It has been said that the overall number of male and female customers in a retail outlet specializing in the sales of slacks and jeans are equal. A survey was conducted and found out that out of 95 customers, 45 are female and 50 are males. Can we say that the male and female customers are equal in number? Use a 5% level of significance.

Q: At the 2% level of significance, what is the decision?

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A: given information :n=20      µ=40 ,σ=70,α=0.05 x_bar=56.7 hypothesis define: H0.u=40H1: μ not equal…

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A:

Q: A cohort study examined the association between smoking and lung cancer after following 400 smokers…

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Q: A health psychologist wanted to test if discussing the health disparities of a patient with their…

A: As we are authorized to answer only 3 subparts for each question and that you haven't specified…

Q: an you conclude that the percentage of people aged 18-29 who have a tattoo is less than 25%

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A: If P-value ≤ α, reject H0. If P-value > α, do not reject H0.

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A: Formula : Test statistic

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Q: A research report from an independent-measures study states that there are significant differences…

A: Given information- We have given a report from an independent- measures study. F(3, 48) = 2.95, p…

Q: One sample with n=4 scores has a mean of 12, and a second sample with n=6 scores has a mean of 8.…

A: Given information Sample 1 n1 = 4, µ1= 12 Sample 2 n2 = 6, µ2= 8

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A: Null and alternative hypotheses: The hypothesis which is tentatively fixed up under and tested for…

Q: What is the mean for the combined set if both of the original samples have n = 4 scores? What is the…

A: Given that For sample 1, mean M1 = 8 For sample 2, mean M2 = 16

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Q: The local school is conducting another survey to determine the proportion of students at the school…

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Q: It is thought that 12% of all students taking a particular course received a grade of A. In a sample…

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Q: In 2007, the CDC reported that approximately 6.6 per 1000 (0.66%) children were affected with autism…

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Q: A coworker says she needs to test 5000 subjects in order to have enough power to detect a…

A: Here for the above question, effect size is related with a sample size. As we know a test is…

Q: In 1945, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Let, X1= number of abstainer in the previous test n1= total sample size of the past test p1^ =…

Q: Addmissions officer sampled 124 entering freshmen and found that 35 of them scored less than 530 on…

A: According to the provided information, x=35 n=124

Q: A researcher is interested in determining if the proportion of children that collect specific types…

A: Given Solution:

Q: In order manufacturer is claiming that its new 2021 SUV model will have better gas mileage than the…

A: (a) The null and alternative hypothesis is, H0:u=30H1:u>30              (right tailed/one tailed)…

Q: a pollster wishes to estimate the number of left-handed scientists. How large a sample is needed in…

A: Given P=0.09 E=0.06 Z(0.01)=2.33

Q: rofessor Jennings claims that only 35% of the students at Flora College work while attending school.…

A: We are testing single proportion in this problem. (a) Level of significance: 0.05 Null and…

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A:

Q: Is the proportion of twin births among teenage mothers different from the overall figure?

A: It is given that Sample size n = 469 Number of twin births, X = 7 Level of significance = 10% = 0.10

Q: in a gallup poll of randomly selected adults, 66% said that they worry about identity theft.  For a…

A: Given,         sample size(n) =1013    The probability of an adults said that     They worry about…

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Q: Only about 10% of all people can wiggle their ears. Is this percent different for millionaires? Of…

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Q: In spss, what test can you do to compare the score of variables?

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Q: A Harriss poll taken surveyed 2016 adults and found that 423 of them had one or more tattoos. can…

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Q: A telecommunications company knows that 90% of their customers own smart phones. Ten customers are…

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Q: health psychologist wanted to test if discussing the health disparities of a patient with their…

A: Here it is given that- Population mean (μ) = 40 Population standard deviation (σ) = 70 Total number…

Q: If a person’s z score equals 1.61, what percentage of the observations are more extreme?

A:

Q: A previous study showed that 69% of community college students have read a book for personal…

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Q: In a small grocery, 23% of the bottled products were sold while 63% of the canned goods were not. If…

A: Solution To find the confidence interval we will use z distribution.

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A: It is given that the sample size n is 75 and x is 8.