A survey of 20 randomly selected adult men showed that the mean time they spend per week watching sports on television is 10.58 hours with a standard deviation of 2.75 hours. Assuming that the time spent per week watching sports on television by all adult men is (approximately) normally distributed, construct a 90 % confidence interval for the population mean,   μ . Round your answers to two decimal places.

Q: A company specializing in building robots that clean your house has found that the average amount of…

A:

Q: Use z scores to compare the given values. Based on sample​ data, newborn males have weights with a…

A: From the provided information, Newborn male have weights with mean (µM) = 3287.8 g Standard…

Q: 1. A recent study of 25 motorists showed that they spent an average of P750 per week. The standard…

A: Note: since you have posted multiple independent questions in the same request we will solve the…

Q: In the 2018 General Social Survey, a random sample of 1666 adults in the U.S. was asked how old they…

A:

Q: The average daily volume of a computer stock in 2011 was μ=35.1million​ shares, according to a…

A:

Q: A 95% confidence interval for the mean hours freshmen spent on social media per day was calculated…

A: Solution: From the given information, the 95% confidence interval for the mean hours freshmen spent…

Q: A sample of 44 smartphone users found that on average they picked up their phones 34 times per day,…

A: Given data,n=44x=34s=7.2z value at 99% Confidence is Zc=2.576

Q: The manufacturer of a sports car claims that the fuel injection system lasts 48 months before it…

A: For the given data Perform t test for one sample mean

Q: he General Social Survey asked: “How many e-mails do you send in a day?” The results of 928…

A:

Q: In an examination of purchasing patterns of shoppers, a sample of 16 shoppers revealed that they…

A: From the given information, sample mean, x̅=54 Population standard deviation, σ=21 Sample size n =16…

Q: how many water specimens are required in the sample?

A:

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: Goofy Marketing Solutions conducted a survey among 16 randomly selected visitors to the newly opened…

A:

Q: A company wants to learn how much money Americans are spending at their drive-thru window. They…

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

Q: In a survey of a random sample of 49 college students, the sample mean time per week spent watching…

A: We have given that,  Sample mean (x̄) = 21, sample size (n)= 49, and standard deviation (s) = 8.2…

Q: according to the International Journal of Retail and Distribution Management (Vol. 39, 2011) survey…

A:

Q: A weekly tabloid reported that the average income of its subscribers is $39,100. Assume this…

A:

Q: A sample of 8 items has an average fat content of 18.6 grams and a standard deviation of 2.4 grams.…

A: Given : μ = 18.6σ = 2.4n = 8 As standard deviation is known so we will apply z test 99% confidence…

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: The average daily volume of a computer stock in 2011 was μ=35.1million​ shares, according to a…

A:

Q: In a questionnaire, a random sample of students were asked whether they studied for more than four…

A: The known values are, Critical values: By using the z-table, the critical value at 99.7% confidence…

Q: A sample of 50 students was taken from the local university. These students spent an average of R170…

A: Given information- Sample size (n) = 50 Mean x̅ = R170 Standard deviation (s) = R25.50 Significance…

Q: C. Find a 95% confidence interval for the average life time of all the television sets produced by a…

A:

Q: What sample size would be needed to estimate the average body temperature of humans if you wished to…

A: Given data,E=0.1z-value at 99% confidence is Zc=2.576σ=0.6n=?

Q: The mean blood sodium concentration of these 38 cases was 115 mmol/l, with standard deviation of 12…

A: Note:  Hey, since multiple questions are posted, we will answer first question for you. If you want…

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

A:

Q: Consider a population that follows a normal distribution with a known standard deviation o. By what…

A: Confidence interval: It is defined as the range which contains the value of true population…

Q: The ICU Admission dataset includes a variable indicating the age of the patient. Find and interpret…

A:

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

A:

Q: In developing patient appointment schedules, a medical center wants to estimate the mean time that a…

A:

Q: A random sample of 80 customers, who visited a department store, spent an average of $75 at this…

A: Solution: Given information: n= 80 Sample size x= $75  Sample mean σ= $16 Population standard…

Q: To find the standard deviation of the diameter of wooden dowels, the manufacturer measures 19…

A:

Q: Two sets of chromium analyses were performed on water samples from a stream that runs near a…

A: Given: Two sets of chromium analyses were performed on water samples from a stream that runs near a…

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: A 95% confidence interval for the mean hours freshmen spent on social media per day was calculated…

A:

Q: In a study it was found out of a random sample of 30 there was a sample standard deviation of 2.4.…

A:

Q: How much money does the average professional football fan spend on food at a single football game?…

A:

Q: A random sample of 16 light bulbs has a mean life of 650 hours and a standard deviation of 32 hours.…

A: Mean = mu = 650 Standard deviation = sigma = 32 25.0 Sample size = 16 Therefore standard error of…

Q: A random sample of 16 employees taken from the management level of the company gives a mean monthly…

A: Given that  Sample size = 16 , Mean = 17000 , Standard deviation = 5500

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: Given dataStandard deviation = 20Confidence interval = 0.95Significance level(α) = 1- 0.95 = 0.05n =…

Q: A sample data set, n = 115, shows human body temperatures with a mean of 99.6ºF. If the standard…

A: Given Data: n=115x¯=99.6σ=0.75   z-value corresponding to 99% Confidence Interval=2.576

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: A tire manufacturer investigated the tread life of its tires. Samples of 10 tires driven 50,000…

A:

Q: A random sample of 40 students has mean annual earnings of $3120 and a standard deviation of…

A:

Q: An agriculture publication claims that the population mean of the birth weights for all Suffolk…

A: a) From the given information, The samples size is 35. The sample mean is 5.41.

Q: The average daily volume of a computer stock in 2011 was μ=35.1million​ shares, according to a…

A:

Q: A large city newspaper periodically reports the mean cost of dinner for two people at restaurants in…

A: Determine the sample size n needed. Here, confidence level is 0.95. Use EXCEL Procedure for…

Q: The average salary of 81 random employees in a certain financial sector was 3400 USD. From past…

A: Population standard deviation=450 Sample size =81

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.