A study published by Babcock and Marks (2010) showed that the average full-time U.S. college student studied for μ = 14 hours per week (SD = 4.8 hours per week) in 2005. We want to know if this average has changed in the past 15 years. In other words, we are going to do a study in which we try to determine whether there has been an impact of the passage of time on the amount of time college students spend studying. We selected a sample of n = 64 of today’s college students and find that they spent an average of M = 12.5 hours per week studying. Does this sample indicate a significant change in the number of hours spent studying? Use a two-tailed test (this means non-directional hypothesis) with α = .05.

Q: smell if exposed to the chemical repeatedly. Does this change in sensitivity happen in the nose or…

A: Null Hypothesis Alternative Hypothesis Here,  indicates the proportion of participants whose…

Q: Brink studied the effect of postural change on cardiovascular reactivity for a sample of healthy…

A:

Q: - Consider again the data describing the relationship between exercise and glucose levels described…

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

Q: As a data collection specialist at the Centers for Disease Control and Prevention. you have been…

A: The given data is as follows:The liver cancer rates per 100,000 males among cigarette smokers versus…

Q: Question 2 At the end of 2020, the mean age of the U.S. population was estimated to be 38.5 years…

A: The objective of this question is to determine whether the mean age of the population of IAT…

Q: ts or Female Students? Information on a sample of 362 college students is collected. The complete…

A: given: n=362 out of 193 males 27 smoke and out of 169 females 16 are smokers

Q: Several years ago, researchers conducted a study to determine whether the "accepted" value for…

A: The provided information is as follows:The sample mean is .The sample standard deviation is .The…

Q: ease see below. I need help with both questions please and thank you. Question 1: Researchers…

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

Q: Hazel and Luna are in different sections of MTH 134, They both took Test 1 and their instructors…

A: We need to find the z score of the both in order to compare there performance Formula for z score is…

Q: A study is conducted to test a new drug claimed to reduce diastolic blood pressure in adults with a…

A: It is given that a study is conducted to test a new drug and it is interested that whether the drug…

Q: The toco toucan, the largest member of the toucan family, possesses the largest beak relative to…

A: The regression analysis is conducted here by using EXCEL. The software procedure is given…

Q: According to a 2006 survey conducted by the Center for Disease Control and Prevention (CDC), birth…

A: Chi square is used to determine whether the variables are independent or not. Chi square test are of…

Q: Infant Mortality Rates. In the article “Children’s Environmental Index,” the ZPG (September, 1997)…

A: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have solved…

Q: Reduced heart rate variability (HRV) is known to be a predictor of mortality after a heart attack.…

A: We have given that  Sample sizes n1= 22    , n2= 80    Sample means X̄1= 875      , X̄2=  800…

Q: Is Your Nose Getting Bigger?Next time you see an elderly man, check out his nose and ears! While…

A: a)Null and alternative hypothesisA null hypothesis is a statement regarding the population value…

Q: Please use the following information to answer questions 23-25: Recent research suggests that…

A: Null and alternative hypotheses :  Null hypothesis H0: µ = 4.1 hrs  : Children with ADHD watch an…

Q: This is a question on my homework. Did I compute the prevalence of hypertension at baseline and at 2…

A: Here you find out prevalance of hypetension at baseline = 45/252 = 0.1786 approximatley 18%.You find…

Q: Submit a document with the answer to the following question along with an Excel workbook with the…

A: The makers of the Oral-B 3D toothbrush claim that using their brush will "significantly combat tooth…

Q: A biologist wished to study the effects of ethanol on sleep time. A sample of 80 rats, matched for…

A: We give 0 - 4 g/kg ethanol to a group of rats.  The REM sleep time , with increase in amount of…

Q: Question 2

A: The hypotheses to be tested are:H0: μ = 28.2.H0: μ > 28.2.Calculation of test statistic:Here, the…

Q: Question 39. To do the above test of hypothesis, which one of the following will be the appropriate…

A: Let p be the population proportion of its batteries that are defective.Given that,Population…

Q: How Much Older Are Husbands? Exercise 2.213 introduces a dataset giving the ages of the two people…

A: 2.213

Q: It is common wisdom that death of a spouse can lead to health deterioration of the partner left…

A: From the provided data, the summarized contingency table is obtained as follows:Level of…

Q: Assuming the lowest decile of men receive an average of $800/month in Social Security, while the…

A: Introduction:Observe the “Born in 1940” curve in the given graph. The average of the lowest decile,…

Q: Dr. Payne is studying the number of davs patients stav in Armadillo Community Hospital after a…

A: Introduction: Denote the random variable X as the number of days of hospital stay after the surgical…