16 and less than 20 (i) Calculate the mean and standard deviation for the above data.

Q: Suppose that a distribution of 400 items has mean 130 and standard deviation 5. Find the​ z-score of…

A: Given that.   X~N( μ , ?)   μ=130     , ?=5  , x=143   Z-score =( x - μ )/?

Q: o=58. From sample sizes of 36 adults find the proportion of sample means having values of at least…

A: here , sample size  = 36 population  mean = 162 population standard deviation = 58

Q: A normally distributed population has a population mean ? = 21 and standard deviation ? = 4. What…

A: Given Information: Mean = 21 Standard Deviation = 4

Q: 2. What is the z-score of x if x = 2 and the median = 4, the mean = 5 and the standard deviation =…

A: Given Mean μ = 5median = 4Standard deviation σ = 2

Q: Which one of the following relation between standard deviation (S.D.) and variance Var (: variable X…

A: What is the relationship between standard deviation and Variance?

Q: 4. Dunlop Company conducts tests on tires life. For a particular tires, the standard deviation is…

A: Given, Standard deviation is 6000 68% confidence interval is (102,000, 78,000). For a normal…

Q: Temperature ("F) 50-54 55-59 Does the frequency distribution appear to have a normal distribution…

A: Given the grouped frequency distribution.  The objective is to check whether the frequency…

Q: 4. An aptitude test has a mean of 230 and a standard deviation of 15. Find the corresponding z-…

A: Bartleby policy: Since you have asked multiple question, we will solve the first question for you.…

Q: An analysis of a data set (N = 16) has revealed that its standard deviation (SD) of 2. Then, what is…

A: GivenN=16standard deviation(SD)=2

Q: For a population with mean 90 and standard deviation 10, what is the z-score corresponding to X =…

A:

Q: A normally distributed population has a population mean ? = 40 and standard deviation ? = 5. What…

A: It is an important part of statistics . It is widely used .

Q: The data has a mean of 27 and a standard deviation of 3.8, rounded to the nearest tenth. How many of…

A: Given that  a data has a mean μ = 27                                  standard…

Q: Suppose that X is normally distributed with mean 110 and standard deviation 18.  What value of X…

A: Given that, Mean = 110 Standard deviation = 18

Q: f X is normally distributed with a mean of 42 and a standard deviation of 4, determine the interval…

A: given data, normal distribution,μ=42σ=4CI=0.95α=1-0.95=0.05

Q: In a plant nursery, the owner thinks that the lengths of seedlings in a box sprayed with a new kind…

A: Given: n=80x¯=20μ0=26σ=10α=0.05

Q: A researcher took a random sample of 25 observations from a normal population with a standard…

A: It is given that the sample size is n=25.The population standard deviation is σ=50.The population is…

Q: The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a…

A: Solution-: Given: μ=60,σ=11 What is the approximate percentage of 1-mile long roadways with potholes…

Q: A small amount of the trace element selenium, from 50 to 200 micrograms (ug) per day, is considered…

A:

Q: The sample mean x (with a bar above) is the best point estimator of the sample mean u(mu) True or…

A: Sample mean: The sum of the all observations of sample divided by the total number of observations…

Q: What is the standard error of the mean for a sample that has n=53 people and comes from a population…

A: It is given that n = 53s = 11

Q: Suppose that the amount of time per day that American adults spend on their mobile devices is…

A: From the provided information, Mean (µ) = 229 Standard deviation (σ) = 57

Q: Calculate Mean Deviation (i) from Mean () (ii) from Median () for the given data and verify that…

A: Given: x f 2 3 4 9 6 5 8 2 10 1

Q: If the coefficient of variation is 1% and the mean is 3.2, determine standard deviation (to four…

A: We have given that Mean(x̅) = 3.2 CV = 0.01

Q: What is the z-score of x = 9, if it is 0.133 standard deviations to the left of the mean?

A: Given X=9,

Q: A random variable is normally distributed with mean 14.2 and standard deviation 18.4. What value is…

A: According to the provided information, mean μ=14.2standard deviation σ=18.4z-score = 3

Q: The loss of production because the failed production.. Amount of production that thickness more than…

A: Parameter estimation can be of point or interval estimate. It involves estimation of a parameter of…

Q: 2 19.2. If the standard deviation of pulse rate in adul- ts of the age group of 20-25 is 9.9, and…

A:

Q: What would someone's approximate  stanine score be if their raw score was 79 from a group with a raw…

A: Given that Mean = 85 SD = 5 And raw score X = 79

Q: The salaries paid to the managers of a company had a mean of dollar 20,000 with a standard deviation…

A:

Q: ssume that stress level scores are normally distributed with a population mean of 25 and a…

A: Given data, Mean=25 sd =2.5 If n=9 P(23<X<26)=?

Q: For a set of data, μ = 71, X=35, z = -0.60. What is the standard deviation of the population?

A: Given that.   X~N( μ , ?^2 )   μ=71   , ?=?  , X=35 , z=-0.60   Z-score =( x - μ )/?

Q: A designer collected information on the price of a random sample of newly designed products and the…

A: Note: Hey there! Thank you for the question. As you have posted a question with multiple sub-parts,…

Q: Suppose X is normally distributed with H = 126 and unknown o. A sample of 27 observations yields a…

A: Given information Hypothesized mean µ = 126 Sample size (n) = 27 Mean x̅ = 122 Standard deviation…

Q: 2. The scores on a competency test for 2nd-year high school students have a normal distribution with…

A: