a total of 20 applicants came in for a job interview. Among them, four were 45 years old, six were 39 years old, three were 42 years old, five were 40 years old, and two were 35 years old. Let x be the age of a randomly selected applicant. Solve for the mean, variance, and standard division.

Q: How many levels are in each factor of a 2 x 2 ANOVA? 2. 4. 8. can not determine

A: How many levels are in each factor of a 2 x 2 ANOVA? 2. 4. 8. can not determine Explanation: Here,…

Q: In a box of 250 components produced by a company, 2% are defectives. What is the variance of the…

A:

Q: Find the weighted mean of the number of sheets on a roll of toilet paper: 7 brands have 22 sheets on…

A:

Q: When testing for the difference between 2 population variances with sample sizes of n1=8 and n2=10,…

A:

Q: A factory for the production of light bulbs took a random sample of 200 units and found that 18 of…

A: The sample size is N=200N = 200 the number of defective cases is X=18X = 18 and the sample…

Q: A random sample of 324 residents of a community revealed that 30% were very satisfied withthe…

A: Given that, Critical values: By using the standard normal table of Z, the critical value for two…

Q: A grocery store has determined that in crates of tomatoes, 95% carry no rotten tomatoes, 2% carry…

A: Given: The probability that crates carry no rotten tomatoes is 0.95. The probability that crates…

Q: A footwear retailer sold 7 pairs of sneakers for $55 each, 5 pairs of leather shoes for $160 each, 8…

A:

Q: a. Out of a random sample of 74 birds, how.many would you expect to live longer than 9 years? b.…

A: Let X = number of years a bird lives.  Then, X ~ Exponential (0.125) Thus,  f(x) = 0.125e-0.125x .

Q: what is the z score that corresponds to P18

A: The standard normal variable Z follows normal distribution with mean 0 and standard deviation 1.

Q: .In sampling a large number of electronic chips manufactured by a machine, the mean number of…

A: First we have to find the probability of atleast 3

Q: Find the variance of the given population. -10, -11, -12, 12, 11, 2, 11, 22 O 165.84 O 135.67 O…

A:

Q: Did the samples shown most likely come from the same population, or two different populations? If…

A: Given :

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample isneeded in…

A:

Q: Find the variance for this data set of numbers: 58,64,24,28,38,46

A: Given sample is: 58,64,24,28,38,46. Sample size = n = 6.

Q: One sample with n=4 scores has a mean of 12, and a second sample with n=6 scores has a mean of 8.…

A: Given information Sample 1 n1 = 4, µ1= 12 Sample 2 n2 = 6, µ2= 8

Q: A worker at a frozen yogurt store has 2 3/4 cups of frozen yogurt to give to customers as samples.…

A: We have to find no. Of samples , using all the frozen yogurt.

Q: 2. Compute the mean for the difference scores.

A: First we have to calculate the difference in scores for each participants.

Q: sample of n = 12 observations has a sample mean of

A:

Q: About 7% of males are colorblind. Hoping to find many colorblind men for her study, a researcher…

A: It is given that p =0.07 and n = 433.

Q: A quality-conscious disk manufacturer wishes to knoww the fraction of disks his company makes which…

A: Given, The no. of sample, n =5431 The number of defective, x = 4943

Q: How many success in the sample? How many failures in the sample? ? What size sample does the…

A: Answer:-  Given, n=1800

Q: of 90% with a sample

A: Given : Sample size = n = 19 Significance level, α =1- 0.9 = 0.1

Q: One sample of n = 4 scores has a mean of M = 12, and a second smaple with n = 6 scores has a mean of…

A:

Q: If in a discrete data, 75% of the values are less than 30, then......?

A: we know that,  If Q1 is first quartile then we can say that 25% data points are below Q1. If Q2 is…

Q: a. If a constant c is added to each xi in a sample, yielding yi = xi + c, how do the sample mean and…

A: Mean: For a set of n observations, x1, x2, ... , xn mean is defined as, Median: For a frequency…

Q: Find the variance for the population consisting of the measurements ½, ¼, 1/3, ½, and 1/8 by using…

A: The population mean is, μ=∑XN=12+6+8+12+35=415=8.2 The population mean is 8.2.

Q: The symbol μ¯xμx¯ represents the mean of a sample of size n. True False

A: The given statement is TRUE. Because, the symbol µx-bar represents the mean of a sample size, n

Q: A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On average, how…

A: Given A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On…

Q: To study the mean blood pressure of all people in her state, Christine samples the population by…

A:

Q: A footwear retailer sold 12 pairs of sneakers for $45 each, 11 pairs of leather shoes for $140 each,…

A:

Q: For a team with 1318 turnovers in a season, find the expected number of wins in a season.

A: It is given that Regression equation of y on x is y = 102 - 0.05x

Q: A researcher selects all of the possible samples with n = 8 scores from a population and computes…

A: The mean of the sampling distribution of the sample mean is an unbiased estimator for population…

Q: 300 books were selected at random from a library. If the mean length of books in this sample was 150…

A: Given that total books, n= 300 Mean, X bar= 150 and  Variance, sigma= √100 = 10 We know that z…

Q: The CEO of an airline estimates that 15% of all flights arrive late. How many flights must he…

A: Given Information: Proportion p=0.15 Confidence level = 96% = 0.96 Significance level α=1-0.96=0.04…

Q: Previously, an organization reported that teenagers spend 8.5 hours per week, on average, on the…

A: Given information: The data represents the number of hours per week teenagers spend on the phone.

Q: A machine that fills beverage cans is supposed to put 12 ounces of beverage in each can. The…

A: Given that the claim is " The variance is differs from 0.02". Null Hypothesis: H0:σ2=0.02…

Q: A pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: From the provided information, Study indicates that proportion of left-handed scientists is 9% that…

Q: A telecommunications company knows that 90% of their customers own smart phones. Ten customers are…

A: Let "X" be the customers who own smartphones. The variance of the binomial distribution is given by

Q: In a survey,  55% of the voters support a particular referendum. If 40 voters are chosen at random,…

A: Given that, 55% of the voters support a particular referendum.  Sample size = 40

Q: A previous study showed that 69% of community college students have read a book for personal…

A: Given info: A previous study showed that 69% of community college students have read a book for…

Q: rcher asked a random sample of students at the library on a Friday night, “How many hours a week do…

A: If the selected sample or data for analysis is selected in such a way that randomization is not…

Q: Ten students took their practical exam in Science. Out of 50 items ,they obtained the following…

A: Given : scores(x):  44, 49, 42 , 25 , 29 , 21 , 39 , 40, 47 , 45

Q: The mean weight of 15 wrestlers is 110 kgs. The mean weight of 5 of them is 100 kgs and another 5 is…

A: Given that, the mean weight of 15 wrestlers is 110 kgs. The mean weight of 5 of them is 100 kgs and…

Q: Show that it is possible to find the 3-median of n numbers using O(n) comparisons.

A: It is possible to find the 3-median of n numbers using O(n) comparisons

Q: In what range would you expect to find the middle 50% of most head breadths? and Between If you were…

A:

Q: The length of a fully grown hibiscus plant is normally distributed and has a mean 35cm. It is found…

A: Given information: μ=35, σ=? x = 45 Px>45=0.05

Q: Use the method of variation of p

A: Given, the initial value problem                       x'=Ax+f(t), x(a)=xaHere          A=3-11-2,…

Q: Which of these countries has the greatest population density? Which has the least? Pro

A:

Q: The symbol ¯xx¯ represents the mean of the sample. True False

A: The given statement is TRUE. Because, the symbol x-bar represents the mean of a sample.