Association of Colleges and Employers found that 76% of…

A: (18) Given that, n=200,p=0.76 The mean of the sampling distribution of sample proportion is, μp^=p…

Q: QUESTION 5 A recent study based on 25 families showed that the average cost of education, from…

A:

Q: Question 6) The standard deviation value of the products in factory A is 25 g. The weight average of…

A: GivenFor factory An1=sample size of factory A=300x¯1=sample mean of factory A=450 grσ1=population…

Q: When testing (at the 5% level of significance) whether the proportion of peole who are contributing…

A: Test is that whether the proportion of peole who are contributing has increased.

Q: uestion 7.6. A sample of 105 sanitation workers for the city of Euonymus, Texas, earns an average of…

A: Given Information: Sample size n=105 Sample mean x¯=24,375 Hypothesized value of population mean…

Q: help me fix a         thank you!

A:

Q: QUESTION 6 The mean diameter of a ball bearing produced by a certain manufacturer is 0.50 cm with a…

A: Given Data Population Mean,μ = 0.5 Population Standard Deviation,σ = 0.02

Q: Question 5 The solar energy consumed (in trillion BTU) in the United States by year from 2000 to…

A: Please find the step by step explanation below. Here we should find the 95% confidence interval and…

Q: Question 20             Annual expenditure for prescription drugs was $838 per person in the…

A: (a) Here, the claim of the test is that the sample data support the conclusion that the population…

Q: Consider this scenario:  A cereal-packing company where the content of cereal boxes must have a mean…

A:

Q: The performance on a nationally standardized aptitude test in a certain professional field is…

A: Given data, Mean=500 sd=100

Q: (QUESTION 7) A doctor has claimed that the creatinine level of hemodialysis patients is less than 7.…

A: Given data: Population mean = 7 Sample mean  = 5.9 Sample standard deviation  = 4 Variance = 64…

Q: The mean labour productivity (output per worker per hour, in Rand) of a random sample of 26 textile…

A: From the chi square distribution, n-1s2o2 follows chi square distribution with (n - 1) degrees of…

Q: Question 4 (a) The mean lifetime of 200 mobile phones in a sample is 1,000 hours and their standard…

A:

Q: Question 4 Find a 95% confidence interval for the mean time required for an oil change at a local…

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Q: The sales representative for a manufacturer of a new product claims that the product will increase…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: QUESTION 5. (Data file included: Yes; In Sheet: Quality): Quality Associates, Inc., a consulting…

A: Hey there! Thank you for posting the question.  “Since you have posted a question with multiple…

Q: QUESTION 6 The temperature readings for 20 spring days in Manila are normally distributed with a…

A:

Q: Question 7 A career services specialist at a large university is charged with tracking the…

A: n1=19, n2=12  Sample mean for MBA(finance)x̄1=65700  Sample mean for MBA(traditional)x̄2 =65700…

Q: QUESTION 4 estimate the mean of a normal population whose standard deviation is 31, with a margin of…

A:

Q: During 2008, college work-study students earned a mean of $1478. Assume that a sample consisting of…

A: Hypothesis: H0:μ=1478H1:μ>1478 This is a right tailed test since the claim is to check that…

Q: cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: From the given information we want to find the probability that sample mean is below 365

Q: Consider this scenario:  A cereal-packing company where the content of cereal boxes must have a mean…

A: We have to find standrad error of the mean..

Q: QUESTION 12 What sample size should be used in a study conducted to estimate the average monthly…

A: From the provided information, Population standard deviation (σ2) = 1.96 Confidence level = 99%…

Q: QUESTION 3 A hardware store determined the current balances for a random sample of 100 customers…

A: Ans - Sample mean = $100  ans sample standard deviation (s) = The Population standard deviation (σ)=…

Q: QUESTION 16 A certain machine makes electrical resistors having a mean resistance of 50 ohms and a…

A:

Q: Question 8: A 1991 survey of 1984 graduates of different colleges in the East of the U.S.,…

A: Solution

Q: QUESTION 4 A recent salary survey at a large multinational corporation was carried out. Analysis of…

A:

Q: Question 6 The Wall Street Journal reported that almost all the major stock market indexes had…

A: μ = 27, σ = 20, x = 30 z = (x - μ)/σ = (30 - 27)/20 = 0.15 P(x ≥ 30) = P(z > 0.15) = 0.4404 μ =…

Q: Data from the Bureau of Labor Statistics reports that the typical manufacturing worker in Wisconsin…

A:

Q: The distribution of the weights of a certain type of mangoes is normally distributed with a mean of…

A: The random variable permeability index follows normal distribution. The population mean is 150. The…

Q: According to ongoing clinical research into feline health, the weight of an obese adult male…

A:

Q: QUESTION 5. The English department at Arizona State University measured the vocabularies of its…

A: Given that The English department at Arizona State University measured the vocabularies of its…

Q: QUESTION 16 A bottling company produces bottles that hold 20 ounces of liquid. Periodically, the…

A:

Q: Question 4 Most graduate schools of business require applicants for admission to take the Graduate…

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Q: Question 3 A. The management of White Industries is considering a new method of assembling its golf…

A: 3 ( A ) We have given that  Sample size n = 24 Sample mean = 40.6 Standard deviation = 2.7 Note…

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: Sample size n = 14 Sample mean x = 5.8 hours Sample standard deviation s = 1.7 hours Nationally, the…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.