(c) What percentage of students play video games for less than 64 hr per week? of the students play video games for less than 64 hr per week. (d) What percentage of students play video games for 57 or more hours per week? 1% of the students play video games for 57 or more hours per week

Q: n 2010, the population of a country A was approximately 3,370,611. In the same year, the population…

A: population of country B was -7346314 less than the population of country A

Q: If I decided to decrease the percentage of 80% alcohol to 65% by taking out an amount and replacing…

A: 1 liter amount has 80% alcohol. How much amount was replace by pure water to make 1 liter amount of…

Q: Use the following scores to find the value of EX-2 = 3 4 2

A: GivenX=3,2,4,2

Q: Jim found out after working for 6 months had earned 8 days of vacation time. How many days of…

A: Given Jim found out after working for 6 months had earned 8 days of vacation time

Q: The percentage of hands that are winning blackjack hands is enter your response here​%

A: Since we have calculated probability of selecting a black jack hand is P(Black Jack hand) = 64/1326…

Q: Find the n amount, given that with a 95 percent confidence the error is by three percentage points…

A: Formula : Margin of error: ME=Zα/2 * √p̂(1-p̂)/n

Q: Three brothers and their wives decide to have childrenuntil each family has two female children.…

A: Given: Each family needs two female children. So the total number of female children r, is 2+2+2=6…

Q: Two factory plants are making TV panels. Yesterday, Plant A produced 4000 panels. Ten percent…

A: Given that Plant A produced 4000 panels and defective is 10% Defectives from plant B is 3%,  overall…

Q: Susan ranks 10th in a class of 40. Her percentile rank is 75. Why 75 is her percentile rank?

A:

Q: f you read 20 minutes per day every day and end up reading 12 books in a year, each of which is of…

A: Number of books reading in a year = 12 Number of pages in a book = 200 Number of minutes read every…

Q: How did you get p value from hats given?

A: Solution-: We have test statistic=t_{stat}=-2.115 and df=87 We want to find the how to get p-value=?…

Q: Vhat percent of the population obtains scores of 410 or less? What is the minimum score needed to…

A: Let , X→N(μ=500 , σ=100) Our aim is to find following :  a) P(X≤410) b) The minimum scores needed to…

Q: d) Determine if Advertising is significantly related to Sales. Use a = 0.10.

A: #1. The random variable y is denoted as the weekly sales for its product, x1 be the unit price of…

Q: In about what percentage of countries would the percentage of people 65 and older be less than 0.10?…

A: Given Information: Mean μ=0.18 Standard deviation σ=0.04

Q: The nightshift workers in 3 of Super Bo’s specialty stores stock about 500 (SD = 12.56) products in…

A: Let μ be the population mean. The hypothesis is, Null hypothesis: H0:μ=496 Alternative hypothesis:…

Q: What is the range of Joey’s first 14 quiz grades? What is the range of Joey’s quiz grades after his…

A: a) Range of first 14 quiz Lowest value=74 Highest value=98   Range=Highest value-Lowest Value…

Q: Which of the following is the correct expression for 70% of X? . For a number X, 40% of X is what…

A:

Q: 13. Joe has a test average of 87 in mathematics. If his test average makes up 70 percent of his…

A:

Q: 40% of all people have cooties. 30% of all people play pattiecake and have cooties. What percent of…

A: Conditional probability is the chance of occurrence of an event given that another event has already…

Q: In a study, the rate of success of initial vaccination among 330 subjects receiving the 1:10…

A: Given: Sample size of subjects (n) = 330 Sample proportion or success rate p^=0.971 Hypothesized…

Q: A proportion .40 of the tagged birds were recovered. 150 were tagged in all. How many were…

A:

Q: find the p value when the test statistics is -6.61, the df is 10-1, and the level of significance is…

A: Find the p value if  t=-6.61 and df=10-1=9 Level of significance alpha=0.05

Q: A student has scores of 72%, 74%, and 78% on three exams. What percent score does he need on the…

A: Here we solve the inequality for x . x= score for the fourth exam.

