How do you write a research questionnaire?

Q: (a) Is there evidence to support the claim that battery life exceeds 40 hours? Use a = 0.010. The ba...

A: Here AS per policy I have calculated 3 subparts kindly REPOST for remaining  Here given sample size ...

Q: The probability that a football game will go into overtime is 20%. What is the probability that exac...

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Q: Using the following data Xi Yi 1 3 2 7 3 5 4 11 5 14 Compute the estimated standard deviation of b1...

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Q: Find the probability of z occurring in the indicated region of the standard normal distribution. Cli...

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Q: A manufacturer of apple phone charges claims that only 4% of his production is  defective. In a rand...

A: Lep p be the population proportion  n be the size of the sample  p^ be the sample proportion  Given ...

Q: The prime Minister of a small Caribbean Island stated that 95% of the population was vaccinated from...

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Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe t...

A: Given,standard deviation(σ)=23.8margin of error(E)=2.5α=1-0.90=0.1α2=0.05Z0.05=1.645        (from Z-...

Q: 15. Twenty seeds were sown in each of 100 trays and the number of seeds that germinated was recorded...

A: For the given data Find (a) compute mean =?median =? mode =? (b) which would be best average ?

Q: ntroduction on Covid 19 paragraph form please. please help with research question in introduction R...

A: Coronaviridae is a family of viruses with a positive-sense RNA that possess an outer viral coat. Whe...

Q: Find the probability that when a couple had six children, at least one of them is a boy. (Assume tha...

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Q: 13. The weights of 7 boys and 13 girls were measured. It was found that the mean wight of the boys w...

A: Given that boys -- n= 7 , mean =58.1 girls --n=13 , mean =62.7 mean weight of whole group =?

Q: researcher wants to know how long it takes, on average, for a certain species of bacteria to divide....

A: We have given that data  6.7, 10.5, 4.8, 5.2, 5.2, 10.6, 4.4, 5.7, 10.9, 7.5, 5.3, 4.4, 5.7, 5.2, 6....

Q: What is the Cramer Rao lower bound and why is it important?

A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, as per th...

Q: If the correlation coefficient is –1, which answer is correct? Group of answer choices The slope of...

A: It is given that  Correlation coefficient = -1

Q: 1 By how many times does the sample size have to be increased to decrease the margin of error by a f...

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Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children ar...

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Q: Ninety-four percent of Washington community college transfers feel that their community college adeq...

A: Given that probability of success, p = 94% or 0.94. Number of samples,n = 14. This can be represente...

Q: Days Sick Monday 330 Tuesday 280 Wednesday 330 Thursday 300 Friday 290 Saturday 295 The...

A: It is needed to test, whether the daily sick leave usage is consistent (equal).

Q: Suppose you pay $500 per year to insure your car worth $10,000. The probability that you get in an a...

A: Expected value of the insurance will be, E(X)= (The amount your car worth)*(probability that you get...

Q: Below is a probability distribution for the number of math failures of BC students. 1 3 4 P(X) .41 ....

A: We know that  ∑P(x) = 1  First we want to find missing probability from above equation.  NOTE:- Acco...

Q: The table  shows the probability distribution of the discrete random variable X Find the value of p...

A: X 2 3 4 5 6 7 P(X=x) p 2 p p 2 p 3 p p

Q: ALPHA = 0.05             Shift       1 2 3   Machine A 10 7 9   B 10 7 6   C...

A: Introduction: It is of interest to test whether the machines and shifts are operating consistently, ...

Q: Consider the following time series data. 34 : Week 1 2 5 6 Value 18 14 15 12 18 14 Using the average...

A: a) 2.66   b)8.59    c)28.77%   d) 15.17

Q: At a competitive examination at which 600 graduates appeared boys outnumbered girls by 96. Those qua...

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Q: An article in Radio Engineering and Electronic Physics (1980, Vol. 25, pp. 74-79) investigated the b...

A: Given that, Sample size, n1=n2= 100 Mean1, x̄1= 7.9 And standard deviation, s1= 2.6 Mean2, x̄2= 6.9 ...

