A researcher is concerned with the effects of various courses that uses LMS and holding online exam with the academic standing. Exams results of students majoring in engineering that uses LMS are taken and analyzed. Is there a difference in the scores of students in various courses that uses LMS at 90% confidence level? Math 010 (Differential Calculus): Math 013 (Linear Algebra): Math 016 (Calculus 1): Math 017 (Calculus 2): 32 76 81 72 21 98 33 85 21 98 34 29 89 13 63 88 38 26 93 42 54 63 49 50 72 73 019 (EDA): T 56 29 13 78
Q: ignificance is referred to as "independent of observations". Explain this assumption.
A: The assumption of independence is used for T tests, in ANOVA tests, and in several other statistical…
Q: The test is used to test hypotheses associated with enumerated, categorized data. This test is used…
A: The objective is to determine the appropriate test, which involves enumerated categorized data.…
Q: Researchers in a statistics course at a Texas college wanted to investigate the optimism in…
A: Given that, The objective of the research study was to investigate the optimism in receiving a job…
Q: A health psychologist wants to determine if there is an average effect commonly called “the freshman…
A: Given : A health psychologist wants to determine if there is an average effect commonly called “the…
Q: Data from the National Health Interview Survey (NHIS): Group Sample Size Health Status Std. Error…
A: There are 2 categories of the people who have visited hospital recently and other doesn't visited…
Q: Researchers from a certain country were interested in how characteristics of Uie spI environment…
A:
Q: Which of these sounds like a situation where you would want to use an Independent-Measures ANOVA?…
A: concept: Independent ANOVA is used to compare means of more than two groups and then draw…
Q: have the same sample means but different confidence intervals. What are the implications for Dr.…
A: Dr. Richard's research study includes 3 fertilizers used for crop Fertilizer Mean, Crop Yield…
Q: Suppose that Dietitians recently recommended a 400 cal per meal and take her children of the age of…
A: The hypothesis test is a statistical method in which one using the sample data try to check the…
Q: Researchers wanted to determine if having a television (TV) in the bedroom is associated with…
A: This is an observational study because the researchers observe the behavior of the individuals in…
Q: Do sports drinks help prevent cramps in endurance sports? At the end of a marathon, officials will…
A: Observational study: In observational study, the individuals of the study are observed by the…
Q: a) State hypothesis, find the test statistic, and use any software for the P-value. Be sure to state…
A: The researchers want to check whether the data give good reasons to thinking that there is a…
Q: World Wide Web has a subsection designed to assess the "honesty" of the test-taker. You are…
A: Population mean=1148Sample mean=144Standard deviation =25 We have to finda...Null and Alternative…
Q: Inadequate exposure to outdoor lighting conditions may increase the risk of myopia in children. A…
A:
Q: It is required to construct a (1−?)100% confidence interval for the true population median, M using…
A: A sign test is non-parametric. In case of a sign test, we compare the medians, M, instead of the…
Q: A consumer advocacy group is doing a large study on car rental practices. Among other things, the…
A: The type II error is defined as accepting the null hypothesis when actually the alternative…
Q: "About 25 percent of college According to the website www.collegedrinkingprevention.gov, students…
A: sample size(n)=56Mean(x)=3.94standard deviation(s)=3.43confidence level=90%
Q: One personality test available on the World Wide Web has a subsection designed to assess the…
A: We have given that Mean(µ) = 140 Sample mean (x̅) = 134 Standard deviations (s) = 28
Q: Can the empirical rule be used on any population, why or why not?
A: Empirical Rule tells us that approximately every bit of data will be falling within three standard…
Q: Suppose that Dietitians recently recommended a 400 cal per meal and take her children of the age of…
A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…
Q: Many people consider their smart phone to be essential! Communication, news, Internet,…
A: Given that, mean(μ)=10.25 standard deviation(σ)=2.3
Q: One personality test available on the World Wide Web has a subsection designed to assess the…
A: Given data Hypothesized mean = 142 Population Standard deviation = 25 Sample size n = 100…
Q: A teen violence prevention program is providing mentorship to youth who report interpersonal…
A:
Q: Suppose an individual was studying temperature’s effect on the crime rate. The researcher looked at…
A: Note: Based on the computations using the technology, the calculations given here is correct.
