The assumption underlying chi square with k=12 categories is that 8 or more categories must have Ei >=5 in order for the test results to be valid. O True False What is the decision regarding the differences between the observed and expected frequencies if the critical value chi-square is 11.07 and the computed chi-square value is 6.2? O Too close; reserve judgment. O Reject Ho; observed frequency is different than the expected. O Do not reject Ho; observed is not different than the expected distribution O Do not reject Ho: TNOETS observed and expected frequencies differ For any chi squared test of independence, the expected frequency for a cell is found by [(row total) (column total)]/grandtotal] O True O False

Q: Suppose that a researcher is interested in differences between young adults and older adults with…

A: We know that the assumptions of chi-square test are; All observations are independent of one…

Q: We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test…

A: The sample size is 50 and the relative frequencies are 0.65, 0.30, and 0.05.

Q: A chi-square goodness-of-fit test using a significance level of α=0.05 was conducted to investigate…

A: It is needed to test, whether the number of babies born in a town is uniformly distributed across…

Q: For a sample of size n = 15,  the critical z-score for 82% confidence is  (two-decimal accuracy,…

A:

Q: The following sample was obtained from a population with unknown parameters. Scores: 13, 7, 6, 12,…

A: From the given information, Sample data = {13, 7, 6, 12, 0, 4} Sample size (n) =6   Consider, Sample…

Q: The ANOVA yielded a significant F statistic, so the null hypothesis is rejected. Since there are…

A: There are 3 groups  Group 1 - No sleep Apnea Group 2 - Untreated sleep Apnea Group 3 - Treated sleep…

Q: 1. Tukey's multiple comparison test was performed, and the Minitab output was obtained below. Which…

A: If the confidence interval for each pair contains 0, then there is no significant difference in the…

Q: We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test…

A:

Q: If the chi-square value obtained in a statistical test is Χ 2= 7.00 and the sample size is n = 64,…

A: The test statistic is 7.00, and sample size is 64. The phi-coefficient is,…

Q: Here sample 10 people in a high school to try to predict GPA in 10th grade from GPA in 9th grade.…

A: It is given that the SSE =5.8, sample size (n) is 10 and the regressor is GPA. Therefore, the…

Q: Which table is used to find the critical value in the Cochran Q test?

A: In Cochran Q test, we use asymptotai critical value.

Q: The number of degrees of freedom in a chi-square test refers to the number of values free to vary…

A: The number of degrees of freedom in a chi-square test refers to the number of values free to vary…

Q: ple, the sample mean and sample variance are calculated to be X = 8.25, S2 st with significance…

A: Given: The sample size is n=81. The sample mean is X=8.25. The sample variance is S2=14.6. The level…

Q: In a study of the accuracy of fast food drive-through orders, one restaurant had 39 orders that were…

A: The random variable X follows binomial distribution. X ~B (n p). The number of successes is 39. The…

Q: For a confidence level of 94% for a mean with n = 19, find the critical value t.Enter the answer to…

A: Given that, n = 19, c= 94% The degree of freedom is,

Q: Find the P-value for a right-tailed test about a mean with n = 36 and test statistic t = 46.2766 at…

A: Given, Degrees of freedom:

Q: Suppose the average temperature of 30 randomly selected days of the year in Hawaii was 82.6∘F with a…

A: Given values are as follows: Population meanμ=82.6Population standard deviationσ=8.3Sample…

Q: A random sample of 100 customers were observed to find out if the waiting time for customers in…

A: Given data : sample size, n =100 sample mean, x̄ = 202 sample standard…

Q: Suppose for a sign test, there are 8 plus signs, 3 negative signs and 1 zero. A. What would be the…

A:

Q: e) Find the critical value used to construct a 80% Confidence Interval for the mean. Only for this…

A: Solution: e. From the given information, the population standard deviation is σ=23.8 is known. The…

Q: One sample has n = 17 with SS = 1646, and a second sample has n = 17 with SS = 1710. If the sample…

A:

Q: A sample of n = 100 people is classified into four categories. If the results are evaluated with a…

A: We know that Degree of freedom =No. of class -No. of condition. Since there will be only one…

Q: • Find the p-value for a two-tailed test of hypothesis for a mean when the test statistic has been…

A: Answer - Find the P-value for a two tailed test of hypothesis for a mean               given test…

Q: We want to determine the mean weight of a certain type of fish. If we also want to estimate u to…

A: Given that, Critical values: Using the z-table, the critical value at 95% confidence level for two…

Q: Suppose that you go to a NJ lake to grab water samples to test algal concentrations using a cell…

A: Given information- Population standard deviation, σ = 250 ml Confidence interval = 0.95 Significance…

Q: With a = .05, what is the critical t value for a one-tailed test with n = 15?

