A store manager, using his data for the past four years, presents his sales using a bar graph. Under what branch of Statistics does this belong? a) Descriptive statistics                      c) Qualitative data b) Inferential statistics                         d) Quantitative data

Q: y produces steel rods. The lengths of the steel rods are nor standard deviation of 2.5-cm. which is…

A: The mean is 188.5 and the standard deviation is 2.5.

Q: i dont understand how you got the 0.58

A: The mean is 8 and the variance is 16.

Q: The number of household members, x, and the amount spent on groceries per week, y, are measured for…

A:

Q: Suppose Professor Alpha and Professor Omega each teach Introductory Biology. You need to decide…

A:

Q: A correlation coefficient (r) of .40 implies that: ____ Group of answer choices 16 percent of the…

A: Given that r =0.40 Select the correct choice

Q: A real estate agent compares the selling prices of homes in two municipalities in southwestern…

A:

Q: * If n=32, x=26.2, o=5.15, a = 0.05:answer the following Two questions Q8. The confidence interval…

A: We have given that,  Sample mean (x̄) = 26.2, population standard deviation (σ) = 5.15, sample size…

Q: 4: Two mathematics teachers working in a school want to compare whether there is a difference…

A: Given information: Teacher A Teacher B 78 83 60 45 51 54 50 44 45 15 40 40 27 71…

Q: Given 50 multiple-choice items in their final test in 23 38 28 46 45 44 21 18 43 Find & interpret…

A: For decile first we have to order the data in increasing order: n=30…

Q: An airline is trying two new boarding procedures, Option 1 and Option 2, to load passengers onto…

A: Given: Significance level α = 0.05 For option-1: Sample size n1 = 250 Sample mean X1 = 17.6 Sample…

Q: Problem Set 1. Measures of Central Tendency Instruction: Construct a frequency distribution of the…

A:

Q: inversecdf(normaldist (μ,o)p) The length of wear on Spinning Tires is normally distributed with a…

A: Given data: μ = 60000 σ = 5000   Formula Used: Z-score = X-μσ

Q: A data set lists weights (lb) of plastic discarded by households. The highest weight is 5.56 lb, the…

A: Given X=5.56 X-bar=2.099 S=1.101

Q: matics teachers working in a school want to compare whether there is a difference between the…

A: Given: Teacher A Teacher B 78 83 60 45 51 54 50 44 45 15 40 40 27 71   85

Q: Suppose Z∼N(0,1). Calculate P(Z ≤ 0.91)

A: Let Z be the random variable from standard normal distribution with mean = 0 and standard deviation…

Q: Refer to the accompanying data display that results from a sample of airport data speeds in Mbps.…

A: Given n=50

Q: Without doing any computation, put the following in order from least to greatest, assuming the…

A: Given: μ = 100σ = 15

Q: 8. Your unlucky friend Unlucky Louis just played the game and lost 15 points after 50 rolls! Just…

A: Given: x=15 z=0.3

Q: The student council is hosting a drawing to raise money for scholarships. They are selling tickets…

A:

Q: CHA 2 12--011 c) (pop 100--2011--2001-200-20GHA

A:

Q: Given the interval estimate for the mean (9.4, 11), the point estimate for the mean is and the…

A: The confidence interval is (9.4, 11).

Q: A manager at a farm is curious about if the size of the Colossal Cantaloupe melons that they grow at…

A: Given: μ=37n=29x¯=38.4s=5.1α=0.05

Q: d            KGS (X)                SAT(Y) A            52           49 B             49…

A: The following data are the college entrance exam (KGS) and verbal comprehension test (SAT) scores of…

Q: The Smoky Bear Trucking Company claims that the average weight of a fully loaded moving van is no…

A: a) The test hypotheses are: Null hypothesis: H0: μ ≤ 12,000 Alternative hypothesis: H1: μ >…

Q: Based on the diagram below make a flowchart for a t test for a mean.

A: Given:

Q: What are some possible topics for a research paper that uses a secondary source that is about…

A: Here we want to discuss some possible topics for a research paper that uses a secondary source that…

Q: A company produces mosquito repellants that have a period of effectiveness that is approximately…

A: Given : sample size, n =40 sample mean, x̄ =294 population standard deviation,σ=12…

Q: One year, the mean age of an inmate on death row was 40 6 years. A sociologist wondered whether the…

A: Given: μ = 40.6 x¯ =38.9 s = 8.4  n = 32

Q: (a) What is the probability a randomly selected student in the city will read more than 96 words per…

A: It is given that  Mean, μ = 91 Standard deviation, σ = 10 Sample size, n = 11

Q: Jocelyn has an assignment to ask at random 10 of her classmates about their grades in Math. The data…

A: Given : Grades : 89,76,75,88,75,72,84,80,75,81 number of students (n)=10 Percentile formula :…

Q: Is that a big baby? The average birth weight in the US is µ ≈ 120 ounces (7 pounds, 8 ounces) with…

A: The average birth weight in the US is µ ≈ 120 ounces (7 pounds, 8 ounces) with a standard deviation…

Q: The proportions of blood phenotypes A, B, AB, and O in the population of all Caucasians in the…

A:

Q: Is this correct or incorrect? Why? A 95% confidence interval is always preferable over a 90%…

A: Given:    A 95% confidence interval is always preferable over a 90% confidence interval because a…

Q: Independent random samples from normal populations produced the results shown in the table to the…

A: To calculate the pooled estimate .

Q: Moreover, Dr. Castillejo suspects that other than maximum pulse rate (from 152bpm to 196 bpm), other…

A: Regression are used to determine the linear relationship between two variable, they are independent…

Q: thee workers' monthly salary follows a normal distribution. The avarage is $3,000 and the variance…

A: From the provided information, Mean (µ) = 3000 Variance (σ2) = 260000 X~N (3000, 260000) Here X be a…

Q: A company XYZ issued 30 year bonds with 10% annual coupon rate at their par value of $1000 in 2010.…

A:

Q: The following is the age distribution of 1,000 persons working in a large industrial house:…

A:

Q: 5. A multiple choice test has 5 questions. For a subject making random guesses for each answer, the…

A: Solution-: We have following probability distribution table: X P(X) 0 0.4096 1 0.4096 2…

Q: Independent random samples from normal populations produced the results shown in the table to the…

A: Given n1=5 n2=4

Q: Name Normal Distributions Worksheet (12-7) A set of data with a mean of 45 and a standard deviation…

A: Mean (μ)=45 Standard deviation (σ)=8.3

Q: The mean of 50 readings of a variable was 7.43 and their S.D. was 0.28. The following ten additional…

A:

Q: Call centers today play an important role in managing dayto-day business communications with…

A: Since we only do up to three subparts of a problem, we'll be doing the first three sub parts only.…

Q: A survey was conducted for 100 grade ten students about their grades for the third grading period. T…

A: n= 100 Di=L + i*n10-cff.c

Q: A set of data with a mean of 45 and a standard deviation of 8.3 is n Find each value, given its…

A: A mean is 45 with standard deviation 8.3 normally distributed. μ=45σ=8.3

Q: 4. (a) Twelve balls are distributed at random among three boxes. What is the probability that the…

A: 4.) a.) The total number of balls =12 The total number of boxes =3

Q: Researchers examined the candy bar consumption of college undergraduates and found that males ate…

A: Consider that μ as the population average amount of candy consumed by female undergraduates.

Q: her estimates that 39 out of every 100 of its online customers is a man who does not live within 50…

A: Given: P(A) = 0.78 P(M and A) = 0.39 A : online customers do not live within 50 miles of one of its…

Q: Let X be a stochastic variable with a N(8,16) distribution. Suppose P(X<b) = 0.719. Calculate the…

A:

Q: A fair 12-sided die is tossed. Find P(4 or at least 5). That is, find the probability that the…

A: Solution-: A fair 12 sided die is tossed. We want to find, P(4 or at least 5 )=?