Researchers conducted two surveys about teens are their use of social media.  The first survey asked a random sample of 800 U.S. teens about their use of Instagram.  A second survey asked the same questions to a random sample of 2253 Canadian teens.  In these two studies, 73% of U.S. teens and 88% of Canadian teens said that they use Instagram.  Use these results to answer the following questions about the proportion of U.S. and Canadian teens that use Instagram.  (Round to the nearest whole hundredth as needed).

Q: Nationally, the proportion of red cars on the road is 0.12. A statistically-minded fan of the…

A: The following hypothesis can be formed

Q: Mika studies if age correlates with the average number of hours of sleep, so she selected a random…

A: Given: Age(x) 8 15 22 27 34 40 Sleep(y) 8 8 7 7 5 6

Q: A researcher surveys a group of college students to determine the negative life events that they…

A: The pooled variance for the two samples is obtained as follows:

Q: A nursing school professor is interested in determining how her college students compare to the…

A: The sample mean is given by, X¯=∑iXiN=185517=109.117 We have the, Null Hypothesis(H) :…

Q: Mary and Gary are both doing research on the effects of sleep deprivation on critical thinking. Mary…

A: Hello! Thank you for the question. As per the honor code, we are allowed to answer three sub parts…

Q: When a data set has one or two values that are much higher than all of the others which of our 3…

A: As Mean is found by adding all the values and dividing by the number of values So if one or two…

Q: The number of faculty and the number of students are shown for a random selection of small colleges…

A: Let x be the independent variable and y be the dependent variable. The number of faculty depends on…

Q: To test the effectiveness of a new drug designed to relieve flu symptoms, 200 patients were randomly…

A: Given data: Significance level = 0.05 Given claim: The proportion of patients who took the drug was…

Q: A math teacher researches the relationship between 7th and 8th grade involvement in speech and…

A: The total number of students in the 8th grade is, 19+21=40

Q: An American Automobile Association (AAA) study investigated the question of whether car owners or…

A: The percentage of chance of occurrence of an event is calculated  by dividing the number of…

Q: The results of a nation wide Gallup poll concerning a person‘s race and their        opinion on the…

A: Giventhe opinion on the death penalty are given below The number of the people opposed to death…

Q: A fast food chain surveyed a random sample of students to determine what pizza they prefer. Cheese…

A:

Q: sports psychologist tests a new coaching method and finds that of the 43 novice athletes who were…

A:

Q: Rats were given one of four different diets at random, and the response measure was liver weights as…

A: Please note that as per our guideline we can answer three sub-parts only. Please repost the…

Q: A statistician wants to determine if there is a difference in the fuel efficiency of cars between…

A: Given info: The claim of the test is there is a difference in the fuel efficiency of cars between…

Q: According to a recent report, 21% of all adults routinely skip breakfast. A researcher believes this…

A:

Q: Individuals with strong religious beliefs often turn to their faith to cope with stressful life…

A: Solution: The given table of data is

Q: In the recent Census, 3 percent of the U.S. population reported being two or more races. However,…

A: Given information: x1=9, n1=1000p1=x1n1=91000=0.009x2=17, n2=500p2=x2n2=17500=0.034

Q: The results of a nation wide Gallup poll concerning a person‘s race and their        opinion on the…

A: The summarized table is, (c) The percentage of the people in this study were Hispanic and opposed…

Q: Globally, 35% of all ridged brittleshell tortoises have spots on their shells. A herpetologist in…

A: Solution

Q: In the recent Census, 3 percent of the U.S. population reported being two or more races. However,…

A: Note: Hey there! Thank you for the question. As you have posted multiple sub-parts, we have helped…

Q: Has the proportion of Americans that are "20-somethings" decreased? According to the US Census…

A: Solution-: Given: x=65,n=500,P0=0.151,α=0.10 We want to determine, (e) p-value=? (f) At α=0.10…

Q: A doctor studies the side effects of a drug on male and female. Following data was obtained for a…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: A statistician for an automotive review magazine wants to determine whether there is a difference in…

A: Given info: The test statistic is t=6.163 The rejection regions are t<–1.860 and t>1.860. The…

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…

A:

Q: Mika studies if age correlates with the average number of hours of sleep, so she selected a random…

A: Consider that ρ is the population correlation coefficient between Age and Sleep.

Q: The following table gives the proportion of samples of college students in Washington as compared to…

A: Given that Total  number number of sample (n1) = 100 n2 = 100 Number of favorable events (x1)=42…

Q: ) If we randomly sample 1,000 people from a large population, and ask them a yes-no question, what…

A: The sampling distribution of p-hat (sample proportion) is approximately normal with mean p and…

Q: The medical community unanimously agrees on the health benefits of regular exercise, but are adults…

A: As per guidelines we will solve the first question only, please repost other questions for more…

Q: An article in the journal Applied Nutritional Investigation reported the results of a comparison of…

A: Solution

Q: use simple linear regression to find the parameters for the line that minimizes MSE for this time…

A: Note: We have used the excel data analysis tool to run the regression analysis.

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Step 2: n1=135 n2=175 x1=14 x2=8 The sample proportion of p^1 is, p^1=x1n1    =14135   =0.104

Q: The results of a recent poll on the preference of shoppers regarding two products are shown below.…

A: 16)

Q: A sample of 200 students at a large university was taken after the midterm to ask them whether they…

A: Given that: Sample size (n) = 200     Did well on midterm Did poorly on midterm total Row…

Q: A CBS News poll conducted June 10 and 11, 2006, among a nationwide random sarmple of 651 adults,…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Among students at a nearby college, the proportion who say they're interested in their congressional…

A:

Q: A seven-year medical research study reported that women whose mothers took the drugDES during…

A:

Q: . In words, define the Random Variable for this test. b. Which distribution (Normal or student's-t)…

A: Given : In the recent Census, 3 percent of the U.S. population reported being two or more races.…

Q: The medical community unanimously agrees on the health benefits of regular exercise, but are adults…

A: Given: The medical community unanimously agrees on the health benefits of regular exercise, but are…

Q: A nursing school professor is interested in determining how her college students compare to the…

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

Q: A CBS News poll conducted June 10 and 11, 2006, among a nationwide random sample of 651 adults,…

A: Given data,   Better Same Worse Total Republican 38 104 44 186 Democrat 12 87 137 236 None…

Q: In statistics, how are power, alpha, and type 1 and type 2 error all related?

A: Type 1 error is the error of rejecting a true null hypothesis. This happens when the value of the…

Q: A medical student at a community college in city Q wants to study the factors affecting the systolic…

A: The test statistic is, t=b1-β1SEb1=0.90-00.55≈1.64 Thus, the test statistic is 1.64. The degrees of…

Q: A survey of 40 students at a local college asks, "Where do you buy the majority of your books?" The…

A: Since, you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: A U.S. magazine, Consumer Reports, carried out a survey of the calorie and sodium content of a…

A: Given that: Calorie content of different brands of beef and poultry hotdogs: Beef hotdogs:…

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Solution: Given information: n1= 115 Sample size of new engine x1= 12 new engine failed n2= 120…

Q: The medical community unanimously agrees on the health benefits of regular exercise, but are adults…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: A psychologist conducted a survey of the attitude towards the sustainability of American energy…

A: As per our guidelines,we are allowed to answer first three sub-parts only , Thanks. Please post…

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Given data : x1= 14.0 n1= 135 x2= 8.0 n2= 175

Q: In the past decades, there have been intensive antismoking campaigns sponsored by both federal and…

A: