what is test statistics round to 2dp pvalue round to 4dp conclusion at alpha= 0.05
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what is test statistics round to 2dp
pvalue round to 4dp
conclusion at alpha= 0.05
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- A researcher used a sample of n = 50 individuals to determine whether there are any preferences between two new designs for a smartphone. If the data produce a chi-square statistic of X^2 = 6.00, what decision should the researcher make (indicate df and decisions with a=.05 and a =.01 by reporting critical values)The average amount of time it takes for couples to further communicate with each other after their first date has ended is 3.31 days. Is this average shorter for blind dates? A researcher interviewed 63 couples who had recently been on blind dates and found that they averaged 3.2 days to communicate with each other after the date was over. Their standard deviation was 0.501 days. What can be concluded at the the α = 0.10 level of significance? For this study, we should use The null and alternative hypotheses would be: H0: H1: The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is α Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The data suggest that the population mean is not significantly less than 3.31 at α = 0.10, so there is statistically insignificant evidence to conclude that the population mean time for couples who…When the Titanic sank, passenger survival rates were recorded along with additional information like their name, what class ticket they had, their age, and whether or not they had children. Some of these factors may predict whether or not a passenger was likely to survive the accident. The data set "Titanic survival.jasp" contains actual recorded data from the event. Using the variables "Class" and "Survived", conduct a Chi-Square Test for Independence, at alpha = 0.05, to see if a passengers ticket class (first, second, or third class) is significantly associated with their survival rates. Identify the correct value for df. A. 2 B. 1309 C. 4 D. 127
- Use dataset "HT_4143.xls" and conduct a two-sample t-test using Excel. You'd like to test the null hypothesis that the means of the two samples (column A and column B) are the same. The alternative hypothesis is that they are not the same. You have no reason to believe that the standard deviations of the two samples are equal. Test at the alpha = 0.10 level. After using Excel, what do you conclude? Are the means the same? Group of answer choices You reject the null hypothesis. Therefore, you conclude that the means of the two populations are different. You reject the null hypothesis. Therefore, you conclude that the means of the two populations are the same. You cannot reject the null hypothesis. Therefore, you conclude that the means of the two populations are different. You cannot reject the null hypothesis. Therefore, you conclude that the means of the two populations are the same. HT_ 4143.xls: X1 X299.73 98.6995.93 98.9494.92 96.63100.52 99.16101.28…Part 5 of 6 (e) Compute the mean uy. Round the answer to two decimal places. μx Part: 5 / 6 Part 6 of 6 ox = 1.04 (f) Compute the standard deviation oy. Round the answer to at least three decimal places. = Continue S X Submit As 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center |You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly less than 0.24. Thus you are performing a left-tailed test. Your sample data produce the test statistic z=−2.665z=-2.665. Find the p-value accurate to 4 decimal places.
- Are couples that live together before they get married less likely to end up divorced within five years of marriage compared to couples that live apart before they get married? 212 of the 696 couples from the study who lived together before they got married were divorced within five years of marriage. 167 of the 447 couples from the study who lived apart before they got married were divorced within five years of marriage. What can be concluded at the = 0.05 level of significance? The test statistic z = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.)The people who survived the titani are more from lower class department than upper class department. A sample of 200 people of upper class department who survived with a mean age of 28 and standard deviation of 1.6 and a sample of 505 people of lower class department who survived with a mean age of 35 and standard deviation of 1.2.Test the hypothesis wih 0.05 level of significance?15. According to the Pew Research Center, 68% of parents have taken away their teen's cellphone and internet privileges "digitally grounding" as punishment to enforce family rules. To verify this, an SRS of 500 teens age 13 to 17 resulted in 355 indicating that their parent(s) had taken away their phone and restricted internet privileges as punishment. Given alpha = 0.05 , is there evidence to support that 68% of teens have been "digitally grounded " by their parents ? Calculate the z-statistic? Round the answer to the nearest ten-thousandth (4 decimal places ).