The average score on the standard I.Q test is 100 with standard deviation 15. The     Mensa group accepts people into the organization if the I.Q is in the top 5% of all I.Qs . What is the I.Q cutoff for the organization

Q: A) A bell-shaped distribution has a mean ?=1200 and standard deviation ?=340.  Find the proportion…

A: Theoretical distribution is a branch of a frequency distribution. The theoretical distribution…

Q: Suppose you know the population average wage in the manufacturing industry in the U.S. is $26.72 per…

A: Type II error = P( Fail to reject Ho| When mu = 25)

Q: When the mean of the sample 15 countries' fiscal-balance-to-GDP ratio (expressed as %)  is -5.74 and…

A: Sample mean, x = -5.74  sample standard deviation , s = 5.97 sample size, n = 15   Claim to be…

Q: As part of the National Health and Nutrition Examination Survey, subjects were asked how long they…

A: The question is about descriptive stats Given : Data :   To find : Value of mean

Q: You may need to use the appropriate appendix table or technology to answer this question. A sample…

A: population mean, μ = 1110 standard deviation , σ = 160   sample size, n = 64 sample mean, x = 1135

Q: In the 1980s, a research study linked drinking coffee to a higher risk of heart disease and pancreat…

A: Introduction: A confounding variable in a study is a variable that is not acknowledged or controlled…

Q: What is the z score for 20 if mean =28 and stadnard deviation =6

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: bengs spe Webster students. On average these Webster students spend 8.5 Euros for their lunch. Do…

A: It is an important part of statistics. It is widely used.

Q: The margin of error is 6, with a sample standard deviation of 20 and 92% level of confidence. Step…

A: As the population mean is estimated on the basis of sample mean, there must be some error in…

Q: Suppose that the lengths of pregnancies are normally distributed with a mean of 274 days and a…

A: The provided information is  µ=274 σ=10 P(X>280) P(X-µσ>280-27410)=P(z>0.6000)=0.2743 (from…

Q: Tom scored a 117 on a measure of math ability and a 41 on a measure of verbal ability. The means and…

A:

Q: Psychological and educational tests, including MMPI are often designed so they have a mean of 50 and…

A: Given that  They have a mean of 50 and a standard deviation of 10.

Q: Supp_ose that, in a cert_ain sta_ge, only 60% of_ all dri_vers re_gula_rly we_ar a seat_be-lt…

A:

Q: Suppose you know the population average wage in the manufacturing industry in the U.S. is $26.72 per…

A: true mean value = 25 mu = 26.72 s = 2.6

Q: if the grades you receive are good bad and unacceptable , would this be a qualitative or a…

A: Qualitative measure is a type of information that describes traits or characteristics  And the…

Q: noat question Assuming a normal curve, find the highest Z score a person could have while being in…

A: Given that  A) P(Z < a) = 32% B) P(Z < b) = 6%

Q: As reported in Runner's World magazine, the times of the finishers in the New York Cit km run are…

A:

Q: 20. For the data in the following sample: 10, 6, 8, 6, a. Find the mean and the standard deviation.…

A: 20. a. The mean of the sample is, x¯=∑ixin=10+6+8+6+55=355=7 Thus, the mean of the sample is 7. The…

Q: Calculate the means and standard deviations of:1, 2, 3, 4, 5 a. O mean = 3; st. dev. = 1.414 O b.…

A: GIVEN DATA ,1,2,3,4,5HERE WE HAVE TO FIND OUT THE MEAN AND STANDARD DEVIATION FOR GIVEN DATA SCORE…

Q: Given the following grades on s test: 86, 92, 100, 93, 89, 95, 79, 98, 68, 62, 71, 75, 88, 86, 93,…

A: The objective of this question is to find the percentage of scores that lie within one and two…

Q: What is the Mean deviation of the numbers 0.5, 0.8, 1.1, 0.9 and 0.6

A: The data is given by 0.5, 0.8, 1.1, 0.9, 0.6 And the mean of these numbers is Mean = (0.5 + 0.8 +…

Q: Consider the variable, type of birth control practiced (e.g., an IUD, condoms, none, etc). Which…

A:

Q: c. Analyzing marks of 15 students from Spring 2020, you found their mean to be 23.6 and standard…

A: Data given Summer 2020  23,18,17,24,27,18,14,29  Spring 2020  n=15, x̄=23.6, s=4.9

Q: what does the mean and the standard deviation represent in data set? how would i interpret the…

A: Mean and standard deviation in data set:The mean represent the average value in a data set. In other…

Q: 4. The mean score of 100 BS Biology students on a 100-item chapter test is 92. midpoint method. What…

A: Midpoint Method  Mean = x¯=x1+x2+...+xnnwhere n - number of observationsx¯=∑fixii∑ifi Deviation…

Q: The Bureau of the Census provides figure on the average annual income of all Pakistan households in…

A: Given that The mean household income in 2015 = $32,144. The median household income in 2015 =…

Q: The sample mean or sample proportion is unbiased estimator to the population proportion in case of…

A: The sample mean or sample proportion is unbiased estimator to the population proportion in case of…

Q: Convert the following to z-score: c. Raw score of 86; mean of 55; SD of 17 d. Raw score of 115; mean…

A: we know that  Z-score=X-μσwhere X=Raw scoreμ=meanσ=SD

Q: B. Your process has a normal histogram with mean located at 10 mm, 1s points at 9.9 and 10.1 mm, 2s…

A: Consider the give information in which a process has a normal histogram with mean located at 10 mm.

Q: The MF exam has a population mean of 500 and a standard deviation of 200. What are the scores for…

A: Let X=MF exam scores We have given information, The population mean μ=500 And population standard…

Q: In a population of ages where the mean age is 45 and the standard deviation is 5.25, what are the…

A: Given Mean=45 Standard deviations=5.25

Q: Find the standard deviation of the following data: 13,18,13,14,13,16,14,21,13

A: Given data is13, 18, 13, 14, 13, 16, 14, 21, 13Sample size(n)=9

Q: Is the height (in inches) of students in this class a quantitative or qualitative variable

A: Qualitative variable : It contains name or levels Example : eye colour, method of study...…

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of…

A: GivenMean(μ)=72standard deviation(σ)=9

Q: . Average annual expense of a middle-income household living in Afghanistan is 360,000 Afghani with…

A: Given, Mean μ = 360000Standard deviation σ = 4000sample size n = 1500

Q: National park services, a bureau of the US government responsible for park management, is interested…

A: For current year: The mean can be obtained as: Thus, the mean is 74.56. Arranging the data set into…