A production process is checked periodically by a quality control inspector. The inspector selects simple random samples of 30 finished products and computes the sample mean product weight T. If test results over a long period of time show that 5% of the T values are over 2.1 pounds and 5% are under 1.9 pounds, what are the mean and the standard deviation for the population of products produced with this process? Use z-table. Mean (to 1 decimal) Standard deviation (to 2 decimals)

Q: What percentage of fire station response times are under 3 minutes

A: Let X denote the response times for fire departments. Given that X follows N(mean = 4.5, SD = 1.2),…

Q: sume that a normal distribution of data has a mean of 24and a standard deviation of 6. Use the…

A: Given that  The data is normally distributed with Mean (μ) = 24 Standard deviation (σ) = 6  We know…

Q: A normal distribution has a mean of 120 and a standard deviation of 5. Find the z-score for a data…

A: The objective of this question is to find the z-score for a data value of 119 in a normal…

Q: Assume that the scores of a college entry exam are normally distributed with a mean of 400 and a…

A: Given,mean(μ)=400standard deviation(σ)=60

Q: he fill volume of cans filled by a certain machine is normally distributed with mean 12 oz and…

A: Z be the standard normal distribution Where as, Z = (X-µ)/σ  Now in above mean (µ)  = 12 and…

Q: Response time is an important statistic for measuring the effectiveness of a fire department, and is…

A: Using stardization of Normal distribution

Q: Approximately what percentage of normally distributed data values will fall within 2 standard…

A: It is known that, normal curve is a symmetric and bell shaped distribution.

Q: How many individuals are described in this table? How many females were among the respondents? The…

A: It is given that The individuals are classified according to gender and the question asked about…

Q: Find the standard error of the distribution of sample proportions for samples of size 30 from a…

A: The objective of this question is to calculate the standard error (SE) of the distribution of sample…

Q: Calculate the distance for a Sunday skate that would put it in the shortest 1.5% (bottom 1.5%) or…

A:

Q: The following is a list of 14 measurements. 8, -13, -3, 47, -47, 37, 69, -52, -28, 23, 27, 58, -42,…

A:

Q: Determine the minimum sample size needed if we want to estimate the mean age of Camden County…

A: Obtain the required sample size: The given confidence level 100*(1–α)% = 95%. The critical value is…

Q: Head circumferences of some males have a bellshaped distribution with a mean of 57 centimeters and a…

A: Head circumferences of some males have a bellshaped distribution : Bell shaped distribution means…

Q: A normal distribution has a mean of 150 and a standard deviation of 8. Find the z-score for a data…

A: The objective of this question is to find the z-score for a data value of 151 in a normal…

Q: Total biomass (g) of prairie plants growing in each of 20, 0.5 m² plots. Half of the plots were…

A: Given: Treatment Burned(x) Treatment Unburned(y) 10.56 8.85 11.97 8.01 9.01 7.13 10.33…

Q: The mean and variance of population with sample size is 100 is 20 and 4 respectively.Calculate the…

A:

Q: Average temperatures in MMáy in a certain city are normatly distributed with a mean ef 70 degrees…

A: From the given information, Consider, X is the temperatures in May that follows normal distributed…

Q: The age distribution of a sample of 5000 persons is bell shaped with a mean of 40 years and a…

A: GivenMean(μ)=40standard deviation(σ)=12

Q: are normally distributed with a mean of 100 and a standard deviation of 15. What IQ is in the 90th…

A: Kwe have to find out given probabiity..

Q: Assume the random variable X is normally distributed with a mean of 50 and a standard deviation of…

A:

Q: The average height of young adult males has a normal distribution with standard deviation of 2.8…

A:

Q: The amount of weight on an ACME tractor trailer is known to have a normal distribution with mean 9.5…

A:

Q: for a normal distribution with a population mean of 74 and a standard deviation of 8, what is the…

A: given data normal distributionμ = 74σ = 8to saperate top 60% x = ?

Q: According to Our World in Data, male heights follow a normal distribution with µ =178.4 cm and o=…

A:

Q: Data collected on the total number of minutes people spent in the local emergency room revealed that…

A:

Q: Weights of incoming college freshmen are normally distributed with a mean of 150 lbs. and a standard…

A:

Q: Response time is an important statistic for measuring the effectiveness of a fire department, and is…

A: Given X is normal Distributed with mean µ = 4.5 and standard deviation σ = 1.2 now will using…

Q: Head circumferences of some males have a bellshaped distribution with a mean of 57 centimeters and a…

A: Head circumferences of some males have a bell-shaped distribution with a mean of 57 centimeters and…

Q: Identify any outliers. Select the correct choice below and, if necessary, fill in the answer box to…

A: we take the given data in ascending orderHence the Here we can say  is appears to be outlier or it…