7. You want to estimate the mean weight loss of people one year after using the Atkins diet. How many dieters must be surveyed if we want to be 99% confident that the sample mean weight loss is within 0.50 lb of the true population mean? Assume that the population standard deviation is known to be 10.50 lb.

Q: b) Find P(-2.1 < Z < 2.4)

A: P(-2.1 &lt; Z &lt; 2.4) = ?

Q: At the 5% significance level, do the data provide sufficient evidence to conclude that the mean time…

A:

Q: Problem #2: Data from adoption studies on handedness indicate that the effects of shared biological…

A: (a) Null hypothesis: Alternative hypothesis:

Q: If X-bar = 75, Sigma = 10, and n = 49, and assuming that the population is normally distributed,…

A: The question is about confidence interval Given : Sample mean ( X¯ ) = 75 Popl. std. deviation ( σ )…

Q: A company produces a single product on three production lines that use different equipment. The…

A: The question is about two way anova with replications Given :   To find : Can it be conclude that…

Q: If 95% confidence interval of a population proportion is (0.64,0.84) Find the sample proportion?…

A: Answer: From the given data, 95% confidence interval of a population proportion is (0.64,0.84) Lower…

Q: Please find the critical values, the T value, the P value, and determine if you should reject or…

A: The data shows the old curriculum and new curriculum of third grade students.

Q: Determine the sample size n

A: Here confidence level = 90%  MOE = zc σn σ = 72 here for 90 %  confidence level , area in both tail…

Q: X is a Poisson random variable with mean 5. Find the probability p(x = 3)? Round your answer…

A: Answer: From the given data, X is a Poisson random variable with mean 5 X ~ Poisson (5) Mean μ = 5

Q: As many as 20% of all Americans contract influenza each year. A sample of 400 randomly selected…

A: The pis the proportion of all Americans who contract influenza each year p=0.20 The sample size is…

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A: Here ,  There are two categorical variables (Days per week spend exercising) &amp; (Gender)  Here…

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A: Here given different cases  for Random variable         NOTE- AS PER POLICY I HAVE CALCULATED FIRST…

Q: If one card is drawn from a well shuffled deck of 52 cards, What is the probability of getting a…

A: Answer: From the given data, Total number of cards in a deck = 52 Number of jokers in a deck = 2

Q: A poll reported 59% support for a statewide election with a margin of error of 4.37 percentage…

A: Estimated proportion ( p) = 0.59 Margin of error (E) = 0.0437 significance level (α)  = 0.01

Q: Find the regression​ equation, letting the first variable be the predictor​ (x) variable. Using the…

A: The first variable, which is the age of the Best Actress winner, will be considered as the predictor…

Q: The following dataset represents ten students, indicating the frequency of their absences from a…

A: The following dataset represents ten students, indicating the frequency of their absences from a…

Q: A simple random sample of 10 pages from a dictionary is obtained. The numbers of words defined on…

A: From the provided information, Sample size (n) = 10 Sample mean (x̅) = 54.8 Sample standard…

Q: Researchers conducted a study to determine whether magnets are effective in treating back pain. The…

A: From the provided information, n1=12x1=0.48s1=0.95n2=12x2=0.43s2=1.16

Q: You are investigating the relationship between the ages of U.S. adults and what aspect of career…

A: The following information has been provided: Observed Frequencies:   Learning new skills pay…

Q: How does the fuel consumption of a car change as its speed increases? The table presents data for a…

A: That is, there is no evidence to conclude that the there is a significant evidence of straight-line…

Q: A type I error A. arises when the false null hypothesis is not rejected. OB. is the rejection of a…

A: A type I error

Q: a. Give the mean and standard deviation of the (repeated) sampling distribution x. P= 0-5 (Type…

A: AS PER POLICY I HAVE CALCULATED 3 SUBPARTS plz REPOST for remaining  mean = 15  standard deviation…

Q: ported, based on over a million body temperature readings that healthy-adult body temperatures are…

A: X~N( μ , ?)   μ=98.6 , ?=0.6   Z-score =( x - μ )/?

Q: The dean of a major university claims that the mean time for students to earn a Master's degree is…

A: Given that, The dean of a major university claims that the mean number of hours students study at…

Q: 3. The number of pounds of steam used per month by a chemical plant is thought to be related to the…

A: The data for the steam usage(y) and the average temperature(x) are given.