A: Solution: We are given:Level of significance = 0.05Sample size = 15The test is one-tailed.We have to…

Q: In a study of the accuracy of fast food drive-through orders, one restaurant had 32 orders that were…

A: Given values,

Q: We have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fit test…

A:

Q: From previous studies, it is concluded that 90% of phone numbers in a certain city are unlisted. A…

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

Q: Suppose a random sample of 320 students was asked to indicate which of 4 candy 'items' they…

A: Chi square χ2 test: Chi square test is used to test whether the distributions of categorical…

Q: Exactly 50% of the observations will aleays lie at or above the A) mean  B) maximum C) third…

A: Median: It is the middle most value of the data set that divides the whole data into two equal parts…

Q: A carpenter is making doors that are 2058 millimeters tall. If the doors are too long they must be…

A: Null hypothesis:µ=2,058.Alternative hypothesis:µ≠2,058.Here, the sample mean, x-bar is…

Q: Suppose X is a normal population with the mean D and standard deviation O = 15. A sa of size 25…

A: b. Given that the population standard deviation is 15. Sample size is 25 Sample mean is 81.…

Q: A random sample of 100100 observations from a population with standard deviation 26.2698667319741…

A: Solution-: Given: We find, (a) Vs (Right tailed test )               (i) Critical z-score     (ii)…

Q: B) In a sample of n = 50 people who recently received parking tickets, 36 were older than 25 years…

A: According to our policy, we can answer only first 3 part, for remaining please repost the question.

Q: Given the mean of the difference is 7.0, standard deviation of the difference scores is 2.8, and…

A: Given that the mean difference is, x¯d = 7.0 The standard deviation of the difference is, sd = 2.8…

Q: With α = .05, what is the critical t value for a one-tailed test with n = 15?​

A: Given level of significance = 0.05 and one tail test.we need critical value for t distribution with…

Q: From previous studies, it is concluded that 90% of phone numbers in a certain city are unlisted. A…

A: Given Information: Hypothesized value p0= 90% = 0.90 Sample size (n) = 800 Out of which 81% phone…

Q: A random sample of monarch butterflies and a random sample of swallowtail butterflies were selected,…

A:

Q: Q2. Under imperfect multicollinearity, A) the OLS estimator is biased even in samples of n> 100. B)…

A: Imperfect multicollinearity means that there is a linear relationship between the variables, but…

Q: A researcher was interested in comparing the response times of two different cab companies.…

A:

Q: A random sample of monarch butterflies and a random sample of swallowtail butterflies were selected,…

A: As we know p value is probability of getting resulat as extreme as sample while assuming Ho is true.…

Q: Suppose that the quality control manager for a cereal manufacturer wants to ensure that bags of…

A: Ho: The results are Statistically significant. H1: The results are not Statistically significant.…

Q: (a) According to this information, the mean weight loss of people on this drug, u, could be as low…

A: Given: x¯=23Margin of error, E=2C=95%

Q: d) Create a 99% Confidence interval for the mean. Provide a sketch of the critical value and…

A: The data set is: 40 33 77 12 23 56 23 19 29 Population standard deviation…

Q: From previous studies, it is concluded that 70% of workers got their job through internet resume…

A: Given Information: 70% of workers got their job through internet resume sites.  Sample size n=100…

Q: 10. A random sample is selected from a normal popula- tion with a mean of u 40 and a standard…

A: Given A sample from normal population consist of : σ=6,  μ=40,  x=37,  α=0.05

Q: A machine filles milk bottles, the mean amount of milk per bottle is supposed to be 32 Oz with a…

A: As per our company guidelines, we are supposed to answer only the first question. Kindly repost…

Q: This is a two-tailed test, so we are concerned about the critical values that give a total area of…

A: The level of significance is α = 0.05.