Q: The null and alternative hypotheses would be: Select an answer p1 μ1 Select an answer ≠ =…
A: It is claimed that, freshmen psychology majors more likely to change their major before they…
Q: A student read that a 95% confidence interval for the mean age an American first drinks alcohol is…
A: Lower limit = 16 - 1.2 =14.8 Lower limit = 16 + 1.2 =17.2
Q: Many people consider their smart phone to be essential! Communication, news, Internet,…
A: Mean()=11.75standard deviation()=2.3
Q: What does Level of Confidence indicates?
A:
Q: Why do the study on the data variability is called as the complementary to the study on central…
A: Central tendency is the tendency of the quantitative data set to cluster around the some central…
Q: PLEASE DON'T UPLOAD A PICTURE OF THE ANSWER. PLEASE TYPE IT SO I CAN COPY AND PASTE IT INTO MY…
A: Chi-Squared Test for Independence : Hypothesis : H0 : There is a no relationship between gender and…
Q: (b) What is the sample mean in hours per week? xhours per week What is the test statistic? (Round…
A: The data shows the 40 married couples hours per week the husband spends on child care.
Q: total years of education and an indicator variable for female (1 if yes, 0 otherwise). SUMMARY…
A: As due to the honor-code we are authorized to answer only 3 subparts for each question and that you…
Q: Assuming there are 150 students in our statistics class, 20 of you have received 4 hours of study…
A: Given Data: Sample mean=75 Population mean=72 Population standard deviation=6 n=20 For one sample…
Q: A comprehensive study conducted by the National Institute of Child Health and Human Development…
A: It is given that a study conducted by National Institute of child health and human development.
Q: I need help with creating a confidence interval using gender as a healthcare variable
A: Here, we can can use the sample proportions relating to a particular gender type to find the effect…
Q: iew 8.2 of your te ect Help tab below fidence interval ca watch Excel videa ew 8.3 of your text ect…
A: In above scenario we have to deal with confidence interval for population proportion. The formula…
Q: recently recommended a 400 cal per meal and take her children of the age of the data set. To see if…
A: Claim : groups means are different from 400 calories. For the given data : For Sample 1 x̄1…
Q: Carbon dioxide (Chapter 20]. Because plants use CO; to fuel photosynthesis, more CO; may cause trees…
A: Test: The investigator is specifically interested to test whether giving more CO2 causes trees to…
Q: If a research study in biomedical field found a moderate negative and statistically significant…
A: The correlation helps in understanding the relationship between the 2 variables.
Q: Prof. Lopez wants to know whether type of the exam formats will impact on student’s final exam by…
A: Repeated measures t-test is a design in which a single sample of participants is measured twice on…
Q: please answer all parts
A: Understanding the ProblemWe're comparing two proportions:The proportion of U.S. men who can identify…
Q: In 2013 students from a Statistics class at FSEV UK were asked to survey their friends who were…
A: In this question survey of interest area in between 15-30 years We need to describe p value…
Q: Why are confidence intervals important and what do they mean to a study?
A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…
Q: A researcher gathered a sample of participants who volunteered for a studying of phobias. She…
A: A researcher gathered a sample of participants who volunteered for a studying of phobias. She…
Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…
A:
Q: How do the Type I and Type II error rates of one-tailed and two-tailed tests differ?