Q: Two participating teams each received 5 litres of water for an outdoor activity on a certain day.…

A:

Q: Bobby likes to hike the trails near his house. On Sunday, he spent 4 hours hiking 8 miles. On…

A: On Saturday Distance (D1) = 8 miles Times (T1) = 4 hours On Sunday Distance (D2) = 12 miles To…

Q: Two types of medical devices used for knee replacement are being studied to see if the type of knee…

A: Given, The infection rate for a specific bacterial infection after surgery for device A is 0.0043.…

Q: 2. Jack went on a hike for 2 hours and 15 minutes. According to his fitness watch, he burned 1013…

A:

Q: The sales force at a certain company successfully closed 96 out 200 sales calls

A: It is given that, The salesforce at a certain company successfully closed 96 out of 200 sales calls.…

Q: In 2015, Gary earned $25,300. In 2016, he received a raise and earned $28,100. Comparing Gary’s…

A: follow next step

Q: A biology class of 26 students has an average of 77%. A chemistry class has 23 students. what was…

A:

Q: The proportion, po, of foraging bumblebees not exposed to pesticides who bring very little pollen…

A: Given: sample of 60 bumblebees(n)=60 39 bumblebees brought back vey little pollen to their nest…

Q: d. How many novels must be sold per month in order to make $350 of profit? e. What value of n will…

A: d) From the given information, the cost function is Cn=$1000+$2n and the revenue function is…

Q: The trunk diameter, in centimeters, of a certain variety of pine tree is represented by X~N(150,…

A: We have to find out the z-score for a tree with a diameter of 170 centimeter..

Q: Alex wants to know if his students prefer a chocolate flavor to a chocolate mint flavor. He counts…

A: In hypothesis testing we test the hypothesis regarding the population parameter.

Q: How would I solve this? The Fan Cost Index (FCI) represents the cost of four average-price tickets,…

A:

Q: Two factory plants are making TV panels. Yesterday, Plant A produced 8000 panels. Ten percent of the…

A:

Q: Last year’s freshman class at Big State University totaled 5,330 students. Of those, 1,265 received…

A:

Q: Q2 /: A society consisting of (1000) families, the average income of families is to be studied,…

A: Given : A society consisting of 1000 families. The average income of the families to be tested

Q: Haruka hiked several kilometers in the morning. She hiked only 666 kilometers in the afternoon,…

A: Given : Haruka hiked several kilometers in the morning.

Q: The number of passing and failing :students were as follows Number of Number of failing students…

A: Given data, Number of failing students=30 Number of passing students=70 Total number of students=100…

Q: We sell baby strollers. If price per stroller is p, we sell q = 300, 000 – 10p? -

A: Given information: Given that the price per stroller is p. The selling price is q = 300,000 – 10p2.

Q: Why does the use of multiple t tests increases?

A: The multiple t-tests are defined for a one-sample multivariate test and as well as for two samples.…

Q: Asians and Hispanics. At a=0.05, can you reject the claim that the proportion of newlywed Asians who…

A: Answer is explained below

Q: 4. The average score of Sam in his four tests is 85. If his first three test has an average of 88,…

A: As per our guidelines we are suppose to solve only first question if the multiple questions are…

Q: The proportion, po, of foraging bumblebees not exposed to pesticides who bring very little pollen…

A:

Q: For a dessert you are making, you have purchased 4 pounds of raspberries at $6.45 per pound. When…

A: given that for making a dessert, we need 4 pounds of raspberries at $6.45 per pound there is 3% trim…

Q: The pass result of fifty students who took up a class test is given below : Marks Number of Students…

A:

Q: 17. Maria, a sales representative for a large consumer goods company, is paid 3% of the total…

A: Given that Maria earned a total profit of her company =3% The average profit on sales=10% Maria's…

Q: The table shows the ratios of black socks to white socks in the women's and men's department of a…

A:

Q: Students surveyed boys and girls separately to determine which sport was enjoyed the most. After…

A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.