Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 13.9 years and a standard deviation of 1.7 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 9.5 years? P(X < 9.5 years) = Enter your answer accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.

Q: The average percent of correct responses on the midterm last semester was 78% with a standard…

A: Given that  Mean = M = 78 , Standard deviation = SD = 6 Z-score = 1

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: The Z-score of is given by, Z-score = Actual Value - MeanStandard Deviation

Q: On Rhea's twitter account her tweets over the years have averaged about 35 likes per tweet with a…

A: Given Information: Hypothesized value of population mean is μ0=35 Population standard deviation σ=10…

Q: The percent of fat calories that a person in America consumes each day is normally distributed with…

A: Let X denote the percent of fat calories that a person in America consumes each day is normally…

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 79 beatsminute…

A: Given that population mean = 79 beats/minute population standard deviation = 10 beats/minute

Q: The life of sunshine cd players is normally distributed with a mean of 4.2 years and a standard…

A:

Q: The chemical concentration of a particular chemical in a lake is to be measured. Assume it is known…

A: We have to find given probability.

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given,Mean(μ)=69standard deviation(σ)=2.8and Z-score=3.6

Q: The mean amount of time it takes a kidney stone to pass is 15 days and the standard deviation is 4…

A: GivenMean(μ)=15standard deviation(σ)=4

Q: A particular fruit's weights are normally distributed, with a mean of 522 grams and a standard…

A: GivenMean(μ)=522standard deviation(σ)=32sample size(n)=20

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given,mean(μ)=69.0standard deviation(σ)=2.8and Z-score=0

Q: Accrotine researchers have show that the watches have an average life of 28 months before certain…

A: It was stated that Accrotine researchers have show that the watches have an average life of 28…

Q: A sample of 3000 observations has a mean of 88 and a standard deviation of 13. The distribution is…

A: Solution :  Given:   n   = 3000 samples              x¯   = 88               s   = 13 For bell…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given that  Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: The mean height The standard deviation The value of z-score is

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…

A: Given data,μ=866σ=159P(X&lt;862)=?

Q: AC mei neights n a mean o a standard deviation of 2.8 inches. Fin man with a z-score of 3.75 (to 4…

A: Let X be the hight of men from Normal distribution with mean (μ) = 69.0, standard deviation (σ) =…

Q: The lifespan of a certain insect is believed to follow a normal distribution

A: Life span = X and follows normal with μ=98 and σ=7   We know that (x-μ)/σ follows N(0,1) so,…

Q: Researchers at a National weather center in the North Eastern United States recorded the number of…

A: To determine whether the data indicate that the past four years have had significantly more 90°days…

Q: The time needed for university students to complete a quick math test follows a normal distribution…

A: The objective of this question is to perform a hypothesis test to determine whether the mean time to…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: we have to find given x Value.....

Q: The average American man consumes 9.8 grams of sodium each day. Suppose that the sodium consumption…

A: a) From the given information, the mean and standard deviation are 9.8 grams and 1 grams. The…

Q: scores are randomly distributed with a mean of 100 and a standard deviation of15. If a genius is…

A: Here we want to know score which separate top 1%. That is we find the 99 percentile.

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 80…

A: Here we are given that X: healthy adults have pulse rate /minute  = population mean =80 beats/minute…

Q: The patient recovery time from a particular surgical procedure is normally distributed with a mean…

A:

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A:

Q: A biology researcher is studying the risk of extinction of a rare tree species in a remote part of…

A: Solution

Q: Suppose that the TSH (Thyroid Stimulating Hormone) levels among healthy individuals are normally…

A: Given that  TSH (Thyroid Stimulating Hormone) levels among healthy individuals are normally…

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 79…

A: Based on the provided information, Mean=79 beats/minute Standard deviation=10 beats/minute

Q: Male and female populations of to under 80 years old are represented by age in the table below.…

A: The question is about frequency distribution.Given :

Q: The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30.…

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: calcium levels in people are normally distributed with a mean of 9.6 MG and a standard deviation of…

A: X~N( μ , ?)   μ=9.6 , ?=0.3   Z-score =( x - μ )/?

Q: The average age of senators in the 108th Congress was 62 years. If the standard deviation was 12.5…

A: Solution: Let X be the age of senator. From the given information,

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.