C. Mean for this distribution of sample mean Hz=( 81.0 +75.0 + 77.5 + 79.0 + 76.0 + 78.5 + 80.0 + 72.5 + 74.0 + 76.5)/10 = 77.0 The results can be used to make informed decisions about the population mean, because it represents a sample of the entire pop the informed decision regarding population mean is as follows, as sample sizes increases, the chance of getting the true populati- D. Standard deviation

Q: s of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15…

A: Given that Lengths of pregnancies are normally distributed. Mean (μ) = 268 days Standard deviation…

Q: Using attached chart calculate the standard deviation for overall grade average, assuming these 10…

A: The participant's overall grade average is,Researcher 2: Overall Grade…

Q: Supposed the Mean percentage in algebra shoe is 70% and the standard deviation is 8% what percentage…

A:

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

Q: You arrive into a building and are about to take an elevator to your floor. Once you call the…

A: The time taken by the elevator to reach a floor is uniformly distributed between 0 and 40 seconds.…

Q: |Mean and standard deviation of working life data of bulbs produced in a factory are 1406 and 153…

A: It is given that the working life is normally distributed with mean μ=1406 and standard deviation…

Q: The average salary of a male professor at a public four-year institution offering classes at the Dr…

A: Given Information : The average salary of a male professor at a public four-year institution…

Q: =9, median =13, standard deviation -5 Find the coefficient of skewness (round to two decimals)

A: Answer: From the given data, Mean (x¯) = 9 Median = 13 Standard deviation(s) = 5

Q: Suppose that the amount of time that students spend studying in the library in one sitting is…

A: (e)   Obtain the probability that their average time studying is between 45 and 50 minutes.   The…

Q: find out population standard deviation with clear all steps 65,69,86,36,45,25,31,74,32.1

A: ANSWER:- x x2 65 4225 69 4761 86 7396 36 1296 45 2025 25 625 31 961 74 5476…

Q: How do find the unexplained variation?  and indicated prediction interval

A: Given:

Q: Standard deviation of 411 and 649

A:

Q: Assume that math test scores are normally distributed with a mean of 500 and a standard deviation of…

A:

Q: Newborn babies: A study conducted by the Center for Population Economics at the University of…

A:

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: When you use the two-standard-deviations F-test, what assumption must be met by the variable under…

A:

Q: Lifetime of certain kind of lightbulbs have a Normal distribution with a standard deviation of 120.…

A: From the provided information, Standard deviation (σ) = 120 99% of lightbulb die at 920 hours. That…

Q: Lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of…

A: Let us denote X=the length of pregnancy    X follows a normal distribution with mean=268 and…

Q: The breaking strengths of cables produced by a certain manufacturer have historically had a mean of…

A: Given information Sample mean x̅ = 1905 pounds Population mean µ = 1900 pounds Sample size n = 90…

Q: For males born in upstate NY, the gestation times are normally distributed with a mean of 39 weeks…

A: Given, for males born in upstate NY, the gestation times are normally distributed with a mean of 39…

Q: Define P-value?

A:

Q: Mountain Mouse makes freeze-dried meals for hikers. One of Mountain Mouse's biggest customers is a…

A: From the above given data the following solution is provided below:

Q: Study on how much time people spend with family in a day shows that the time spending distribution…

A: We have find givan probability..

Q: mple of eigh scores on a national mathematics assessment test has a mean score of 266. This test…

A: According to the given information in this question, there are more than three subparts according to…

Q: A group of students take a Statistics Exam where the average was M = 90 and the standard deviation…

A:

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: Pregnancy Assume that the duration of human pregnan- cies can be described by a Normal model with…

A: The question is about normal distribution.Given :Population mean duration of human pregnancies (  )…

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

A:

Q: The standard error of the mean serves as a special type of standard deviation. Describe about it.

A: Standard error: Standard error is a measure which explains how accurate are the sample means to…

Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…

A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…

Q: Life Time of IC Chips manufactured by a semiconductor manufacturer is approximately normally…

A:

Q: Heights in a supopulation of 100 people are normally distributed with a mean of 180 centimeters and…

A: # Height of people follow normal distribution with mean=180 cm and standard deviations=10 cm  Then…

Q: Use the t-distribution to find a confidence interval for a mean μ given the relevant sample results.…

A: The sample results  are x¯=3.5, s=0.2, and n=100 Point estimate is x¯=3.5.

Q: What is the standard deviation of these numbers? (5,15,20,40,35)

A: Given numbers are : 5,15,20,40,35  Mean ; x¯=∑xn   =5+15+20+40+355   =23

Q: Mean =7, median =10, standard deviation =3 Find the coefficient of skewness (round to two decimals)

A: Answer: From the given data, mean = 7 median = 10  and standard deviation = 3

Q: Paramesan cheese is aged for an average of 24 months to allow it to develop the desire richness in…

A:

Q: Mean=8, median =11, standard deviation = 5 Find the coefficient of skewness (round to two decimals)

A: Answer: From the given data, mean = 8 , median = 11  and standard deviation = 5

Q: Find the population standard deviation of these numbers: 22, 19, 25, 16, 20 (round to two decimal…

A: Given numbers(x); x x2 22 484 19 361 25 625 16 256 20 400 ∑x=102 ∑x2=2126

Q: ompany XYZ know that replacement times for the DVD players it produces are normally distributed with…

A: To find: what is the time length of the warranty?warranty =_____ years