The Los Angeles Times regularly reports the air quality index for various areas of Southern California. A sample of air quality index values for Pomona provided the following data: 28, 42, 58, 48, 45, 55, 60, 49 and 50. 1. Compute the range and interquartile range. 2. Compute the sample variance and sample standard deviation (to 2 decimals). 3. A sample of air quality index readings for Anaheim provided a sample mean of 48.5 , a sample variance of 136 , and a sample standard deviation of 11.66. What comparisons can you make between the air quality in Pomona and that in Anaheim on the basis of these descriptive statistics? Choose the correct option: a. the aire quality is much better in pomona b. the air quality is much better in anaheim c. the air quality variability is greater in pomona d. the air quality variability is greater in anaheim

Q: The table below shows the number of employees within a small construction company classified…

A: The question is about frequency distribution Given :   To find : Standard score for the 20 years of…

Q: Part E question: What is P(B)? If necessary round your answer to two decimal places)

A: Given that  S = (E1, E2, E3, E4, E5, E6, E7), P(E1)=0.10, P(E2)=0.20, P(E3)=0.10, P(E4)=0.25,…

Q: A probability distribution for the given experiment is as follows. 0 1 2 3 O X P(x)

A:

Q: What does it mean when you have standard deviations of 27 35 and 32 and its effect on the validitity…

A: Standard deviation (SD) is a measure of dispersion. It measures how the data are spread around the…

Q: For the past 10 years, you have been observing the sales of your company since you embarked on an…

A: Advert Sales 10 44 9 40 11 42 12 46 11 48 12 52 13 54 13 58 14 56 15 60

Q: Note. Please give me correct and detailed information regarding my question. I have posted my…

A: Given: σ2 = 0.015 n = 25 s2 = 0.029 Formula Used: Test-statistic χ2 = (n-1)s2σ2

Q: can you reject the null hypothesis with 95% confidence?   Question 14 options:   yes   no   it…

A: It is given that  p-value = 0.06 Confidence level = 95%

Q: 5. Problem 5. (a) Consider a sample space C = {1, 2, 3, 4, 5, 6, 7, 8, 9), where each of these…

A:

Q: A college professor never finishes his lecture before the end of the hour and always finishes his…

A: Given: f(x) = kx20≤x≤20Otherwise Mean E(X) = 0.7778 Standard deviation σ =  0.1313

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A:

Q: In sample of 10000 bets a casino's  mean profit  is 0.38.  Suppose you know the population  standard…

A: Given Information: Sample size n=10000 Sample mean x¯=0.38 Population standard deviation σ=4 Claim:…

Q: Specify the estimation model you will use (the econometric form). Identify the independent and the…

A: Ans1. The estimation model which will be used (the econometric form) is simple linear regression…

Q: An economist is studying the effect of education on salary and conducts a survey of 150 randomly…

A: Given: An economist is studying the effect of education on salary and conducts a survey of 150…

Q: The figure below shows relative frequency histogram for 50 employees working in a small construction…

A: Given :

Q: Each of the possible seven outcomes of a random experiment is equally likely. The sample space is…

A:

Q: Find the sample variance and standard deviation. 6,51,11,51,38,24,34 Choose the correct answer…

A: Measures of Dispersion: The data scatterings are demonstrated by the measure of dispersion. It…

Q: a. A random sample of 180 students from a private kindergarten produces mean weight of 46.3kg with…

A: Data given (a)  n=sample size=180, sample mean x̄=46.3, sample standard deviations s=4.7

Q: 162.0 172.1 186.8 176.4 184.9 186.8 Send data to calculator V 27,880.2 32,951.52 34,539.32 Figure 1…

A: It is given that the random variable x denoting the height ( in cms ) of human father and the…

Q: A random sample of 36 automobiles traveling on a section of an interstate showed an average speed of…

A:

Q: find the mean of the Variable X.. find the Standard deviation.

A: Solution - Given that , probability distribution of X  x P(X=x) 0 0.093 1 0.327 2 0.411 3…

Q: 2. Consider the following hypothesis test: Η:μ280, Η :μ <80, A sample of 160 is used and the sample…

A:

Q: Based on a​ poll, 70​% of Internet users are more careful about personal information when using a…

A: In this case, each surveyed user is inferred to have only options of being "more careful" (i.e.,…

Q: The probability of drawing a heart from a deck of cards is 0.25 over the long term (under an…

A:

Q: find the value K and F(x).

