Keep cool: Following are prices, in dollars, of a random sample of ten 7.5-cubic-foot refrigerators. A consumer organization reports that the mean price of 7.5-cubic-foot refrigerators is less than $355. Do the data provide convincing evidence of this claim? Use the a 0.10 level of significance and the P-value method with the TI-84 Plus calculator. Part 1 of 5 335 396 348 309 338 299 354 371 315 325 Following is a dotplot for these data. Is it reasonable to assume that the conditions for performing a hypothesis test are satisfled? Explain. Send data to Excel .. 250 300 350 400 The dotplot shows that there (Choose one) outliers. are The dotplot shows that there are no evidence of strong skewness. We (Choose one) assume that the population is approximately normal. It (Choose one) reasonable to assume that the conditions are satisfied.

Q: The Okeechobee County Health Department needs to estimate the proportion of all children in the coun...

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Q: 9. What is the area to the right of t = -2.093? A. 90 % C. 97.5 % B. 95% D. 99 % 10. What is the per...

A: here use t -distribution 

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Q: A. A researcher measures the amount of sugar in several cans of the same soda. The mean is 39.01 wit...

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Q: use the table provided in attachments. to test H0: u=100 versus h1 u not equal to 100, a simple ran...

A: From the provided information, Sample size (n) = 19 Sample mean (x̄) = 104.2 Standard deviation (s) ...

Q: patients revealed that 45 patients were misdiagnosed with indigestion instead of a heart attack. His...

A: Solution: Given information: p=7%= 7100=0.07q=1-p= 0.93x= 45n= 950p^= xn=45950=0.0474α=0.05  

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A: Here use given joint distribution of x and y 

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A: Given :  fitted regression line from the scatter plot is y=x-10  y =selling price of home  x=listed ...

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Q: Find the z-scores that separate the middle 91% of the distribution from the area in the tails of the...

A: Let Z denotes the standard normal distribution i.e N(0,1)

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Q: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval...

A: Given that  n=350 , X=161 Formula for confidence interval   C.I = (p  ±  √(p(1 - p)/n))

Q: Do the histogram

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Q: For #6 - #10: The results of a hypothesis test are reported as follows: t(15) = 2.70, p < .05. Based...

A: Given the results of a hypothesis test are given.  We have to find the sample size. 

Q: You measure 26 randomly selected textbooks' weights, and find they have a mean weight of 69 ounces. ...

A: Given that  x̄ = 69 , ? = 13.4 , n =26

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A:   Use EXCEL Procedure for finding the given values.   Follow the instruction to obtain the values:  ...

Q: 1,3,5,7,9   Find:  a. range b. mean and MAD c. variance d. standard deviation

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Q: ple defective. In a random sample of 120 items, the defect rate is 4.99%. At the 1% level significan...

A: Solution: Given information: n= 120 Sample size  p^= 0.0499 Sample proportion p= 0.04  Population pr...

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Q: The following results are from data where the dependent variable is the selling price of used cars, ...

A: Given Dependent variable of used car selling price Find If we wanted to test for heteroscedasticity,...

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A: Given: Sample size (n)=85Probability (p)=0.25 Here we use Normal approximation to binomial with corr...

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Q: 1. In a biomedical research study, it was determined that the survival time, in weeks, of an animal ...

A:

Q: You work for a marketing firm that has a large client in the automobile industry. You have been aske...

A: From the provided information, Confidence level = 95% Margin of error = 0.025

Q: The length of each of the following classes respectively is: Class A: [84.96 – 210.76] Class B: [8.5...

A: Given that  Class A (84.96  -  210.76) Class B ( 8.5 - 20.3 ) Class C (2.397 - 8.014)  

Q: You measure 43 backpacks' weights, and find they have a mean weight of 72 ounces. Assume the populat...

A: We have given that, Sample mean (x̄) = 72, population standard deviation (σ) = 11.7 and sample size ...

Q: Which of the following pairs are independent events

A: HERE USE , basic of independent events 

Q: survey, assume that 75% of the recent graduates annual salary exceeds $80000. Suppose you take a sim...

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Q: In a sample of 61 business trips taken by employees in the HR department, a company finds that the a...

A: Let µ1 denote the average amount spent on trips taken by the HR department and µ2 denote the average...

Q: A particular fruit's weights are normally distributed, with a mean of 299 grams and a standard devia...

A: Given that.   X~N( μ , ?^2 )   μ=299    , ?=8   , n=13   Z-score =( x - μ )/?

Q: 5) Suppose x is normally distributed with mean 100, and P(x < 90) = 0.4. What is P(90 < x < 110)? a)...

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Q: The formula A= 265e0039t models the population of a particular city, in thousands, t years after 199...

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Q: An experiment was conducted to determine whether giving candy to dining parties resulted in greater ...

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Q: A local non-profit group would like to estimate the proportion of residents of St. Lucie county who ...

A: Given that  p=19%=0.19 , q=1-p=1-0.19=0.81 Margin of error=E=0.056

Q: An executive believes that no more than 80% of the company’s employees take all of their vacation da...

A: An executive believes that no more than 80% of the company’s employees take all of their vacation da...