What can be concluded at the αα = 0.05 level of significance?

Q: Two types of valves are being tested to determine if there is a difference in pressure tolerances.…

A: The question is about hypo. testing Given : Total no. of sample under Valve A: n1= 100 No. valves…

Q: If I have a sample of 25 people what is my T-threshold for a two-tail test and an alpha of 0.05…

A: Given: Sample size (n)=25 Level of significance α=0.05%

Q: What is the conclusion for this test? The P-value is the significance level a, so the null…

A: Given Z =9.13, pvalue=0.000

Q: What is the critical value for a one sided t-test with an alpha = .1, and degrees of freedom = 12?

A: Solution: From the given information, α=0.1 and degrees of freedom is 12. The critical value can be…

Q: To test the classic debate about which tastes better, Coke or Pepsi, we sampled 252 children and…

A: Coke choosen by 169 Pepsi choose by 83

Q: The mean cost of the ingredients of a chicken parmesan meal bought at the grocery store is $15.…

A: Solution:

Q: A clinical trial is conducted comparing a new pain reliever for arthritis to a placebo. Participants…

A: Given Information: New Medication: Sample size n1=44+76=120 x1=44 Placebo: n2=21+99=120 x2=21…

Q: If you are making 4 comparisons between means, then based on the Bonferroni correction, you should…

A: Introduction: While performing an analysis, a researcher may often need to make multiple comparisons…

Q: What would you conclude based on an α=0.05 ​level?   We reject   the null hypothesis and do not…

A: From the previous information, it is known that the p-value is  0.9857. And level of significance is…

Q: A taxi company has been using Brand A tires, and the distribution of kilometers to wear-out has been…

A:

Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…

A: Given data : x1= 356.0 n1= 579 x2= 322.0 n2= 597 significance level,…

Q: A new drug for pain relief is being tested within a given palliative care population. The new drug…

A: The null and alternative hypothesis is given below: Null hypothesis: H0: There is no significant…

Q: From previous studies, it is concluded that 30% of workers indicate that they are mildly satisfied…

A: Note : According to our guidelines we are solving only first three sub-parts of a question and the…

Q: As a researcher for the EPA, you have been asked to determine if the air quality in the United…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: In a clinical trial, 27 out of 875 patients taking a prescription drug daily complained of flulike…

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Q: In a clinical trial, 27 out of 845 patients taking a prescription drug daily complained of fulike…

A: A hypothesis test can be used to make conclusions about the population proportions. For this test…

Q: A new study on the widely used antidepressant AD+ has been published. The study has information on…

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Q: A humane society claims that less than 71% of households in a certain country own a pet. In a random…

A: From the given information, the sample size (n) is 400, hypothesized proportion p0 is 0.71 and…

Q: Find the significance level of a one tailed test if the critical value of t is 2.264 and the sample…

A: The hypothesis test, will contain two hypotheses: null hypothesis and alternate hypothesis. The…

Q: When the P - value is equal to the alpha level, the null hypothesis should be accepted.

A: P-value is the probability value which is derived from test statistic and it is useful to decide…

Q: A researcher who is interested in examining the eating behavior of adolescents records the number of…

A: for this study: statistics of interest would be " sample mean number of calories consumed as sample…

Q: In a random sample of 340 cars driven at low altitudes, 46 of them exceeded a standard of 10 grams…

A: Hypotheses: Let p1 denote the proportion of high-altitude vehicles exceeding the standard and p2…

Q: In a group of 55 examinees taking the 50-item test, Rachel obtained a score of 38. This implies that…

A:

Q: What is the critical value for a two sided t-test with an alpha = .05, and degrees of freedom = 60?

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Q: The appearance of leaf pigment glands in the seedling stage of cotton plants is genetically…

A:

Q: What is the critical value for a two sided t-test with an alpha = .02, and degrees of freedom = 29?

A: Given, alpha = .02 degrees of freedom = 29 and mentioned that 2 sided t-test, Therefore from t-table…

Q: A dlinical trial is conducted comparing a new pair reliever for arthritis to a placebo. Participants…

A:

Q: A random sample of 170 donations at a certain blood bank reveals that 84 were Type A blood. Does…

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Q: A random sample of residents from various income brackets were asked their opinion on tax reforn for…

A: b.   *:   Total for Low:   *=26+60+34=120   **:   Expected frequency of Against and High:…

Q: A new drug for pain relief is being tested within a given palliative care population. The new drug…

A:

Q: a. What is the degree of freedom and critical value for the test (alpha=0.05)?  b. If the…

A: a.   In this case, it is needed to check whether the response is independent of gender.

Q: We found no difference on the reported self-esteem level between female participants (M=5.39, SD =…

A: As per our guidelines, we are allowed to answer first three sub-pats only. Thanks   What was the…

Q: You are asked to evaluate the effect of a fast acting blood pressur- medication. You take a random…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: It is known that for right-handed people, the dominant (right) hand tends to be stronger. For…

A: The calculated test statistics t-score is equal to 1.80. The sample size is n=15.  Then, the degree…

Q: To combat antibiotic resistance, the Quality Improvement Consortium recommends a throat swab to…

A: Note: Hey there! Thank you for the question. As you have provided a question with multiple…

Q: Assume the patients are asked to rate the pain on a scale from 1 to 10, and the data presented below…

A: Critical value=2 at n1=n2=5 at 0.05 significance level. Reject H0 if U<=2. We fail to reject H0 ,…

Q: 20% of all college students volunteer their time. Is the percentage of college students who are…

A: It is given that the number of students who volunteered their time (x) is 61 and the sample of…

Q: A new drug for pain relief is being tested within a given palliative care population. The new drug…

A: The given data is as follows:

Q: Problem in photo

A: Solution:The hypotheses are stated below:Null hypothesis:There is no association between alcohol…

Q: Is the proportion of wildfires caused by humans in the south different from the proportion of…

A: Given Information: 394 of the 533 randomly selected wildfires looked at in the south were caused by…

Q: Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining…

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Q: When is a post-hoc test used? (Select all that apply.) a. when you decide to do a within-subjects…

A: Post-hoc test :

Q: Can I use  CRONBACH’S ALPHA in testing the reliability of the device? How?

A: CRONBACH's Alpha:  It is a measure of internal consistency. Cronbach alpha can be considered as a…

Q: A random sample of 100 male employees showed that 42 are working from home while a random sample of…

A: Solution: Given information: n1=100 Sample size of male employeesn2=100 Sample size of female…

Q: A clinical trial is conducted to compare a new pain re- liever for arthritis to a placebo.…

A:

Q: The effectiveness of surgery for weight loss reported here found that "The surgery was associated…

A: The difference between initial weight and the final weight is determined for each subjects.

Q: One of the early studies linking smoking and lung cancer compared patients hospitalized with lung…

A: P-value is used for making decisions about the hypothesis test regarding whether to accept or reject…

Q: A randomized prospective study is conducted to estimate the association between taking a drug and…

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Q: In experimental situations, care is taken to control for as many factors as possible which might…

A: Spearman rank correlation :   The non parametric counterpart of the Pearson product-moment…

Q: Suppose an experiment finds that people taking a new herbal remedy get fewer colds than people…

A: Given an experiment that people taking a new herbal remedy get fewer colds than people taking a…