Q: To assess whether two factors are independent or not, you can apply the test of independence that us...

A: Solution-: As below we fill up given sentence with group of answer choices To assess whether two fac...

Q: Approximately _% of the area under the normal curve is between u- o and u+ o. 95 68 50 99.7 O O O O

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Q: From the following data calculate (i) Correlation coefficient (ü) Standard Deviation of Y (Gy) X=85 ...

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Q: Individual Experience Experience of Others Combination 24.5 20.6 21.0 ...

A: For the given data Perform Anova one way test to  test the claim that errors are equal.

Q: Given the following data, find frequencies of () the remaining positive classes, and (i) ultimate cl...

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Q: Hyunjin is a famous model and has great taste in clothes. His mom ask him to pick any  jacket, shirt...

A: Given : No. of shirts = 8 No. of Jackets = 3 No. of shorts = 5  

Q: "An electrical firm manufactures light bulbs that have a length of life that is approximately normal...

A: Given,mean(μ)=800standard deviation(σ)=100sample size(n)=29

Q: Susan, a personal trainer, was interested in whether or not there was a linear relationship between ...

A: For the given data Is the correlation coefficient significant?

Q: Compute Karl Pearson's coefficient of correlation in the following series relating to cost of living...

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Q: "What is the correlation coefficient for this condition? X is the temperature in Mars, Y is the heig...

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Q: Some people have the misconception that z-scoring "makes the data gaussian." Describe some data that...

A: A z-score is a standardized score which tells how far from the mean an observation lies. Z=X-μσwhere...

Q: Based on data from the 2000 Census the average age of a Baldwin County, Alabama resident is 39 years...

A: We have given that  Population mean =39 Population standard deviation =22.6

Q: Calculate the coefficient of skewness for the following distribution of daily wages in a manufacturi...

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Q: Is there a relation between the age difference between husband/wives and the percent of a country th...

A: Since, you have posted a question with multiple sub-parts, as per our guidelines, we have provided a...

Q: A company earns an average of 15 customers per day. What is the probability that the company will re...

A: Givenan average of 15 customers per day λ=15Let "x" be that the company receives cutomers per dayx~p...

Q: Suppose that the distribution of scores on the Graduate Record Exam (GRE) is approximately normal, w...

A: a. Consider that the mean and standard deviation of a random variable X are µ and σ, respectively. T...

Q: The following data represent the concentration of dissolved organic carbon​ (mg/L) collected from 20...

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Q: Problem 13 : Find mean for the following data : Class interval 50--59 40-49 30-39 20-29 10-19 0-9 Fr...

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Q: Determine the sample size of a research on: ( 25%) a.) 1,529 freshmen at 95% accuracy ( 5% error). b...

A: Note: As per the guidelines, answer to first three subparts will be provided. Ask other subparts as ...

Q: "An electrical firm manufactures light bulbs that have a length of life that is approximately normal...

A: Given data,Mean μ=843sd    σ=35n=31Find mean of sampling distribution?

Q: At a competitive examination at which 600 graduates appeared boys outnumbered girls by 96. Those qua...

A: Given that  600 graduates appeared boys outnumbered girls by 96. Those qualifying for interview exce...

Q: A biased coin is red on one side and black on tbe other. The probability of throwing red is 0.78. In...

A: As per Bartleby guidelines I can't answer more than one question per post. Please post other questi...

Q: A Gallup survey based on telephone and face-to-face interviews with 4,220 adults in China, aged 15 a...

A: We have given that  Sample size n =4220 Sample proportion p^=30%=0.30 Margin of error =E =2.4%=0.024

Q: (a). Find the value of ß that makes fx(r) a valid pdf. (b) Find the edf for the random variable X. (...

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Q: With Trusted Not Trusted Total Oxytocin 40 20 60 No Oxytocin 22 18 40 Total 62 38 100 The Bayes fact...

A: we will calculate the bayes factor using odds ratio