Use the nomal disuIbuuon to he nght to answer the questions. 7IDIPDUIPIS Scores Composite (a) What percent of the scores are less than 19? (b) Out of 1500 randomly selected scores, about how many would be expected to be greater than 21? µ=20.6 o=5.2

Q: magine that I want to conduct a survey to find out how many households have at least one cat. If I…

A: It is given that margin of error (E) is 0.10 and the confidence level is 0.80.

Q: 2. Given: n=80, a = 15, level of confidence is 92%. What is the margin of error of the given data?

A:

Q: Are the following results significant at α=.01? F(2,27) =10.56, p=.02

A: Given information- Significance level, α = 0.01 F (2, 27) = 10.56 We have given the p-value = 0.02

Q: Fifty people are selected randomly from a certain population and it is found that 12 people in the…

A: We have to find correct point estimate for proportion.

Q: A software company is interested in improving customer satisfaction rate from the 62% currently…

A: For the given data Find test statistic =?

Q: o=58. From sample sizes of 36 adults find the proportion of sample means having values of at least…

A: here , sample size  = 36 population  mean = 162 population standard deviation = 58

Q: Cancer No Cancer Positive Test Result 41 26 Negative Test Result 11 672   (a) What is the…

A: This question is related to specificity and sensitivity of a diagnostic test result, we will solve…

Q: how large of a sample n would you need to estimate p with a margin of error 0.01 with 95%…

A: Given Information: Margin of error = 0.01 Confidence level = 95% p^=0.2 To find sample size n:…

Q: Let u denote the actual population mean amount of mercury in tuna per ounce. The hypotheses for this…

A: Given : μ = 10.13 σ = 2.03

Q: d. Find the approximate p-value of the test. p-value = (Round to three decimal places as needed.)

A: From Part (c), the test statistic is -1.42.

Q: Mrs. Bollo's second grade class of 30 students conducted a pet ownership surve Results of the survey…

A:

Q: An apple, 37% of the people polled answered yes to the question "are you in favor of the death…

A: The provided information is: Sample proportionsp^=0.37 Margin of errorE=0.03 Level of…

Q: A researcher at a major hospital wishes to estimate the proportion of the adult population of the…

A: Obtain the large sample size. The large sample size is obtained below as follows: Use EXCEL…

Q: he result for a Pearson’s r for students’ perceived learning and their sense of community was, r(45)…

A: The sample correlation, observed from a sample size of n=45, is r(45) = r = 0.72 while the…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: From the provided information, Margin of error (E) = 0.04 Confidence level = 90%

Q: A fire insurance company wants to relate the amount of fire damage in r fires to the distance…

A: Regression Equation = ŷ = bX + a

Q: (d) How many subjects are needed to estimate the mean number of books read the previous year within…

A: (d) The mean number if books read the previous year within four books, and standard deviation is13.3…

Q: The engineering school at a major university claims that 20% of its graduates are women. In a…

A: Given, Given, Sample size= 201 No. of females(x)= 58 Sample portion(p̂)= x/n p̂=58/210=0.276 α= 0.05

Q: 2 3 4 Amount of alcohol (oz.) No. of errors on dri ving test

A: Given: The graph given is as follows

Q: Out of 300 people sampled, 153 said they prefer Coke over Pepsi. What is the point estimate for the…

A: Consider that p is population proportion of ALL people that prefer Coke over Pepsi.

Q: Compute the standardized test statistic, y, to test the claim o <3.2 if n= 20, s = 6.2, and a= 0.01.…

A: Standardized Chi-square Statistic is given by,

Q: (c) Consider the information given above and suppose that the number 10 was observed on 26 occasions…

A: here we data id provided that dice has 13 sides and it is rolled 208 times.

Q: Social network news In 2012, Pew Research noted that34% of young adults age 18 to 24 got some news…

A: It is given that difference in proportion is not significant.

Q: A sample has SS= 20 and s2 =4. How many scores are in the sample?

A:

Q: The diameter of a bull-eye is 4cm. The radius of the middle blue circle is 6cm. The radius of the…

A: Topic:- probability

Q: f n=18, x = 33, and s = 8, find the margin of error at a 80% confidence level Give your answer to…

A: Given data n = 18 x =33, s= 8 Confidence level c = 0.8 α = 1- 0.8 = 0.2

Q: Find the value of ta for a 99% confidence interval when sample size is 30. n = 45, s² = 23.5,90%…

A: Sample size is n=30 Significance level α=0.01 df=n-1=30-1=29tα2=t0.012=t0.005=3.038,         From…

Q: In order to determine whether the treatment group is independent of the coughing diagnosis, a…

A: The test statistic for the chi-square test is given below:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: It is given that there is 95% confidence.

Q: How many people should I poll to guarantee the actual error on qn is less than e, with 90%…

A: Given we dont know p, we use p = 0.5 to get a conservative value of the sample size as for p =0.5,…

Q: (d) How many subjects are needed to estimate the mean number of books read the previous year within…

A: (d)

Q: Of 500 randomly selected football players at the university of Jordan, 200 players ordered medium…

A: We have to find sample size required.

Q: A survey of 400O non-fatal accidents showed that 189 involved the use of a cell phone. Determine a…

A:

Q: 1. Given: n=130, a = 25, level of confidence is 90%. What is the margin of error of the given data?

A: The sample size is given as 130, n=130 The standard deviation is given as 25, σ=25 The Confidence…

Q: What percent of our campus is female? The Statistical Abstract of the United States, 112th edition,…

A:

Q: 9) How many people N should you poll to guarantee the actual error between ĝn and q is less than e,…

A: 9. From the part 8, q^N follows Normal distribution with Eq^N=q and variance Eq^N=4*p^N1-p^NN.…

Q: The number of contaminating particles on a silicon wafer prior to a certain rinsing process was…

A:

Q: 1. What is the z-score of: 1.1) Bria? 1.2) Bryce? 1.3) Clyde?

A: Here we will use Excel command for Normal distribution

Q: Consider the alternative estimator of o?, (n – 1)S²In. Find the mean squared error of this…

A:

Q: Define If the actual Y score was 31, but the predicted score was 28, then the error of prediction is…

A: The formula for the calculation of the prediction error is given below:

Q: Based on a sample of 800 people, 48% owned cats The test statistic is:  (to 2 decimals) The…

A: The test statistics of a proportion z-test is z=p^-pp1-pn Since the p-value to be tested is not…

Q: For a population of σ = 16, how large a sample is necessary to have a standard error that is a. less…

A: Obtain the large sample that is necessary to have a standard error that is less than 8 points. The…

Q: ind the coefficient of skewness from the following information. (a) define of two quartiles=8 (b)…

A: Given : (a) difference of two quartiles=8 (b) sum of two quartiles=22 (c) mode=11 (d) mean=8

Q: Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the…

A:

Q: How many people should I poll to guarantee the actual error on pN is less than e with 90%…

A:

Q: Find the value of −zα/2 that corresponds to a confidence level of 89.48​%.

A:

Q: 1(b). At 99% confidence, what is the margin of error?

A: here use given data table

Q: Jata provided below an 30 minutes after a Kettleball workout a to test to de termine 66 73 79 66 70…

A: Let d = Before (X) - After (Y)