Researchers wanted to test the happiness score across 3 time-points   Happiness 1 Happiness 2 Happiness  3 22 38 42 31 40 50 20 32 43 23 33 37     find the df happpiness,  df subjects, df error and df total

Q: In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the…

A: The hypothesis expresses a viewpoint on a population parameter.A null hypothesis is a statistical…

Q: If a study does not find any statistically significant relationship between the number of pet visits…

A: The variables under the study are: The number of pet visits. Satisfaction with the pet therapy…

Q: A DNP student wants to evaluate the change in knowledge scores of a group of cardiac patients after…

A: In given problem, a DNP student obtains a pretest at the beginning of class and immediately after…

Q: Question Help ▼ A certain drug can be used to reduce the acid produced by the body and heal damage…

A: Solution: Given information: n= 239 Sample size of patients  x= 217 patients suffer from acid reflux…

Q: What is an “average” z-score? Explain your answer?

A: A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of…

Q: Data from a two-way table with 6 columns and 6 rows has x² = 40.65. Find the $P$-value for the…

A:

Q: Over the past year, the vice president of human resources at a large medical center conducted a…

A: First we have to construct below rank table for the given data, Before After Difference…

Q: There (Choose one) venough evidence to conclude that the mean FICO score is more than the cutoff of…

A:

Q: A recent study evaluated how addicted teenagers become to nicotine once they start smoking. The…

A: n1=79 n2=72 X1-bar=5.4 X1-bar=4.7 S1=3.3 S2=3.2

Q: Explain how can we find the corresponding z-score of an area and a percentile.

A:

Q: hi i need help to calculate this statistics on manual calculations. this is the 5 question, A study…

A: hi i need help to calculate this statistics on manual calculations. this is the 5 question, A study…

Q: Help with F- Statistic and P-Value please!

A: The mean for sample means is, The sum of square for treatments is, The sum of square for error is,…

Q: What is Percentile Rank of an Observation?

A: Percentiles: If the elements in the data set are arranged in ascending order of magnitude, then the…

Q: a. What is the null and alternative hypothesis? b. What is the test statistic to be used, the…

A: (a) State the hypotheses. here, the claim of the test is that there is evidence that two sets of…

Q: Hi Expert, I need help. Thanks A graduate student is interested in how viewing different kinds of…

A: The null and alternative hypotheses as: H0 : μD = 0 Ha : μD ≠ 0   Mean difference (MDD) -0.9…

Q: 84 Students Who Took The Achievement Test Last Oct. 2020 If the mean is 88, S = 2.50 How Many…

A: Answer - Given, Sample size n = 84 and the mean is μ = 88, S = 2.50                 How Many…

Q: You developed a way to measure anger people. Test the claim that the mean score of anger for younger…

A:

Q: Researchers conducted a study to understand the effect of gender on statistics anxiety. They believe…

A: Given, we have two samples males and females.

Q: Question Help In a study, researchers wanted to measure the effect of alcohol on the hippocampal…

A: Solution We have given that  H0: μ = 9.02 H1 : μ < 9.02 So it is left tailed t test.  And  test…

Q: You want to compare the performance on a learning task of a group of 20 subjects who have been given…

A: Introduction: Denote μ as the true average number of correct responses by those who under Drug P.…

Q: Aspirin prevents blood from clotting and helps prevent strokes. The Second European Stroke…

A: Given ,  Aspirin alone :  Sample size = n1 = 200  Number of strokes = x1= 60 Sample proportion = p^1…

Q: Task-3. What are statistical measures of Frequency and Central Tendency? Support your answer with a…

A: The objective is to describe the statistical measures of frequency and Central tendency with…

Q: Why are t statistics more variable than z -scores?

A: t-statistics uses sample variance instead of population variance.   t statistics has both s and x̅.

Q: ANOVA A student of mine was interested in the effect of emotion on memory. She asked assigned…

A: Find SSwithin=? For the given ANOVA

Q: z-score that is greater

A: we can assume it to be standard normal distribution with mean = 0 standard deviation = 1

Q: Describe the formula used to calculate a z-score?

A: The formula used to calculate z-score is

Q: A pharmaceutical scientist is testing a drug if it has any effect on helping students improve their…

A:

Q: SAT scores have been critiqued. Here is the data from a study that looked at gender and…

A: Obtain the missing values in the ANOVA table. The missing values in the ANOVA table are obtained…

Q: use pic to answer question, anova one way test 1. How would you interpret the main effect of time?…

A:

Q: Education influences attitude and lifestyle. Differences in education are a big factor in the…

A: There are two independent samples which are 65 and older, 25-34. Both samples come from population…

Q: which section, verbal or quantitative, was the student's performance better? Round your answers to…

A: It is given that  For verbal GRE score: M = 152 s = 7   For quantitative score: M = 149 s = 7

Q: A histological test for cancer has sensitivity, specificity, positive predictivity, and negative…

A: To find, Which of the four indicators would you use to reassure a patient that the positive result…

Q: Empathy among police officers influences how they interact with citizens and the likelihood that…

A: To identify: If you were going to make gender comparisons like this, which option would be the…

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: In spss, what test can you do to compare the score of variables?

A: As per the question we have to compare the score of variables if we have 2 independent samples, we…

Q: how do i calculate a z score or find the X-Value and determine if a score is usual or unusual

A: A z-score measures exactly how many standard deviations above or below the mean a data point is.

Q: In a study, researchers wanted to measure the effect of alcohol on the hippocampal region, the…

A: Given,   Sample size = 12 Sample mean = 8.17 Sample standard deviation = 0.8 Population mean = 9.02…

Q: Thanks. Why is Kathy's score considered better-is it because it is a posituve score? What does the Z…

A: Bobby' Z- score ( wasZ=Bobby's score  of 1080 was between 1 and 2 standard deviation above the mean…

Q: A teacher wants to know if there is a significant difference in reading ability between a sample of…

A: An appropriate choice of the test is to be adopted in order to test the claim of difference in the…