A:

Q: Example 3. Present the following data by horizontal bar diagram. Bangalore Hydradad 11 9 City:…

A: Given data is: City Trichy Bangalore  Hyderabad  Mysore Ooty Population (Lakh) 8 9 11 7 3

Q: A random sample of 64 student workers showed that they called in sick from work an average of 10…

A: Given Sample size n=64, sample mean x̄=10, standard deviations σ=3  Construct 95% CI for population…

Q: so which answer is it?

A: Here we have to define the definition of standard deviation

Q: n 1898, L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected…

A: given data  x = no. of deaths in corps in t year λ = 0.61 P(x=X) = e-λtλtxx! __________poisson…

Q: For a Gaussian random variable with = 0 and ₁=1, what is P(| X > 2) and P[X>2]?

A:

Q: The three most popular options on a certain type of new car are a built-in GPS (A), a sunroof (B),…

A: event A : has GPS B : has sunroof C : has automatic transmission P(A) = 0.53 P(B) = 0.60 P(C) = 0.76…

Q: probability that at most (3) samples out of (300) concrete cubes will fail in the test ?using…

A: Here given,  In building materials laboratory, it has been observed that a failure proportion of…

Q: Slack is the excess quantity for a binding decision variable.

A: Given:  Slack is excess quantity for a binding decision variable? True False

Q: Lionel has just received his monthly credit card statement. He placed 9 charges on his card in the…

A: The mean is $30.61 per charge.

Q: May is interested in purchasing the local hardware store in her hometown. After examining the store…

A: Given: n = 20 p = 0.6 Formula Used: Binomial distribution: X~B(n, p) P(X=x) = Cxnpx(1-p)n-x,…

Q: What is the highlighted area under the given Normal curve? u - 30 u - 20 u-o и то u + 20 μ+30

A: we have to find shaded area   as we know, area under standred normal curve represents probability

Q: Suppose the average weight of a sample of 25 packets of garlic cloves has a mean weight of  499.06g…

A: Given Sample mean x̄=499.06, sample size n=25, sample standard deviations s=5 Population mean μ=500

Q: In a certain college 25% of boys and 10% of girls are studying Mathematics. The girls constitute 60%…

A:

Q: A meteorologist stated that the average temperature during April in Atlanta was 75 degrees. A sample…

A: Test is that whether the average temperatures have been increasing.

Q: When purchasing bulk orders of​ batteries, a toy manufacturer uses this acceptance sampling​ plan:…

A: From the provided information, Sample size (n) = 57 A shipment contains 7000 batteries and 1% do not…

Q: Estimate 6 by the method of moments estimator.

A: In method of moments we equate the sample moments and population moments to get the required…

Q: A company with 16 interns must assign them to training programs. It must assign 6 to program A, 5 to…

A:

Q: A paper published reported on the life of the ladybug from eggs to adulthood. The following table…

A:

Q: The following table of values gives a company's annual profits in millions of dollars. Rescale the…

A: Introduction: It is required to identify the R2 value for the exponential regression model fitted to…

Q: For point estimators, such as xbar and pbar, the standard deviation is also called the Osampling…

A: We know, x¯ or p¯ is point estimator.

Q: Customers at a gas station pay with a credit card (A), debit card (B), or cash (C). Assume that…

A: We have given that Customers at a gas station pay with a creditcard (A), debit card (B), or cash…

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

A: As per our guidelines we are supposed to answer only one question per post so i am solving first…

Q: The following data represent the weights​ (in grams) of a random sample of 50 candies.   Determine…

A: Data given…

Q: Jill will either pass or fail her statistics course. These two possible outcomes are referred to as…

A:

Q: Find the number of ways that 6 teachers can be assigned to 4 sections of an introductory psychology…

A: The question is about counting Given : Total no. of teachers ( n ) = 6 No. of section ( r ) = 4   To…

Q: Show the five-number summary for the following data: 5, 14, 17, 9, 8, 13, 16, 11, 6

A: Given that  The data are : 5, 14, 17, 9, 8, 13, 16, 11, 6