Q: Question3.2 Suppose that U denotes the time it takes for Mike to prepare his breakfast on a random…

A: Question 3.2  Population mean μ=16, standard deviations σ=4.3

Q: A Gallup poll of 195,600 employees shows that 51% of them were actively searching for new jobs. Use…

A: n=195600, p^=51%, level of significance ɑ=0.01

Q: 1. For a fully discrete whole life insurance of 1 issued to (45) with annual level premiums, you are…

A: Given a fully discrete whole life insurance of 1 issued to (45) with annual level premiums with…

Q: The graph of the waiting time (in seconds) at a red light is shown below on the left with its mean…

A: n=225 mean=μ=19.3  σ=12.3

Q: What is the lower limit of the 99% confidence interval for a population variance when s=3 and n=20?

A: Standard deviation s=3 Sample size n =20 99% confidence level.  NOTE:- According to bartleby…

Q: What are the strengths of this pie chart?  What are its weaknesses?

A: W are given the pie-chart corresponding to a data set. The pie-chart is obtained to know the exact…

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A: Month Observed Frequency, Oi January 98 February 103 March 114 April 92 May 106 June 106…

Q: Suppose 55% of customers order a pizza. 72% order a drink, and 48% order both a pizza and a drink.…

A: P(A)=0.55 P(B)=0.72 P(A and B)=0.48

Q: Use the Standard Normal Table or technology to find the z-score that corresponds to the cumulative…

A: Suppose Z~N(0,1), then, we need to find the value of z for which ϕ(z)=0.6756

Q: that ​is, the probability that 20 or more vegans will come to the​ restaurant? Assume the vegans are…

A: Let X be the random variable that no. of vegans will come to the restaurant. Given that, X ~ bin (n…

Q: Compute the p-value. Round to three decimal places.

A: Given Information,: We have number of sample n= 2027  Number of favourable x= 485 number of people…

Q: If I were to calculate the z-score for your final grade in this class, which z-score would you least…

A: If I were to calculate the z-score for your final grade in this class, which z-score would you least…

Q: The degree of freedom for chi squared test of a contingency table, with 8 rows and 5 cohmns is..

A: Answer: From the given data, number of rows (r) = 8 number of columns(c) = 5

Q: If n = 230 and (p - hat )= 0.35, find the margin of error at a 98% confidence level

A: The question is about margin of erro Given : Sample size ( n ) = 230 Sample prop. ( p^ ) = 0.35…

Q: 4. Predict the global sales of video games using their North American sales, European sales, and…

A: The regression analysis to predict the global sales based on their North American sales, European…

Q: What is the standard deviation

A: Probability mass function of X  x 0 1 2 3 4 5 p(x) 0.017 0.098 0.258 0.341 0.226 0.060

Q: Construct a 99% confidence interval for the slope of the population regression line. Give your…

A: The least squares regression equation ŷ = 33.67 + 33.18x

Q: For each level of confidence c below, determine the corresponding normal confidence interval. Assume…

A: Here ,We will use the relation between width of confidence interval and confidence level. As…

Q: Part A (Introduction): a) Write an introduction: . Explain the problem in general (e.g., vitamin D…

A: Vitamin D is an important nutrient that is essential for healthy bones and teeth, as well as a…

Q: Calculate the mean and variance for the given data. 12,8,6,14,19 and 3.

A: Answer: From the given data, 12,8,6,14,19,3

Q: Please find the critical value(s), the T value, and the P value

A: The data shows the tensile strengths of the two treatments.

Q: You are testing Ho: P1 P2 vs. Ha: P1 P2. For Sample 1, the size is 800 and there are 64 successes.…

A: given data sample 1 : n1 = 800x1  = 64sample 2 :  n2  = 2400x2 = 49claim : p1 &lt; p2

Q: A local grocery store wants to estimate the mean daily number of gallons of milk sold to customers.…

A: population standard deviation(σ)=2.4 sample size(n)=60 Mean(x)=15.9

Q: A worker is reviewing his pay increases over the past several years. The table below shows the…

A: time t measured in years and beginning from 2000 t w 1 15.00 2 15.15 3 15.30 4 15.45

Q: Suppose that Y is a normally distributed random variable. Assuming that the data is randomly…

A: n=1225 Lower limit=1.006  Upper limit=1.194