A patient recently diagnosed with Alzheimer's disease takes a cognitive abilities test and scores a 45. The mean on this test is 52 and the standard deviation is 5. What is the patient's percentile?

Q: A group reported the accompanying annual rainfall (in inches) for a particular city in Oregon over a…

A: Given:n = 59Formula Used:Relative frequency =

Q: (2) Find the density of X² when X The following answers are proposed. (a) fy(y) = λe-λ(y)¹/2" (b) ƒy…

A: The random variable  follows exponential distribution with parameter  is given as follows:i.e.

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Population proportion(p)=0.12 confidence level=98% Margin of error(E)=0.015

Q: York Manufacturing Inc. offers dental insurance to its employees. A recent study by the human…

A: Population mean μ =1234 Population standard deviation =321

Q: A research team conducted a study to examine the differences between male and female students in the…

A: A - The appropriate null hypothesis for the study problem could be:"There is no significant…

Q: (a) Please derive the least squares regression line, y = ax + b, for the points (x₁, y₁), i = 1,...,…

A: The prediction analysis can be made the prediction based on the least square regression. It shows…

Q: (a) State the null hypothesis Ho and the alternative hypothesis H₁. H :O H₁:0 (b) Determine the type…

A: Let μ be the population mean sodium level for healthy adults. Given that, Population mean (μ)=138…

Q: According to a recent survey of 1300 people, 5416 feel that the president is doing an acceptable…

A: The question is about confidence intervalGiven :Randomly selected no. of people under survey ( n ) =…

Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A: as per policy i have calculated 3 subparts  n =  215  X = 179  sample proportion  =  X /n = 179/ 215…

Q: What percent of the data is below 130?  What percent of the data is above 150.8?  What percent of…

A: Given that,To find the following percentages.

Q: If N=480 and p̂ (p-hat) =0.88, find the margin of error at a 95% confidence level.

A: From the provided information, Sample size (n) = 480 p̂ (p-hat) =0.88 Confidence level = 95%

Q: The coefficient of determination of a set of data points is 0.862 and the slope of the regression…

A: From the given information,    The coefficient of determination, r2= 0.862 Slope of the regression…

Q: The prevalence of a trait is 76.8%.  In a simple random sample of n = 50, how many individuals are…

A: We have given that  Probability (p) = 76.8% = 0.768 Sample size (n) = 50

Q: Part A - Create a frequency table + histogra Use appropriate intervals and proper chart formats with…

A: given dataset:- 1, 59, 60, 60, 60, 60, 61, 62, 62, 62, 62, 63, 64, 64, 64, 64, 64, 65, 65, 65, 66,…

Q: From previous experience, the owner of an apple orchard knows that the mean weight of Gala apples is…

A: It is given that, the owner of an apple orchard knows that the mean weight of Gala apples is 140…

Q: What is the P-value for this hypothesis test

A: The test statistic is 2.60.

Q: 1, 59, 60, 60, 60, 60, 61, 62, 62, 62, 62, 63, 64, 64, 64, 64, 64, 65, 65, 65, 66, 67, 67, 67, 67,…

A: The given data is 1, 59, 60, 60, 60, 60, 61, 62, 62, 62, 62, 63, 64, 64, 64, 64, 64, 65, 65, 65, 66,…

Q: What are the null and alternative hypotheses? OA. Ho: H1 H2 H₁: Hy <H₂ OC. Ho: H₁ H₂ H₁: H₁ H₂ OB.…

A: The distribution is normal

Q: 8. Archaeology: Ireland Commercial dredging operations in ancient rivers occasionally uncover…

A:

Q: How closely does the mean of means match the population mean? How is the standard deviation of the…

A: Mean is the average of all the observations in the data set. It is a single value that represents…

Q: N Career 1 Career 2 Career 3 1 59 72 58 2 43 79 49 3 55 81 60 4 53 86 47 Table 1…

A: we were given as number career1 career2 career3 1 59 72 58 2 43 79 49 3 55 81 60 4 53 86…

Q: A state administered standardized reading is given to eighth grade students. The scores for all…

A: Mean(μ)=517 Standard deviation(σ)=63

Q: 2. There are 13 members on the board of directors. a. If they must elect a chairman, a vice…

