11) A random sample of 40 videos posted to YouTube was selected. A month later, the number of times that each had been viewed was tabulated. The mean number of viewings was 165 with a sample standard deviation of 339. Find the upper bound of the 99% confidence interval for the mean number of times videos nosted to YouTube have been viewed in the first month.

Q: 2. A recent survey conducted by the National Telecommunication Commission (NTC) aims to determine…

A: Given x¯=140s=30n=28

Q: e in the upper 2.5% of admission test scores in order to qualify for a very competitive nursing…

A: The z score can be calculated as: z=x-μσ The required z score that is associated with the top 2.5%…

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

A: Given that the distribution of the number of phone calls answered each day by each of the 12…

Q: 3. The mean and standard deviation of the scores of a random sample of 45 Grade 11 sludents who took…

A: Data for the question 2 is missing. I am solving 3 for you. 3. Given, n = 45 X¯ = 76S =…

Q: 2. A study of recent graduates from your school reveals that for a accounting majors the mean salary…

A: Given that  Sample sizes n1=20 , n2=18 Sample mean s x1=30000 , x2=29000 s1=2000 , s2=1500

Q: The growing seasons for a random sample of 64 U.S. cities were recorded, yielding a sample mean of…

A:

Q: Suppose that a random sample of sixteen recently sold houses in a certain city has a mean sales…

A:

Q: The standard deviation of the running time of a sample of 200 fuses was found to be 100 hours. Find…

A:

Q: . If a pilot study reveals the mean size of homes in a town to be 120 square meters with a standard…

A:

Q: 2) A random sample of 56 fluorescent light bulbs has a mean life of 645 hours. Assume the population…

A:

Q: Suppose a sample of 30 Statistics students are given an IQ test. If the sample has a standard…

A: Given n=30, sample standard deviations s=12.23

Q: The CEO of Global Investment Funds claims that, on average, clients leave their  investment funds…

A:

Q: A random sample of 16 workers was taken from the workers of one of the factories, and it was found…

A: Given- A random sample of 16 workers was taken from the workers of one of the factories, and it was…

Q: 6. A research article reported that for a random sample of 850 meal purchases made at fast food…

A: We have to perform left tailed test for the difference in means and since sample size is large…

Q: 5. A researcher surveyed of 300 young adults ages 18-29 found that on average, those surveyed sent…

A: 5. Given that, n=300x¯=67.7s=23.6 Confidence level=90% Significance level=1-0.90-0.10…

Q: A random sample of 4040 adults with no children under the age of 18 years results in a mean daily…

A: In statistical inference, there are two types of estimation,  Point estimation and Interval…

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

A: Given that, Mean = 39 Standard deviation = 7

Q: Suppose a college determines the average commute time of a random sample of 50 students to be 45…

A:

Q: From a random sample of 68 businesses, it is found that the mean time that employees spend on…

A: Given dataSample size(n) = 68Sample mean = 4.9 standard deviation = 0.35Significance level(α) =…

Q: A random sample of 40 home theater systems has a mean price of $500 and a standard deviation of $60.…

A: Construct the 99% confidence interval for the population mean The 99% confidence interval for the…

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

A: Solution: Let X be the number of phone calls answered each day by each of the 12 receptionists is…

Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A:

Q: Form a 90% confidence interval on the difference in the means. population std dev group mean 6.

A: Given,    Group n Mean Population standard  deviation 1 30 20.5 1.5 2 30 14.5 1.5

Q: Suppose that a random sample of eighteen recently sold houses ina certain city has a mean sales…

A:

Q: A random sample of 42 business students required an average of 43.4 minutes to complete a statistics…

A:

Q: In a recent study of 42 eighth graders, the mean number of hours per week that they watched…

A: Mean = 19.6 Standard deviation = 5.8 Sample size n = 42

Q: 4. The manufacturer of a certain brand of auto batteries claims that the mean life of these…

A: From the provided information, Sample size (n) = 36 Sample mean (x̅) = 43.75 Sample standard…

Q: a) Construct the 89% confidence interval for the population mean time. (b) If all the other…

A: (a) The sample size is 48, sample mean is 3.12, and standard deviation is 0.09. The degrees of…

Q: Suppose from random sample of 500 teenagers, the mean number of sweaters owned was 12.5 and a…

A:

Q: Based on a random sample of 1,020 adults, the mean amount of sleep per night is 8.09 hours. Assuming…

A:

Q: A random sample of 250 students at a university finds that these students take a mean of 14.7 credit…

A: Given:

Q: A simple random sample of 35 cars and trucks in Vermont have a mean price of $18,702 with a standard…

A: In this question, we have given information35 cars and trucks in Vermont have mean $18702 and…

Q: Researchers have estimated that office workers in Belgium receive an average of 15 e-mails per day.…

A: It is given that, The sample mean is 15. The sample standard deviation, s is 3.5. The sample size, n…

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

A: Given that the distribution of the number of phone calls answered each day by each of the 12…

Q: In a sample of 56 tax returns filed by local hotel managers in a recent year, the taxable incomes…

A: Given: n=56 Mean= 41225 Standard deviation = 6112

Q: In a survey sample of 83 respondents, the mean number of hours worked per week is 39.04, with a…

A: Solution : The complete solution is given below in the attachment file.

Q: A random sample of 550 credit-card holders shows that the mean annual credit-card debt for…

A: Given information   Sample size (n) = 550 Mean x̅  = $8220 Standard deviation (s) = $1102…

Q: Suppose a paper reported that the freshman year weight gain for the students in a representative…

A: Given datasuppose a paper reported that the fresh mean year weight gain for sample of 103 fresher…

Q: Suppose a paper reported that the freshman year weight gain for the students in a representative…

A:

Q: In a survey conducted by the Gallup Organization, 1100 adult Americans were asked how many hours…

A: The survey has been conducted in the Gallup organization,  1100 adult Americans and asked them that…

Q: has a mean life of 480 hours, construct a 99% confidence interval for the mean of the flashlights…

A: here population standard deviation  = 35 sample size  = 150  sample mean   = 480 and Z-critical for…

Q: 2. An electrical firm manufactures light bulbs that have a length of life that is approximately…

A:

Q: Based on information about the Miami Heat Basketball team, throughout the years 2010 and 2011, the…

A:

Q: Suppose Apple claims that the average wait time for a customer calling the Apple Care support line…

A:

Q: A microwave company claims that their microwaves can pop popcorn in under 2.25 minutes. After 134…

A: Ho: their microwaves can pop popcorn in under 2.25 minutes.  H1: their microwaves can not pop…

Q: Estimate the average number of feathers that a mature tom turkey has with 90% confidence interval by…

A: It is an important part of statistics . It is widely used .

Q: A 92% confidence interval for the mean number of cucumbers a plant produces per season was…

A:

Q: A random sample of 12 chemists from Washington State shows an average salary of $39,420 with a…

A: Hypotheses:Let µ1 be the true average salary of chemist in Washington State.Let µ2 be the true…

Q: A sample of 30 Microsoft employees yielded a mean of 44 hours worked per week with a standard…

A: A sample of 30 Microsoft employees are collected. Sample mean number of hours worked per week is 44…

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.