In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 55 and a standard deviation of 7. Using the empirical rule (as presented in the book), what is the approximate percentage of daily phone calls numbering between 48 and 62?

Q: A sample of 16 scores has a standard error of 12. What is the standard deviation of the population…

A: The standard error of the mean is,

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

A:

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: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.47 and a…

A: Empirical rule: The probability that the observation under the normal curve lies within 1 standard…

Q: A survey of nonprofit organizations showed that online fundraising has increased in the past year.…

A: Given that Sample size n = 50 Sample mean,M = 29 Sample SD, s = 7 The critical value of t at 90%…

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

A:

Q: When Nachelle runs the 40o meter dash, her finishing times are normally distributed with a mean of…

A: The empirical rule for normal distribution states that 95% of data lies within 2 standard deviations…

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

A:

Q: An article in American Demographics claims that more than twice as many shoppers are out shopping on…

A: GivenMean(μ)=180standard deviation(σ)=20

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

A:

Q: In a study of employee stock ownership plans, satisfaction by employees is measured and found to be…

A: Given,mean(μ)=4.89standard deviation(σ)=0.63sample size(n)=450

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

A:

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

A:

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

A:

Q: A manufacturer is interested in the output voltage of a power supply used in a PC. Output voltage is…

A:

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

A: Empirical reules:1)68% of observations falls within the first standard deviation (µ ± σ)2)95% within…

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

A:

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: The CEO of a large financial institution claims that, on average, their clients invest more than…

A: Given sample details : Sample Mean (Xˉ)(\bar X) = R74 000 Sample Standard Deviation (s)(s) = R7 000…

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

A: Normal Distribution: Normal Distribution is the bell-shaped symmetric distribution of continuous…

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

A: The bell shaped curve is called normal distribution which is symmetric about the mean. According to…

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

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: A small computing centre has found that the number of jobs submitted per day to its computers has a…

A:

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

A:

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

A: Given, The distribution of the number of daily requests is bell shaped with mean of 52 and standard…

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

A: Empirical rule: The probability that the observation under the normal curve lies within 1 standard…

Q: In a particular community, it is claimed that the mean household water usage for a particular month…

A:

Q: An article in American Demographics claims that more than twice as many shoppers are out shopping on…

A: Let X be the random variable from normal distribution with mean (μ) = $180 and standard deviation…

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 community health plan wishes to estimate the mean number of visits per plan participant in a year.…

A: Given that Margin of Error, E = 2 Population SD = 6.3 Level of confidence = 0.95 The critical value…

Q: Suppose in a city of 100,000 residents, a survey was conducted with size of 1650. If Forty-two…

A: GivenThe sample size = 1650The percentage of population opposes the new taxes for the geothermal…

Q: Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of…

A: Confidence interval are used to estimate the interval where the true popualtion parameter can…

Q: A small centre has found that the number of jobs submitted per day to its computers has a…

A: The empirical rule for variables is as follows: 68% of all possible observations lie within one…

Q: For a normally distributed data set with mean 20 and standard deviation 4.  According to the…

A: Solution-: Given: μ=20,σ=4 We want to find what percentage of the data lies between 8 and 32?

Q: BIG Corporation produces just about everything but is currently interested in the lifetimes of its…

A: Given: Sample Size n=1000Mean x¯=889Standard Deviation s=97

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: The CEO of a large financial institution claims that, on average, their clients invest more than…

A: Null hypothesis:   H0: µ≤150,000   Alternative hypothesis:   Ha:µ>150,000.

Q: A state school administrator says that the standard deviation Or SAI critical reading test scores is…

A: Given Population standard deviations σ=114, sample size n=19, sample standard deviations s=143…

Q: The daily demand for six-packs of Coke at Mr. D’sfollows a normal distribution, with a mean of 120…

A: Given: Let X be the number of six packs ordered daily. Given: X is normally distributed. Mean of X =…

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

A:

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

A: It is given that the number of phone calls answered each day by the each 12 receptionists follow…

Q: The hotel industry has been greatly impacted by the COVID-19 pandemic. Suppose that traditionally…

A:

Q: In a study of academic procrastination, the authors of a paper reported that for a sample of 20…

A: It is given that sample mean is 5 hours and the standard deviation is 2.2 hours.

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

A: Let "X" be the number of phone calls answered each day.

Q: In a particular community, it is claimed that the mean household water usage for a particular month…

A: Hypothesis testing is conducted for the parameters of the population like population mean,…

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

A: We first find the z scores of 30 and 70z score of 30=30-5010=-2z score of 70=70-5010=2

Q: The CEO of a large financial institution claims that, on average, their clients invest more than R95…

A: Null Hypothesis: H0: The average invest is not more than 95,000 Alternative Hypothesis: H1: The…

Q: . For this​ process, what is the proportion of shafts with a diameter between 23.991 mm and 24.000…

A: According to the answering guidelines we can answer only three subparts of a question and the rest…

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.