What is the expected frequency for each category in the table below?  Calculate the chi-square and determine if the null hypothesis (there are no significant differences) should be rejected or accepted. Report the calculated chi-square and whether you accept or reject the null hypothesis for the data.   Police are Police are not Row Total   Approachable Approachable   Not afraid at all fo = 30 fo = 40 70 Somewhat unafraid fo = 20 fo = 42 62 Somewhat afraid fo = 60 fo = 40 100 Afraid fo = 55 fo = 20 75 Column Total 165 142

Q: Manager claims average sales for her shop is $1800 a day during winter months. 10 winter days…

A:

Q: The appropriate statistical tool for predicting the value of a random variable based on the values…

A:

Q: Identify the test statistic. |t= (Round to two decimal places as needed.) Identify the P-value.…

A: According to the given information in this question We need to apply paired t test

Q: An electrician wants to know whether batteries made by two manufacturers have significantly…

A: Given that  Sample sizes n1=92     , n2=92      Sample means X̄1=112     , X̄2=111    ?1 =3…

Q: A toy manufacturer wants to know how many new toys children buy each year. Assume a previous study…

A: Given that ,Variance = 3.61Margin of error , E = 0.09confidence level , C = 99% = 0.99Using formula,…

Q: Analyze the output and write a short summary statement about your conclusion.

A: Concept of p-value: The p-value in hypothesis testing is the probability of obtaining a test…

Q: n a random sample of​ males, it was found that 25 write with their left hands and 219 do not. In a…

A: given data, male:25-write with left hands219- do not 244-   total malex= no. of left…

Q: For each case below, tell me which type of statistical error you would want to favor and why: You…

A: 1. It is given that, the patient noticed a bump and worry it might be a tumor.

Q: From your textbook's Your Turn: Do people spend more time watching videos on Facebook than on…

A: Denote μ1, μ2 as the population mean times on Facebook and population mean time of YouTube,…

Q: Magnetic surveying is one technique used by archaeologists to determine anomalies arising from…

A: Consider r be a random variable which follows binomial distribution here indicates the number of…

Q: A researcher wants to know if there is a relationship between gender and the likelihood of being a…

A: The following information has been given:   Male Female Yes 20 70 No 80 30…

Q: A marketing executive is investigating whether this year’s advertising campaign has resulted in…

A:

Q: A researcher used an analysis of variance (ANOVA) to compare four treatment conditions with a…

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

Q: What is a statistical research tool that is used to simultaneously test the equality of multiple…

A: We are given that  A statistical research tool that is used to simultaneously test the equality of…

Q: CAN SOME HELP ME FIGURE OUT THE ...NULL HYPOTHESIS,ALTERNATIVE HYPOTHESIS, THE TYPE OF TEST…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…

Q: Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of…

A:

Q: Decide whether to reject or fail to reject the null hypothesis. If you choose to reject the null…

A: Given information: The sample size is n = 100. The population mean is µ = 7.01. The sample mean is…

Q: Researchers look at the role of music on anxiety.  They believe the type of music will make a…

A: Solution:  Given information: n1=14 Sample size of classical music groupn2=14  sample size of Tecno…

Q: Chi-square tests are used to test relationships between categorical or ordinal values - to determine…

A: In the given problem we have, Chi-square tests are used to test relationships between categorical or…

Q: A researcher wants to know if exercise reduces anxiety in older people. She recruits a sample of…

A: A researcher wants to test whether exercise reduces anxiety in older people. We know that a sample…

Q: not sigmal square is equal to sigma 2 square

A: From Given Information  To test: H0:σ12=σ22VersusH1:σ12≠σ22

Q: The chi-square statistic for this table is 3.95. Are you able to reject the null hypothesis? Why or…

A: We have given observed value of chi square for a contingency table and we have to decide that if we…

Q: A manufacturer claims that its compact fluorescent bulbs contain an average of 1.1 mg of mercury.…

A: given data  claim: μ= 1.1 mg two tailed test. find null and alternative hypothesis.

Q: In high-income countries (as defined by the World Bank,) 22% of all babies are breastfed. Tajikistan…

A: Given that From the given data the correct choice is one proportion  Explanation:

Q: 3 The mass of packages from a particular machine are normally distributed with a mean of 200g and…

A: Given that  X~Normal(μ = 200, ?2=9) μ = 200 , ? = 3

Q: Magnetic surveying is one technique used by archaeologists to determine anomalies arising from…

A: Let,   X: magnetic susceptibility reading for a randomly chosen site at an archaeological research…

Q: You compute a two-sample z statistic and it comes out to equal 1.15. What is the p-value if you are…

A:

Q: Assume that the two samples are independent simple random samples selected from normally distributed…

A: The hypothesis test is a statistical method in which one using the sample data try to check the…

Q: In a test of hypothesis, the null hypothesis is that the population variance is equal to 4 and the…

A: The given information for the hypothesis test is as follows:Null Hypothesis H0: The population…

Q: at are the degrees of freedom for the t-test statistic for testing if the means of two populations…

A: The given data is Sample from Population 1 Sample from Population 2 22.6 46 37.9 54.9 40.1…

Q: In general, what characteristics of the difference scores are most likely to produce a significant…

A: We have given statement  The characteristics of the difference scores are most likely to produce a…

Q: An electrician wants to know whether batteries made by two manufacturers have significantly…

A: Given Manufacturer Sample mean voltage (millivolts) Population standard deviation (millivolts)…

Q: Summer reading programs are very popular with children. At the Citizens Library, Team Ramona read an…

A: Team Ramona read an average of 23.2 books with a standard deviation of 5.1. There were 16 members on…

Q: A company is doing a hypothesis test on the variation of quality from two suppliers. They believe…

A: Given that Sample sizes n1 = 21 , n2 = 14Standard deviation s1 = 2.9664s2 = 4.4166Level of…

Q: You'd like to test if coffee consumption (coffee drinkers, non-drinkers) affects differences in…

A: The provided information is  We have to test the coffee consumption (coffee drinkers, non-drinkers)…

Q: The standard error of the sample mean of sample size n from a populatțion with variance o is Vn

A: Answer: For the given question, Proof:

Q: Test the indicated claim about the means  of two populations. Assume that the two samples are…

A: Given Information :  Two samples are randomly selected, independent, the population standard…

Q: Reading Program Summer reading programs are very popular with children. At the Citizens Library,…

A: There are two independent samples which are Team Ramona and Team Beezus.We have to test whether the…

Q: You are interested in investigating whether the type of computer a person primarily uses and the…

A: Chi square test is a type of parametric test. It is used to whether the sample is independent or…

Q: Magnet Sham Researchers conducted a study to determine whether magnets can affect back pain. The…

A: The random variable pain follows normal distribution. There are two independent samples which are…

Q: Mean 1001 206 Levene's Test for Equality of Variances Sig. 15.578 <.001 .510 1.402 df Sig.…

A: Solution: The output for the independent samples test is given.

Q: ormality assumption? Provide evidence and a discussion of support for meeting the assumption.  Does…

A:

Q: (a) Let 4, be the population mean of x, and let 42 be the population mean of x2. Find a 95%…

A: For x1, sample size is 34, sample mean = 67.00 and population SD = 11.97 For x2, sample size = 35,…