random sample of 1000 students. Respondents were classified by gender (male or female) and asked if she/he smoked. Results are shown in the contingency table below:   smoke Not smoke Total Male 200 200 400 Female 250 350 600 Total 450 550 1000   Is there any relationship between the gender type and smoking? Use a 0.05 level of significance. Note: calculate the expected value, then calculate the chi-square.

Q: local CBS affiliate claims its 11p.m. newscast reaches 41% of the viewing audience in the area. In a…

A: Given that p^=36%,p=41%

Q: Suppose a random sample size of 60 is taken from a population with p = 0.51. What is the mean of…

A:

Q: Find the Zc value for a 92% confident interval when the sample sizes 27

A:

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A: The attributable risk percent among the exposed is given as: Risk percentage among exposed=Number of…

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A:

Q: ​Claim: Most adults would erase all of their personal information online if they could. A software…

A: Introduction:Denote p as the true proportion of adults who would erase all of their personal…

Q: Please answer this and provide different scenarios as needed, thank you     A simple random…

A: The data relating to sports was given.

Q: A national health survey weighed a sample of 260 boys aged 6-11 and found that 45 of them were…

A: Hypothesis Testing

Q: The test scores of 15 students are listed below. Find the first quartile, Q1. 42 48 54 56 61 64 67…

A: The objective of this question is to find the first quartile (Q1) of the given set of test scores.…

Q: In a distribution with M = 3.40, SD = 1.47, what proportion of scores fall between 2.55 and 5.32?

A: Given that  M = 3.40, SD = 1.47 P(2.55<X<5.32)=?

Q: A magazine article reported on Springfield School District's magnet school programs. The article…

A:

Q: The instructor takes a random sample of size from the population data and obtains the following…

A: Given data: 405,385,495,385,555,470 n = 6

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A: a:For the given data, the chi-square test for association is appropriate.Null Hypothesis:H0: The…

Q: The final answer for the test statistic from technology is as follows: Round to 2 decimal places. t…

A: In 1999, the average percentage of women who received prenatal care per country was 80.1%. want to…

Q: en reported that 42.6 % of workers employed as purchasing managers are males. In a random sample of…

A: The sample proportion is calculated as: p^=xn=70200=0.35

Q: The types of raw materials used to construct stone tools found at an archaeological site are shown…

A: We know that the chi-square statistic is given by; where; O = Observed Frequency E = Expected…

Q: Professor Zuro surveyed a random sample of 420 statistics students. One of the questions was "Will…

A: GivenTotal no. of statistics students(n)=420No.of students said yes for math class(x)=252

Q: reported that the 27-year-old mother of three worked, on average, a 75 hour week. Recently, many…

A: As the population standard deviation is not known, we will use a t-test. The null and alternative…

Q: Using the descriptive statistics above, find the sample variance.

A: Measure of central tendency measures the central or average value of a dataset. Measures of…

Q: a. Construct a 90% confidence interval to estimate the actual proportion of mothers with…

A:

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

Q: Using EXCEL, develop a 95% confidence Interval estimate for the Mean number of miles driven until…

A: 1. The 95% confidence interval is obtained by using the EXCEL(PHStat). The software procedure is…

Q: What is the mode for this data set

A: The data that has the highest frequency is called mode. In other words, it is the most frequent…

Q: A researcher gathered from historical papers that the proportion for the success of an event was…

A:

Q: . What statistical test should he use to analyze the data?

A:

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: You are testing a claim about a population proportion of 0.23. Find the test statistic given the…

A: Given that, You are testing a claim about a population proportion of 0.23.  The sample results are…

Q: What is the variable of interest? Whether or not a patient is satisfied with the level of care.…

A: The objective of the question is to identify the variable of interest in a given scenario. The…

Q: Find the estimated standard error for the sample mean for n = 8 and SS= 5042.

A: Given n=8, SS=5042

Q: A manufacturer of colored candies states that 13% of the candies in a bag should be brown, 14%…

A: Consider that pi’s are the proportion of the candies of brown, yellow, red, blue, orange and green…

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Q: ter screens were randomly selected from a large collection of computer screens in a company’s…

A: A sample is a part of the population, which is selected from the population and if the sample is…

Q: A manufacturer of colored candies states that 13% of the candies in a bag should be brown, 14%…

A: Assume that pi’s are the proportion of the brown, yellow, red, blue, orange and green colour candies…

Q: Determine the null and alternative hypotheses. Choose the correct answer below. O A. Ho: The…

A: Test is that whether the bag of colored candies follows the distribution stated by the manufacturer.

Q: How do you find the maximum on a box and whisker plot?

A: If a data set is given then we arrange the data in ascending order and see the highest value…

Q: A random sample of 1756 Texas government employees were selected for a study on race.  The table…

A: Given Information: Observed Frequencies of Race from the Sample: Outcome Observed Frequency…

Q: Twenty years ago, 56% of parents of children in high school felt it was a serious problem that high…

A: The hypothesized proportion is 0.56.

Q: n₁ = 50, x₁ =35, and n₂ = 60, x₂ = 40 OA. 0.982 OB. 0.374 OC. 2.361 OD. 1.328

A: To find: Find the standardized test  statistics.