Question 5 You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 30 bacteria reveals a sample mean of i = 80 hours with a standard deviation of s 6.4 hours. You would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.4 hours at a 98% level of confidence. What sample size shouid you gather to achieve a 0.4 hour margin of error? Round your answer up to the nearest whole number. bacteria Question Help: Dvideo Submit Question

Q: Question 2. A survey from summer 2019 found that the average American adult spent 3.5 hours a day in…

A: Probability distribution

Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample…

A: Given that m.e =0.5 ,alpha =0.10 , s =6.8 n= ?

Q: Question #4 For students with last names beginning with P-T: Callahan (2009) demonstrated that tai…

A: 1. Null and alternate hypothesis is given by- H0:μ=0Ha:μ≠0Level of significance=0.05 Test of…

Q: A local church parish wants to raise money to add to their campus. In a sample from a previous fund…

A:

Q: QUESTION # 1. The measured voltage amounts from a sample of 27 households have a mean of 123.59…

A: It is given that the mean of measured voltage is 123.59, standard deviation is 1.38 and the sample…

Q: An independent knowledge, attitudes and practices survey on COFLU-20 was conducted in a large…

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Q: Question 4 According to a college survey, 67% of all students work full time. Find the standard…

A: As per our guidelines, we can solve only the first question. Kindly, repost the other for an answer.

Q: QUESTION 40 A randomized controlled trial is run to evaluate the effectiveness of a new drug for…

A: From the given information,A total of 250 children randomized, per each group 125.For a group one…

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Q: Compute the z score value for a score of 85 on a test which has a mean of 75 and a standard…

A: Given:  Random score x with mean mu=75 and standard deviations σ=5  To find Z score of random score…

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A:

Q: Question 17 > You are a researcher studying the lifespan of a certain species of bacteria. A…

A:

Q: A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: We have to find probability corresponding to sample mean ( x¯ ) So we have to use sampling…

Q: Suppose that when a Honda dealership sells a Honda Accord, the profit the dealership makes is…

A: Given , Mean = 1200 , Sigma = 350 X ~ N(0,1)

Q: Calculate a 90% CI for the average GPA of college students from a sample of 49 students with a mean…

A: From the provided information, Population standard deviation (σ) = 0.1 Sample size (n) = 49 Sample…

Q: Question 4. Suppose the mean weight of King Penguins found in an Antarctic colony last year was 15.4…

A: Given n=35 x=14.6σ=2.5μ=15.4α=0.01

Q: Question 4 You have taken 10 observations from normally distributed data that is known to have a…

A: Given data: Population standard deviation = 1 Sample size = 10 Sample mean = 32 To calculate  the…

Q: QUESTION 2 a) Measurements of the length of a random sample of 200 rods made by a certain machine…

A: The given frequency distribution table is Classes Frequencies 60-62 5 63-65 18 66-68 42…

Q: QUESTION 15 A researcher suspects the mean trough (the lowest dosage of medication required to see…

A: we have given that  n=93 , xbar=6.1 ,sigma=2.4 and mu=3.7 ,level of significance alpha=1%=0.01

Q: • Question 13 It is commonly believed that the mean body temperature of a healthy adult is 98.6° F.…

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Q: Many medical professionals believe that eating too much red meat increases the risk of heart disease…

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Q: When testing (at the 5% level of significance) whether the proportionof peole who are contributing…

A: Test is that whether  the proportionof peole who are contributing has increased. For previous…

Q: QUESTION 15 A certain machine makes electrical resistors having a mean resistance of 50 ohms and a…

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Q: QUESTION 7 You interview a sample of 100 employees who have left the company. You want to estimate,…

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Q: QUESTION 5 A sample of 60 mutual funds was taken and the mean return in the sample was 13% with a…

A: Given  n=60 , Mean=Xbar=13% , Standard deviation=sigma=6.9% mu=11.5% Test statistics =1.68 Critical…

Q: QUESTION 14 he monthly starting salaries of Junior partners in a large Fortune 500 company have a…

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Q: Question 6 Suppose a Pharmaceutical company manufactures a specific drug and needs to perform some…

A: Hypothesis Testing: Hypothesis testing is a statistical inference technique that uses sample data…

Q: Question 9 The systolic blood pressure of adults in the USA is nearly normally distributed with a…

A:

Q: The number of gallons of paint that Home Depot sells in a given day is normally distributed with a…

A: Given information- Population mean, µ = 218 gallons Population standard deviation, σ = 37 gallons We…

Q: An insurance company wants to know if the average speed at which men drive cars is greater than that…

A: Given : For Sample 1 x̄1 = 70.0 s1 = 3.2 n1 = 25 For Sample 2 x̄2 =…

Q: question 17 part 2 The amount of coffee that people drink per day is normally distributed with a…

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Q: A local church parish wants to raise money to add to their campus. In a sample from a previous fund…

A: We have find contributions.

Q: Question 6 > You are interested in estimating the the mean lifespan of a cell phone. From past data,…

A: Method are defined in the solution

Q: Question 4 (a) The mean lifetime of 200 mobile phones in a sample is 1,000 hours and their standard…

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Q: QUESTION 7 Nabisco claims that Chip Ahoy Cookies have an x=28.67 per cookie with a SD=2.67. Assuming…

A: According to our policy we can answer only first question for remaining please repost the question.

Q: An independent knowledge, attitudes and practices survey on COFLU-20 was conducted in a large…

A:

Q: QUESTION 6 The temperature readings for 20 spring days in Manila are normally distributed with a…

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Q: Question 10: The distribution of waiting times at the student health center is bell-shaped with a…

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Q: Question 4 a) A medical researcher wants to investigate the amount of time it takes for patients'…

A: Given data: a). Population standard deviation = 25 Margin of error = 5 minutes Confidence level =…

Q: Question 7 The average monthly rainfall in Southern Ontario is 26 mm. If rainfall data over the year…

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Q: During 2008, college work-study students earned a mean of $1478. Assume that a sample consisting of…

A: Hypothesis: H0:μ=1478H1:μ>1478 This is a right tailed test since the claim is to check that…

Q: A survey of 88 men found that an average amount spent on St. Patrick's day of $60 with a standard…

A: The sample sizes are 88 and 86.

Q: Question 4 A statistician employed by a consumer testing organization reports that at 95% confidence…

A: Given Information : Confidence level , c = 95% ( 0.95) Population Standard deviation , σ = 1.25…

Q: QUESTION 4 A recent salary survey at a large multinational corporation was carried out. Analysis of…

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Q: QUESTION 20 The manager of a paint store, wants to estimate the mean amount of a product sold per…

A: We want to find the lower confidence limit of 92% confidence interval

Q: Question 1: a) A medical researcher wants to investigate the amount of time it takes for patients'…

A: a. The critical value for Zα = 0.05 is obtained below Here, confidence level is 0.95. For 1 - α =…

Q: Question 4 a) Teens are reported to watch the fewest total hours of television per week of all the…

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Q: According to ongoing clinical research into feline health, the weight of an obese adult male…

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Q: Question 3 Two methods have been developed to determine the nickel content of steel. In a sample of…

A: Given information: For the first sample: n1=5, x¯=3.16 and sx=0.042. For the second sample: n2=5,…