A sample of 200 college freshmen was asked how many hours per week they spent playing video games. The following frequency distribution presents the results. Number of Hours Frequency 1.0-5.9 28 6.0-10.9 31 11.0-15.9 16.0-20.9 21.0-25.9 26.0-30.9 31.0-35.9 36.0-40.9 41.0-45.9 46.0-50.9 Part 1 of 2 (a) How many classes are there? There are 10 classes. (b) What is the class with? The class width is 43 Part 2 of 2 Do not round. (c) What percentage of students play video games for less than 46 hr per week? of the students play video games for less than 46 hr per week. (d) What percentage of students play video games for 41 or more hours per week? % of the students play video games for 41 or more hours per week. 44 28 22 18 9 X G

Q: The assumption, "The children who attend academic after-school programs have higher grades than…

A: Alternative hypothesis is one in which a difference between two or more variables is anticipated by…

Q: The average retirement age in America is 64 years old. Do small business owners retire at an older…

A: Assume that μ is the population average retirement age in America.

Q: Standardized tests: In a particular year, the mean score on the ACT test was 24.8 and the standard…

A: a) Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: Intravenous fluid bags are filled by an automated filling machine. Assume that the fill volumes of…

A: Given Standard deviations=0.08

Q: Computers in Schools Elementary and secondary schools were classified by the number of computers…

A: The following information has been given: Computers 1-10 11-20 21-50 51-100 100+ School 3453…

Q: Hypotheses Η :μ = 78 H:μ<78 a Ho:μ=90,000 00.000 Type of Test (one-tailed or two- tailed)

A:

Q: Let X₁, , Xn be a random sample from a large population following a uniform distribution over [0,…

A:

Q: 1-The degree of freedom of a good fit test is equal to the sample size a- true     b- mistake…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: arch wherein subjects participated in a predetermined exercise run of 1. surements of oxygen…

A: Gender Male or Female Runtime  Time to run 1.5 miles Age age of the gym members in years…

Q: General Direction: Perform each of the following steps. a. Find the Spearman rank correlation…

A: Given that: 1980 2004 461 1065 879 3639 1686 4671 357 2764 3109…

Q: 1. In order to improve the health care delivery system in a primary hospital, a systematic procedure…

A: Given that, Sample size = n = 115 Sample mean = x = 10.8 Sample standard deviation = 1.13

Q: One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from…

A: Assume that p is the true proportion of illegal drug use in her school.

Q: b) Stage 1 high BP is specified as systolic BP between 140 and 160. What percentage of adults in the…

A: Given that.   X~N( μ , ?^2 )   μ=117     , ?=24   Z-score =( x - μ )/?

Q: x- Use the formula Z = σ x = 9 μ=6 σ = 8 Round to 4 decimal places Z = to find z when

A:

Q: Mean Dry_weight 0.30- 0.20 0.10 0.00- control 3dS 6dS Treatment 9dS 12dS Cultivars 1.00 2.00 3.00…

A: From the first plot, There are five treatments: control, 3dS, 6dS, 9dS and 12dS. The graph…

Q: A total of 220 students were surveyed on how long they sleep at night. They sleep for an average of…

A: A total of 220 students were surveyed on how long they sleep at night. They sleep for an average of…

Q: What is the dividend yield on Stock A that sells at $15/share, when Company A pays a quarterly…

A:

Q: Heights of WOMEN in the U.S. are normally distributed.   Recent information shows:    Adult women…

A: Given:

Q: Insurance companies are interested in knowing the percent of all drivers who always buckle up before…

A: According to the given information in this question We need to find the minimum number you would…

Q: Can you please write B up in writing as it is incorrect but I think it's because it's been converted…

A: f(x) = 3(x-1)^2, 0&lt;x&lt;1

Q: or more? 0.2546 0.1409 0.7454 0.9506 that a skydiver will be 46 years of

A: Given that.   X~N( μ , ?^2 )   μ=52.8     , ?=10.3   Z-score =( x - μ )/?

Q: their forms. rest. 11) An insurance company subcontracts two data processing firms to handle Firm #1…

A:

Q: A random sample of 26 local sociology graduates scored an average of 458 on the GRE advancef…

A:

Q: Find the mean and variance of the uniform probability distribution given by f(x)=1/n for x=1,2,3,4……

A: Given pdf is: f(x)=1n    for x=1,2,3,4.....