A: Type I error: A type I error occurs when one rejects the null hypothesis when it is true. The…
Step by step
Solved in 2 steps with 4 images
- This research was conducted with Korean adolescents in the Los Angeles area. Would you be willing to generalize the results of this study to Korean adolescents who live in other regions of the country? Why or why not.A pollof 2000 randomly selected students in grades 6 through 8 was conducted and found that 48% enjoy playing sports. Is the 48% result a statistic or a parameter?Many people consider their smart phone to be essential! Communication, news, Internet, entertainment, photos, and just keeping current are all conveniently possible with a smart phone. However, the battery better be charged or the phone is useless. Battery life of course depends on the frequency, duration, and type of use. One study involving heavy use of the phones showed the mean of the battery life to be 11.25 hours with a standard deviation of 3.3 hours. Then the battery needs to be recharged. Assume the battery life between charges is normally distributed. (a) Find the probability that with heavy use, the battery life exceeds 12 hours. (Round your answer to four decimal places.)(b) You are planning your recharging schedule so that the probability your phone will die is no more than 5%. After how many hours should you plan to recharge your phone? (Round your answer to the nearest tenth of an hour.) hours
- Researchers were interested in assessing whether stress levels are different at the beginning of the semester compared to finals week. To test this, stress was measured in 5 students at the start of the semester and then again at the end of the semester during finals week. Participant Stress 1 Stress 2 Difference Score (Di) (Di - Mdiff)2 1 22 22 0 2 32 34 -2 3 24 25 -1 4 28 30 -2 5 26 29 -3 What is the observed test statistic (i.e., tobs)? Round to 2 decimal places.The U.S. Golf Association provides a number of services for its members. One of these is the evaluation of golf equipment to make sure that the equipment satisfies the rules of golf. For example, they regularly test the golf balls made by the various companies that sell balls in the United States. Recently they undertook a study of two brands of golf balls with the objective to see whether there is a difference in the mean distance that the two golf ball brands will fly off the tee. To conduct the test, the U.S.G.A. uses a robot named "ron Byron," which swings the club at the same speed and with the same swing pattern each time it is used. The following data reflect sample data for a random sample of balls of each brand.One personality test available on the World Wide Web has a subsection designed to assess the "honesty" of the test-taker. You are interested in the mean score, μ , among the general population on this subsection. The website reports that μ is 145, but you have good reason to believe that μ is less than 145. You decide to do a statistical test. You choose a random sample of people and have them take the personality test. You find that their mean score on the subsection is 139 and that the standard deviation of their scores is 28. Based on this information, complete the parts below. (a) What are the null hypothesis H0 and the alternative hypothesis H1that should be used for the test? H0: H1: (b) Suppose that you decide to reject the null hypothesis. What sort of error might you be making? ▼(Choose one) (c) Suppose the true mean score among the general population on the subsection is 136. Fill in the blanks to describe a Type II error. A Type II error…
- please complete the blank problem and or ones with a red x next to it not ones with a green check next to pleaseYou are hanging out with your friend on a Saturday night and they decide they want to watch the Ultimate Fighting Championship Event happening that night. As you are watching the mixed martial arts fights you notice that males and females fight separately. You talk to your friend about this and find out that it is due to "safety and sizing" that the sexes do not fight each other. You (being a statistics enthusiast) decide to compare skills between the sexes to see if there is a true difference between the fighters' ability. You take the top 10 male fighters and the top 10 female fighters win/loss ratios (yes these I actually looked up): Male Fighters Female Fighters 19 7.3 23 2.8 21 4.2 2.8 10.5 2.4 2.8 3.2 15 4 5.3 3.9 26 3.8 4 5 3.88. Compute 1. Sample statistic 2. Test statistic 1. Statistical results 2. Contextual results 9. Describe
- For part i can you describe that sample using the summaries, in part ii describe if the normality is reasonable, and part iii interpret the confidence interval?I chose Option 1 for this week’s discussion post. I want to estimate the population mean number of times adults between the ages of 30 and 45 went to the grocery store in the last week. I spoke with 12 adults and asked them how many times they went to the grocery store in the last week. The results were 0, 2, 2, 7, 5, 1, 0, 3, 1, 1, 4, and 3. Now calculate a 95% confidence interval for the population mean. (Round to three decimal places)One personality test available on the World Wide Web has a subsection designed to assess the "honesty" of the test-taker. You are interested in the mean score, μ , among the general population on this subsection. The website reports that μ is 145 , but you have good reason to believe that μ is less than 145 . You decide to do a statistical test. You choose a random sample of people and have them take the personality test. You find that their mean score on the subsection is 140 and that the standard deviation of their scores is 22 . Based on this information, complete the parts below. (a) What are the null hypothesis H0 and the alternative hypothesis H1 that should be used for the test? H0: H1: (b) Suppose that you decide not to reject the null hypothesis. What sort of error might you be making? ▼(Choose one) (c) Suppose the true mean score among the general population on the subsection is 137 . Fill in the blanks to describe…