A: For  no. of selected objects from  available objects, with the assumption that the order of the…

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: x1=64, n1=297x2=12, n1=312

Q: The frequency distribution in the table represents the square footage of a random sample of 510…

A: Square FootageFrequency0 - 4996500 - 999181000 - 1499351500 - 19991232000 - 24991192500 - 2999773000…

Q: Create a stem plot. (Enter numbers from smallest to largest separated by spaces. Enter NONE for…

A: we will first separate the data into stems and leaves before making a stem plot. In a stem plot, the…

Q: The correlation in the data image below is ... O positive, but not +1. zero. none of the above.…

A: Relationship between two variables is depicted

Q: A local county has an unemployment rate of 7.2%. A random sample of 18 employable people are picked…

A: It is given that n = 18 and p = 0.072.Hey there! Thank you for posting the question. Since your…

Q: Consider the following Dataset I. For the dataset, determine what type of chart or graph would best…

A: Based on the given dataset, the most appropriate type of chart or graph to represent the data is a…

Q: what is the probability that her omelet will contain at least one Salmonella contaminated egg?

A: Linda hears a story on National Public Radio stating that one in six eggs in the United States are…

Q: a) Since data were collected for            variable(s), the correct graph to make is a       . b)…

A: Here dependent variable (y) = Average life expectancy Independent variable (x) = Fertility rate No.…

Q: Use a stem-and-leaf plot to display the data, which represent the numbers of hours 24 nurses work…

A: To draw a stem and leaf diagram, we note each of the observed values and divide each such value into…

Q: A bar graph is used with       ["", ""]  and the bars       ["", ""]  touch the one(s) next to it.…

A: Graphs are used to draw the structure and variations of the data so that it can be easily…

Q: The test statistic of z= 1.48 is obtained when testing the claim that p > 0.2. a. Identify the…

A: The question is about hypo. testingGiven :Claim : p &gt; 0.2Test stat : z  = 1.48Level of signif. (…

Q: The following data represent the Sales (in $1000) data gathered from a marketing efficacy study in…

A: The provided data is inserted in Excel as follows:

Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

A: We have given that  p = 75% = 0.75 n = 215x = 179p̂ = x/n = 179/215 = 0.8326Significance level (α) =…

Q: In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to…

A:

Q: A random sample of 25 Berkeley College students was asked, "How many hours per week typically do you…

A: a. To find the mean, median, and mode of the hours worked outside the home for the sample data,…

Q: A telephone survey uses a random digit dialing machine to call subjects. The random digit dialing…

A: The telephone survey uses a random digit dialing machine to call subjects.

Q: What is the effect of this violation on the regression model? "The number of observations n is less…

A: Statistical method that estimates the relationship between a dependent variable and one or more…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Given ,       Mean,μ =267standard deviation,σ=45using formula,Z-score = x-μσ

Q: A psychologist investigated whether there is a difference, on average, in IQ scores for twins. She…

A: given  Sample size (n) = 30 Mean difference (x̄) = 2.1 Standard deviation (s) = 7.2

Q: In the above solution equation what is C?

A: The equation is 17C17*0.167317.I

Q: According to a report in Parade magazine, a nationwide survey conducted by the University of…

A: We have given that Probability (p)  = 0.70  Number of samples(n) = 12 Here we will use binomial…

Q: Yoonie is a personnel manager in a large corporation. Each month she must review 16 of the…

A:

Q: Use the following information for parts (a) – (c): The 2 x 2 table below displays the results of a…

A: Consider the given 2x2  table that displays the results of a cross-sectional study that investigated…

Q: Sociologist have recently started to examine the growing social trend of older women dating younger…

A: The test is to check whether the average difference in the age of couples with the females are being…

Q: A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older…

A: X' = 96.4SD = 23.7n = 17

Q: Hamilton County Judges Reporter Kristen DelGuzzi of The Cincinnati Enquirer is writing a piece about…

A: The question is about conditional probability Given : Total no. of court cases disposed = 182908 No.…

Q: why did you add .032 when you did not list it p(x=6)?

A: The probability distribution table of X provided in the question is as follows…