Our group is trying to develop a study to see if watching a youtube video of a massage therapist helps viewers to feel more relaxed, specifically in the areas being massaged (head, neck, shoulders). Viewers will watch a video with sound, a video without sound (but with subtitles). -What would be H0 and H1

Q: If the ski lift manager chooses to use the p-value approach for his hypothesis test, what does he…

A: Test is that whether the average has increased in recent years.

Q: Devin is a researcher for a pharmaceutical company testing whether a new prescription pain…

A: The hypothesized proportion is 0.06.

Q: According to a restaurant owner, the percentage of kindergartners in the U.S. who say pancakes are…

A: Given,n=200x=45and α=0.05

Q: Afranical analyst is wondering whether the proportion of young adults (ages 18-29) in the US would…

A: from the given data  the proportion is p= 0.16 size of sample is n=1000

Q: What distinguishes a quasi-experiment from a true experiment? When might a quasi-experiment be more…

A: The difference is that the criterion for assignment is selected by the researcher in a…

Q: What is the null hypothesis? a) The stress task will lead to an increase in stress hormones.   OR…

A: In this case we need find the correct null hypothesis.

Q: Your friend tells you that the proportion of active Major League Baseball players who have a batting…

A:

Q: A teacher gives a third grade class of n = 16 a reading skills test at the beginning of the school…

A: From the provided information,

Q: Historically, 15% of all Americans claim to have seen a UFO.  A paranormal researcher claims that…

A: Consider that p is the true proportion of Americans, who claimed to have seen a UFO.

Q: there anything else about the experiment in Question 2 which would cast doubt on the reliability of…

A: Given Group of Motorist % of new compound Average mm  1 5 8 2 5.5 8.4 3 6 8.6 4 6.5 8.8…

Q: James is a school psychologist who wants to implement stress coping skills to help his students. His…

A: Here the direction of the test is to the left.

Q: vey of randomly selected 8th, 10th and 12th graders from Humboldt County were asked if they used…

A: A Chi-Square for goodness of fit test is a test used to assess whether the observed data can be…

Q: In a survey of 240 students in an elementary statistics class at the University of California-Davis…

A: Given that : n=240                      x=19 (Left handed) x=221 (Right handed) By using one sample…

Q: Researchers are trying to determine if the prevalence of CVD is different in smokers compared to…

A: Here compare provenance of CVD BETWEEN non smoker and smokers

Q: Ride services are on the rise, such as Uber and Lyft. You wondered if the recent news reports of…

A: Given  19 males use ride services and 11 do not. 12 females use ride services and 18 do not.

Q: In a study of 785 randomly selected medical malpractice lawsuits, it was 485 of them were dropped or…

A:

Q: I need to turn this into a hypothesis test using a Ti84   As a dog owner I became curious as to…

A: State the hypotheses. That is, there is no sufficient evidence to conclude that the proportion of…

Q: Potential buyers for a new car were randomly divided into two groups. One group was shown the "A"…

A: Here, the potential buyers for a new car were divided into two groups. The researcher wants to…

Q: You are a process engineer for a company that manufactures widgets. A particular machine at your…

A:

Q: A social psychologist was interested in finding out whether the effect of leadership style on the…

A: For Democratic Leadership: For Autocratic Leadership:

Q: Last year's mean hourly wage (in dollars) for all hospital clerical workers in a large state was…

A: Given that  Last year's mean hourly wage (in dollars) for all hospital clerical workers in a large…

Q: 11% of all Americans suffer from sleep apnea. A researcher suspects that a different percentage of…

A: For the given data Perform Z test for one population proportion

Q: As of 2012, the proportion of students who use a MacBook as their primary computer is 0.31. You…

A:

Q: A random sample of 15 families representing three social classes has been observed for the frequency…

A:

Q: The local Hannaford is tracking mask compliance in their stores. In mid-March they found that only…

A: We have given that the sample proportion p=0.40

Q: If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make…

A: Solution: 4. From the given information, ZSTAT = –0.45 and the test is two-tailed.

Q: What's the difference between a one tailed t test and a two tailed t test?

A: We have given that  One tailed t test and a two tailed t test

Q: In a recent sample of 250 households, 45% of them owned a video game console. A hypothesis test was…

A: Type II error (β):   The probability of fail to reject the null hypothesis when alternative…

Q: You are conducting a study to see if the proportion of voters who prefer the Dernocratic candidate…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: It is known that 51% of American college students fail a course during their freshman year. A…

A: Given: P = 0.51 n = 9 X = 3 Formula Used: Test-statistic Z = p^-PP(1-P)n

Q: ail a course during their freshman year. A university journal club randomly samples 9 upperclassmen…

A:

Q: The Center for the Study of Violence wants to determine whether a conflict-resolution program in a…

A: Given that Before particular After participating 10 8 3 3 4 1 8 5 8 7 9 8 5 1 7 5…

Q: A random sample of 16 grade 12 students was randomly selected and interviewed, and the number of…

A: Let M denote the sample mean from sample of size n = 16. It is given that Sample size n = 16…

Q: alpha level for

A: Choosing the alpha level for a hypothesis test allows researchers to control the probability of…

Q: If the F-statistic is close to one, what would be the decision of a hypothesis test?

A: The F-statistic is the test statistic for F-tests. In general, an F-statistic is a ratio of two…

Q: In a recent study of a random sample of 113 people, 92 reported dreaming in color. In the 1940’s,…

A: The random variable dreaming in color follows binomial distribution. The sample size is 113. The…

Q: Test the claim that the proportion of people who own cats is smaller than 60% at the 0.025…

A:

Q: The currently used medicine is successful for 26% of patients. A new experimental medication is…

A: sample size(n)=500no.of patients successful for new experimental medication (X)=140sample proportion…

Q: Abigail, who works for a region's department of health, is looking for evidence that the percentage…

A: Given that Abigail is testing to check the claim that the percentage of current smokers in the…

Q: Determine the null and alternative hypotheses. Ho: H₂: Determine the test statistic. (Round to two…

A: The given table is   Drove when Drinking Alcohol?   Yes No Texted While Driving 735 3036 No…

Q: Microsoft would like to advertise that more than 30% of all its customers have more than two…

A: It is given that Microsoft would like to advertise more than 30% of all its customers who have more…

Q: According to a New York Times/CBS News poll conducted during June 24-28, 2011,55% of the American…

A: Let p denotes the true proportion of the people that believe that owning a home is an important part…

Q: A recent drug survey showed an increase in the use of drugs and alcohol among local high school…

A: Local: Sample size n1=100 Number of successes x1=65 National: Sample size n2=100 Number of successes…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.