Q: Let X denote the amount of time a book on two-hour reserve is actually checked out, and suppose the…

A: Given Let X denote the amount of time a book on two-hour reserve is actually checked out, and…

Q: school registrar estimates that the dropout rate of freshmen high schools in Valenzuela is 6. Last…

A: Given that  Sample size n =500 Favorable cases x =90 Sample proportion p^=x/n  =90/500 =0.18

Q: I want to explain the

A: From the given plot, There are five treatments: control, 3dS, 6dS, 9dS and 12dS. In each treatment,…

Q: The random variable X is the crew size of a randomly selected shuttle mission. Its probability…

A:

Q: I want to explain these r

A: From the first plot, There are five treatments: control, 3dS, 6dS, 9dS and 12dS. The graph…

Q: Find the mean, median, and mode(s) of the data in the following stem-and-leaf plot. The leaf…

A: Given n=8

Q: The random variable X is the crew size of a ra 2 4 5 P(X-X) 0.025 0.045 0.306 C a. Find and…

A:

Q: Find the value of the standard score, z, and determine whether to reject the null hypothesis at a…

A:

Q: Q13. For the following set of numbers: 8, 12, 20, 6, 11, 12, 11, 12 a) Organise the data into a…

A: From the provided data

Q: Suppose 3% of items manufactured at a facility are defective. A random sample of 600 items are…

A:

Q: You may need to use the appropriate appendix table or technology to answer this question. A simple…

A: We have given that, Sample size (n) = 50, sample mean (x̄) = 38, population standard deviation (σ) =…

Q: State the null and alternative hypotheses. H₂₁:0² = 1 H₂:0² #1 H₂₁:0² > 1 H₂:0² $1 H₁:0² 1 H₂:0² 21…

A: Given that  Sample size n =23 Sample variance =1.6

Q: Let Z be a standard normal random variable and calculate the following probabilities, drawing…

A: As per our guidelines we can solve given three sub part (d, e, and f) of question  and rest can be…

Q: Five ²'s computed for fourfold tables in independent replications of an experiment are 0-50, 4-10,…

A:

Q: 11. The number of clubs dealt from a standard deck of cards without being replaced. This represents…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: Write your complete solutions. The final test and exam averages for 20 randomly selected students…

A: Solution Given data is

Q: Practice question 1 The price of the 25 # ordinary shares of Manco plc quoted on the Stock Exchange…

A: Given data

Q: Consider the following hypothesis test. 2 H₂:0₂ ² 2 (a) What is your conclusion if n₁ = 21, s, ² =…

A:

Q: 1. In order to improve the health care delivery system in a primary hospital, a systematic procedure…

A: Formula :

Q: Researchers record the fuel consumption of a car y (in miles per gallon) at various speeds x (in…

A: The least-squares regression line of their data is  y^=70.243−0.329x

Q: A regulation hockey puck must weigh between 5.5 and 6 ounces. The weights X of pucks made by a…

A:

Q: The probability that a randomly selected box of a certain type of cereal has a particular prize is…

A: Given: p = 0.1 q = 1-0.1 = 0.9 r = 3 Formula Used: Negative binomial distribution: A random variable…

Q: Evaluate E=z P₁ 91 P2 92 1₂ n₁ ==(Round to four decimal places as needed.) for z = 1.96, x₁ = 36, x₂…

A: Given that  Sample sizes n1=41 , n2=115 Favorable cases x1=36 ,x2=99 Z*=1.96

Q: Below is the raw data from a census of people per dwelling in a local area: 1 6 3 2 2 9 6 2 3 3 7 3…

A: For the given data,  We have to calculate mean, standard deviation by creating frequency table.

Q: reat Britain set a new Guinness World Record: the oldest ever skydiver. The World War II veteran,…

A: It is given that  Mean, μ = 52.8 Standard deviation, σ = 10.3

Q: A customer purchase 6.9 gallons of gas at the price 0f 2.759. How much do the owe u

A: Given customer purchase 6.9 gallons of gas at the price of 2.759