37. A researcher is interested in whether teenagers have changed how much they watch TV nowadays. Historically, it was known that teenagers watched 20 hours of TV per week with a standard deviation of 4 hours. Our researcher took a random sample of 50 teenagers and found that on average they watched 15 hours of TV per week with a standard deviation of 6 hours. Suppose the researcher was testing at the .01 level of significance and they got a P-value of .0086. What conclusion should they make? Group of answer choices Fail to reject the null hypothesis, teenagers watch the same amount of TV as in the past. Fail to reject the null hypothesis, there is not enough evidence to show that teenagers watch less tv than in the past Reject the null hypothesis, teenagers don’t watch the same amount of TV as in the past. Reject the null hypothesis, teenagers watch less TV than in the past

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: The objective of this question is to test the claim that there is a significant difference between…

Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.47 and a…

A: Empirical rule: The probability that the observation under the normal curve lies within 1 standard…

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Let be the group runners training for marathons be population 1 and       be the individual runners…

Q: A researcher wants to test if there is a significant difference in the mean salary between men and…

A: We have given that For Men: Sample size (n1) = 50 Sample mean (x̅1) = 62 Standard deviations (σ1) =…

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Sample mean (x̅1) = 42.8Sample mean (x̅2) = 40.9Sample size (n1) = 34Sample size (n2) = 41Standard…

Q: 4. Felician University uses hundreds of fluorescent light bulbs each year. The brand of bulb it…

A: The mean lifetime of current brand that it uses is of 900 hours. The mean and standard deviation of…

Q: Assume a researcher recruits 150 African American and Caucasian individuals taking warfarin to…

A: Given: n1 = 75 X1 = 6.1 S1 = 1.7 n2 = 75 X2 = 4.3 S2 = 0.9 Sp = 1.10 Formula Used: Sp =…

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: The objective of this question is to test the claim that there is a significant difference between…

Q: 35. A researcher is interested in whether teenagers have changed how much they watch TV nowadays.…

A: According to the information provided in question,Hypothesised mean  Population standard deviation…

Q: Suppose we have data on the ages of U.S. presidents. We also have ages for a sample of high school…

A:

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Solution

Q: 10. A consumer grouped tested a sample of 100 light bulbs. It found that the mean life expectance of…

A: Z-score: The z-score is a numerical measurement that describes a value of the relationship to the…

Q: Suppose​ 18% of​ movie-goers say that horror is their favorite movie genre. If a random sample of…

A: Obtain the mean number of movie-goers that prefer horror movie genre. The mean number of movie-goers…

Q: A survey was taken among the freshman at our college to find out how many hours a week they spent…

A: It is given that the mean and standard deviation are 30 and 10, respectively.

Q: In a sample of 57 high school teachers in Texas their average salary was found to be $44550 with a…

A:

Q: Hypothesis Tests - 2 samples x C Solved: One of the questions b Answered: The mean numbero x P…

A: Answer:- The independent t-test implies that the means of the two independent populations are…

Q: university in England and each student in a random sample of 38 female students from the same…

A: The following information has been provided: For Males : Sample Mean 1 (Xˉ1)(\bar X_1)= 282282…

Q: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

A:

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Answer:-

Q: Are low-fat diets or low-carb diets more effective for weight loss? This question was addressed by a…

A: Given that, for a low-carbohydrate diet n1=77, x1=4.7 kg, s1=7.2 kg For a low-fat diet, n2=79,…

Q: Suppose the average golfer drives the ball around 225.55 yards with a standard deviation of 8.82.…

A: Assume that the random variable x denotes the distance of balls drove by the golfer.

Q: Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2 and a…

A: From the given information X follows normal distribution with mean µ = 98.2 standard deviation σ =…

Q: Suppose that Sacramento workers have a mean commute of 17 minutes and commute times are normally…

A:

Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.36 and a…

A:

Q: Suppose the average golfer drives the ball around 259.1 yards with a standard deviation of 9.73.…

A: Solution

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Here we will conduct a 2 independent sample t-test to test the equality of the average number of…

Q: A researcher collects 25 data points that yield a mean of 8.164 and a standard deviation (based on N…

A:

Q: Suppose the amount of time teenagers spend watching TV is normally distributed. How should we…

A: It is given asPopulation mean = 20Sample mean = 15Sample size = 50Sample standard deviation = 6

Q: Suppose a population has a mean happiness score of 75 and a standard deviation of 15. Researcher A…

A:

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: From the provided information,

Q: Using the empirical rule, what percentage of American women have shoe sizes that are no more than…

A: It is given that Mean, μ = 8.33Standard deviation, σ = 1.5

Q: n Professor Krugman's economics course, the correlation between the students' total scores prior to…

A: Solution: Given information:  Let x= The pre‑exam totals  and  y= The final‑exam scores  r= 0.5…

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: Suppose that Randy is an analyst for the bicyling industry and wants to estimate the asking price of…

A: Given information- Sample size, n = 10 Sample mean, x-bar = $659.87 Sample standard deviation, s =…

Q: In Professor Krugman’s economics course, the correlation between the students’ total scores prior to…

A: a)   The equation of the line is y=143.2608+1.344x and it is obtained below:   From the given…

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Given data,n1=40x1=46.6σ1=4.6n2=45x2=48.8σ2=2.4Compute value of test statistic?

Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.47 and a…

A:

Q: Suppose a researcher wants to know if the average diastolic blood pressure in Irish-Americans is…

A: Solution

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Let be the group runners training for marathons be population 1 and       be the  individual…

Q: 56. A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it…

A: μ=50,000,n=28,x¯=46500,s=9800,σ=8000

Q: Do female college students spend more time than male college students watching TV? This was one of…

A: Let μMales be the mean time spent watching TV per day by males and μFemales be the mean time spent…

Q: Suppose that that the average BMI of the patients at Beth Israel Deaconness Medical Center is 30…

A:

Q: The General Social Survey polled a sample of 1056 adults in the year 2015, asking them how many…

A: From the provided information,

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Given: Sample size of males, n1 = 29 Sample size of females, n2 = 16 Standard deviation for males,…

Q: 4. Dougall compared the resting heart rate of average healthy citizens and soldiers suffering from…

A: Given Data : For Sample 1 x̄1 = 65.0 s1 = 6.0 n1 = 25 For Sample 2…