A researcher wants to see if there is a difference in APGAR scores of newborns depending on whether the mother smoked during pregnancy or not. She collects data and analyzes the results using SPSS. What is your conclusion?   Question 22 options:   There is no evidence to suggest a difference.   There is a difference in newborns' APGAR score based on whether the mother smoked or not.   Newborns whose mothers didn't smoke have higher APGAR score than newborns whose mother did smoke.    Newborns whose mothers didn't smoke have lower APGAR score than newborns whose mother did smoke.

Table 1 summarizes the demographic and baseline data. Since two independent groups were included, the baseline data between these two groups were compared and p values were included in this table. Please tell which specific statistical test was used for the comparison between age and sex. Your answer should be as specific as possible. For example, was the test two-sided or one-sided? Was the test for paired samples or not?

Previous question was INCORRECT. Please read this carefully :) Measuring the Effect of Story SpoilersA story spoiler gives away the ending early. Does having a story spoiled in this way diminish suspense and hurt enjoyment? A study1 investigated this question. For twelve different short stories, the study’s authors created a second version in which a spoiler paragraph at the beginning discussed the story and revealed the outcome. Each version of the twelve stories was read by at least 30 people and rated on a 1 to 10 scale to create an overall rating for the story, with higher ratings indicating greater enjoyment of the story. The ratings are given in Table 1 and stored in StorySpoilers. Stories 1 to 4 were ironic twist stories, stories 5 to 8 were mysteries, and stories 9 to 12 were literary stories. Here we measure the size of the effect on mean rating. Story 1 2 3 4 5 6 7 8 9 10 11 12 With spoiler 4.7 5.1 7.9 7.0 7.1 7.2 7.1 7.2 4.8 5.2 4.6 6.7 Original 3.8 4.9 7.4 7.1 6.2…

In order to evaluate the effects of stress on the development of stomach ulcers, three separate groups of monkeys were trained to avoid shock by performing a simple avoidance task, a complex avoidance task or a very complex avoidance task.  The more complex the task, the less successful the monkeys were at avoiding electric shock.  After several weeks of this, the number of stomach ulcers the monkeys had in each group were counted. Which statistical test should be used to compare ulcers across the three groups? Select one: a. One-way between subjects ANOVA b. One-way repeated measures ANOVA c. Two-way between subjects ANOVA d. None of these options

What type of statistical test did the researcher use to analyze her data? How many effects were tested in this test? Explain

Solution 1. Ho: The average life span today is not greater than 72 years. Ha: The average life span today is greater than 72 years. 0.05 2. 3. t-test (one-tailed) 4. df=n-1 df=100-1=99 t₁ = 1.66 Tabular value 5. Computation using the formula for sample mean compared with population mean tc = Substitute the given values in the formula tc (x-μ)√n S = F = 69 = 72 μ n = 100 S = 8.9 NOW (69-72)√/100 8.9 tc = -3.37 6. Decision: Since t computed value of -3.37 is less than tabular value of 1.66. Therefore, we reject our null hypothesis (Ho). 7. Formulate conclusion: The average life span today is greater than 72 years.

An article published in the “American Journal of Public Health” describes the results of a health survey administered to 119 male convicts, 50 years of age or older, residing in a state social rehabilitation center. It was found that 21.6% of them claimed to have a history of venereal diseases. Based on these findings, we wish to evaluate whether more than 15% of this population has a history of venereal diseases. After evaluating the information, what would be the conclusion? A. In the population of male convicts aged 50 years or older, residing in the state social rehabilitation center, more than 15% have a history of venereal diseases. B. In the population of male convicts aged 50 years or older, residing in the state social rehabilitation center, it is not possible to say that more than 15% have a history of venereal diseases. C. In the population of male convicts aged 50 years or older, residing in the state social rehabilitation center, on average more or less 21.6% have a…

Show the difference between two approaches to significance testing?

A national study report indicated that 20,5% of Americans were identified as having medical bill financial issues. What if a news organization randomly sampled 400 Americans from 10 cities and found that 95 reported having such difficulty. A test was done to investigate whether the problem is MORE SEVERE among these cities. What is the value of the TEST STATISTIC (T.S.)? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a -0.787 1.610 2.479 d 0.787

Give an example of a study for which the one sample z-test would the appropriate test statistic to use.