The researchers hypothesised that people who receive an audiovisual presentation will have a different mean level of recall of ad information as those who receive only the visual aspects of the ad. What significance test should the researchers use for testing their hypothesis?

Q: When looking to understand the Z score what does it actually mean in simple terms in comparison to…

A: The value of the z-score tells you how many standard deviations you are away from the mean. If a…

Q: when is the significance level determined

A: The significance level defines that the probability of rejecting the null hypothesis when it is…

Q: A polling company contends that an agent conducts a mean of 53 in-depth home surveys every week. A…

A:

Q: Does statistically different indicate substantially different? Why or why not?

A: No, statistically different does not indicate substantially different. These two are different…

Q: What statistical test would you use to compare three different groups on some dependent variable?

A: Given : What statistical test would you use to compare three different groups on some dependent…

Q: Listed below are "likability" ratings made by participants in a speed dating session. Use a 0.05…

A: It is required to test whether the male ratings are less than female ratings. The difference between…

Q: The Construction Labor Research Council lists a number of construction labour jobs that seem to pay…

A: We have to find,  Is there a significant difference in mean hourly wages for these three jobs? If…

Q: To see how much difference time of day made on the speed at which he could download files, a college…

A:

Q: A researcher wanted to know if there is an association between exercise and sleep for the population…

A:

Q: A group of 54 college students from a certain liberal arts college were randomly sampled and asked…

A: The sample size n is 54.

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: What does The level of significance spotlights?

A: Level of significance is used in hypothesis testing. It is defined as the Type I error. The symbol…

Q: At the 5% significance level, which predictor variable(s) is(are) individually significant? Only X1-

A: For predictor variable x1: From the output, the P-value for x1 is 0.0286. The hypothesis is, Null…

Q: Construct a histogram that represents the following data regarding the score ranges for the…

A: The data is: Class Frequency 14 – 17 4 18 – 21 9 22 – 25 5 26 – 29 5…

Q: Is there a relationship between scores on the combat exposure scale and Davidson trauma scale in a…

A: One should first know the definitions of these scales before proceeding with the answer. Combat…

Q: Test the claim that the proportion of men who own cats is larger than 50% at the .025 significance…

A: Given that  Claim :  The proportion of men who owns cats is larger than 50%  Hypothesized proportion…

Q: If we have a data set containing the age and marital status of large group of individuals and we ask…

A: Independent samples t test: The independent samples t-test can be used to examine a possible…

Q: What is the observed significance level for this test?

A: here given , n= 50  sample mean  =  19.4  sample standard deviation  =  3.1

Q: at a 0.10 significance level?

A: No treatment  Fertilizer  Irrigation  Fertilizer and irrigation  1.212 0.939 0.069 0.852…

Q: A researcher studying psychological well-being between those with depression, anxiety, or mood…

A: Given Information- Number of individuals for each type of psychological well-being are Depression =…

Q: Does the data from the sample support his claim at a significance level of 0.05?

A: It is given that Sample size n = 60 Sample mean M = 3012 Sample SD s = 112 Level of significance =…

Q: Test the claim that the mean GPA of night students is significantly different than 2.7 at the 0.2…

A: claim : we wants to test that mean GPA of night student is different than 2.7 given information:…

Q: Discuss the measures of central tendencies and the situations in which one is a better…

A: The 3 most common measures of central tendency are the mean, median and mode. 1) Mean: Or we can…

Q: α is the observed level of significance whereas the p-value is the preset level of significance.…

A: We have given that, α is the observed level of significance whereas the P- value is the preset level…

Q: a researcher peformed the Mann-Whitney test and found a significant difference between psychologists…

A: Since, the population standard deviation known. Therefore, the value of z should be taken from…

Q: Research subjects were followed from adolescence to adulthood, and all the people in the sample were…

A: Given information: The data of relationship status and obesity are given. Significance levelα=0.05.…

Q: Use a 0.05 significance level to test the claim that cans of regular Coke and diet Coke have the…

A: It is given that the sample statistics for the regular coke and diet coke.

Q: At a level of significance of 0.01, can the null hypothesis be rejected? Show the complete…

A:

Q: Use the stat crunch data and determine if the mean quiz score is higher for those to take the quiz…

A: It is given that, the sample size n is 10.

Q: Researchers are interested in the effect of a high-protein diet on the performance of undergraduates…

A: In hypothesis, we conclude the result for our two hypotheses, null hypothesis and alternate…

Q: What is the significance of a z-score?

A: The value of z score tells that how many standard deviations the data is spread away from mean. The…

Q: If a treatment is expected to decrease scores on a variable for which the mean is expecte

A: From the given information, If a treatment is expected to decrease scores on a variable. The mean is…

Q: You are planning a cross-sectional study of the impact of chocolate milk shake drinking on obesity…

A: Sensitivity and Specificity: While measuring the effect of any given factor on a particular disease,…

Q: Assume you are using a significance level of a = 0.05| to test the

A: As given,  α = 0.05 We have to test the claim: µ < 20  Sample size ( n ) = 33 µ = 14 and σ = 8…

Q: A researcher is using a repeated-measures design to test for mean differences among four treatment…

A: From the provided information, Number of treatments (k) = 4 Each study consist of 18 score in each…

Q: Can you think of any flaws in the One-Sample Z-Test for Mean?

A: Introduction: Suppose the true, unknown mean of a population of interest is μ.

Q: A sample survey by Comcast asked a random sample of customers about use of the Internet and about…

A: The test is to check whether there is a relationship between Internet use and community type or not.…

Q: Test the claim that the proportion of men who own cats is significantly different than the…

A: Given that Claim : Proportion of men who own cats is significantly different than the proportion…

Q: A study is conducted to investigate whether customer satisfaction is greater among computer…

A: Stratified sampling: In stratified sampling, the entire population is divided into homogeneous…

Q: The Tampa Bay (Florida) Area Chamber of Commerce wanted to know whether the mean weekly salary of…

A: There are two independent samples which follows normal distribution. We have to test whether the…

Q: She made 10

A: Given that A typical 12-ounces serving of beer is said to be 150 calories. The above statement…

Q: child and their family were interviewed to assess whether there might be an association between…

A: In case-control studies, the subjects of the study are generally divided into two groups, the “cases…

Q: The Behavioral Risk Factor Surveillance System is an ongoing health survey system that tracks health…

A: The data is illustrated in the following way- Age-Group (years) Yes No Total 18-34 231…

Q: claim that the mean IQ score of people With low blood lead levels is higher than the mean IQ score…

A: Step 1: The claim that the mean IQ score of people with low blood lead levels is higher than mean IQ…

Q: elect a significance level α and reject the null-hypothesis if the p-value is less than α. Explain,…

A: The given R output is,

Q: Traditional statistics (means, variances, and hypothesis tests) are not used to evaluate the results…

A: The traditional statistics are used to evaluate the result means we use the critical values to make…

Q: A polling company contends that an agent conducts a mean of 53 in-depth home surveys every week. A…

A: Correct option is (e)

Q: It states that there is significant difference between the observed and expected data.

A: Alternative Hypothesis

Q: The area of inferential statistics called hypothesis testing is a decision-making process for…

A: Introduction: Inferential statistics is the branch of statistics, that is involved in making…