Statistics Question

Q: Write a short description of the bootstrap method of sampling. Possible plan (you can use your own p...

A: Given: On using the bootstrap method of sampling the explanation as follows, For quantify the uncert...

Q: Find the mean: 4,5,7,9

A: The data set is: 4,5,7,9

Q: Professor Adams wrote a book called Improving Your Memory. The professor claims that if you follow t...

A: Introduction: Sign test is used in case of dependent or matched pairs. The exam scores for the first...

Q: Q1. Define 'Correlation' and 'Regression'. Calculate the rank correlation from the following data: 7...

A: Correlation may be defined as the degree of association between two variables X and Y. It is general...

Q: You forget to study for the multiple choice exam in your next class. Suppose the test has 5 question...

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

Q: Recall that zα denotes the value for z for which the area under the standardnormal curve to its righ...

A: Solution We have given the standard normal distribution with mean = 0 and standard deviation = 1 We ...

Q: On a math test, the scores of 24 students were 98 71 75 65 75 75 98 82 75 66 83 71 71 83 75 71 83 75...

A: The first quartile (or lower quartile or 25th percentile) is the median of the bottom half of the nu...

Q: 1. Suppose at a pulmonologist’s office the mean age of patients was 50 years of age with a standard ...

A: (a) The mode is that value in the data-set, that occurs most frequently in the distribution. The ex...

Q: . A random sample of 30 male college students was selected, and their heights were measured. Theheig...

A: Given data, 66 66 74 67 73 6671 69 66 74 68 7370 73 74 68 67 7273 71 69 72 67 6872 73 73 69 73 67 Ar...

Q: a population of value has distribution with μ=52 and σ=90.7 You intend to draw a randomsample of siz...

A: Let Xi be the random variable representing the ith sample,i=1,2,...,111, with μ=52 and σ=90.7. a.) I...

Q: In regression analysis, the variable that is used to explain the change in the outcome of an experim...

A: In regression analysis, the variable that is used to explain the change in the outcome of an experim...

Q: Can you please help with statics and probability

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

Q: Private colleges and universities rely on money contributed by individuals and corporations for thei...

A: x=180.975  s=143.042 n = 8 

Q: A firm's marketing manager believes that total sales for the firm next year can be modeled using a n...

A: Given: x~N(μ,σ)μ=$2,500,000σ=$300,000

Q: Data on the weights​ (lb) of the contents of cans of diet soda versus the contents of cans of the re...

A: (a). Test whether the contents of cans of diet soda have weights with a mean that is less than the m...

Q: The following data contains regarding the preference in type of vehicle and gender.                S...

A: we are suppose to answer three sub parts .

Q: Qualitative data that cannot be ranked is called categorical, nominal 1. True 2. False

A: Nominal and ordinal data are part of the four data measurement scales in research and statistics, wi...

Q: Noel, a 35 year old office worker, has been struggling with his weight for a long time. He is lookin...

A: The normal probability is a type of continuous probability distribution that can take random values ...

Q: A paint manufacturer uses a machine to fill gallon cans with paint​ (1 gal=128 ​ounces). The manufac...

A: From the provided information, Population standard deviation (σ) = 0.79 Confidence level = 90% Margi...

Q: The following table displays the mathematics test scores for a random sample of college students, al...

A: Given: n=9

Q: In your own words, describe a situation that would require researchers to use a one-sample tt-test. ...

A: one sample t test if the sample size is <30  then we compare difference between true mean  t test...

Q: A certain digital music player randomly plays each of 10 songs.      Once a song is played, it is no...

A: A factorial is when we take a positive integer and find the product of all descendingpositive intege...

Q: In a 2017 survey was conducted on what was the best day of the week.  The result indicated that 90% ...

A: Margin of error is given by, And Confidence interval for this study,

Q: The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz...

A: The provided sample mean is Xˉ=11.7\bar X = 11.7 and the sample standard deviation is s=0.5s = 0.5, ...

Q: If the t values in the table for a t-test are ± 2.15 at alpha level 0.05, which of following compute...

A: Given : t value in the table for t-test = ±2.15 α = 0.05 Rejection criteria for the null hypothesis....

Q: Find the area under the standard normal curve a. to the right of z = 1.36 b. to the left of z = 1.97...

A: a. Area to the right of z = 1.36: Using standard normal table, the area under the standard normal cu...

Q: STD study: A 2008 CDC study estimated that 26% of young women between the ages of 14 and 19 in the U...

A: Given, Population proportion who are infected with at least one of the most common STD is P=26%=0.26...

Q: The probability distribution of the random variable X is shown in the accompanying table. - 5 P(X=x)...

A: The given data is discrete probability distribution. The variable X is random variable. The table ha...

Q: Calculate the standard error. May normality be assumed? (Round your answers to 4 decimal places.)  ...

A: Standard error is given by,

Q: A random sample of second year business students at a small Canadian university were polled by a res...

A: Let X be hours studying and Y be exam percentage. The least square regression equation is given as f...

Q: Consider the following. n = 5 measurements: 3, 2, 3, 5, 1 Calculate the sample variance, s2, using...

A: From the provided information, The sample size (n) = 5 The mean of the sample size can be obtained a...

Q: Use the value of the linear correlation coefficient to calculate the coefficient of determination, W...

A: Cofficient of determination = r^2                                                   = (0.746)^2     ...

Q: The following data represent the responses to two questions asked in a survey of 40 college students...

A:

Q: You want to estimate the percentage of statistics students who get grades of C or better. How many s...

A: Given, α=1-0.95=0.05M.E=0.02 In the absence of any preliminary information regarding the estimate of...

Q: 54% of students entering four-year colleges receive a degree within six years. Is this percent diffe...

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for yo...

Q: An employer claims that full time employees have a mean income of $35,000. A sample of 200 employees...

A: From the provided information, Sample size (n) = 200 Sample mean (x̅) = $34000 Population standard d...

Q: A recent national report states the marital status distribution of the male population age 18 or old...

A: Note: As per the guidelines, solution to 3 subparts have been given. Given information: Sample size ...

Q: I scored in the 98th percentile on an achievement test last year. The test scores were normally dist...

A: Solution: Let X be defined as the test scores on an achievement test. 98th percentile is the value f...

Q: A class contains 9 boys and 3 girls. (i) In how many ways can the teacher choose a committee of 4? (...

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

Q: A researcher obtains t = 1.923 for an independent-measures study using n= 15 participants in each sa...

A: Given, For a two-tailed test. t=1.923n=15 The degrees of freedom is obtained as- df=n-1=15-1=14 For ...

Q: It has been noted that the amount of time people spend shopping in supermarkets has decreaseddue to ...

A: a) Before pandemic frequency polygon : time frequency cumulative frequency 1-5 50 50 6-10 25 ...

Q: A random sample of 16 pharmacy customers showed the waiting times below (in minutes).  16 21 20 2...

A: First find the sample mean. Mean: Then, the standard deviation is,