The time spent by a teacher at work during spring holidays is normally distributed with a mean of 20 hours and a standard deviation of 5 hours. What amount of time do the top 25-percent teachers spend at work? O A: 23.4 B: 25.2 C. 26.4 OD: 22.6 OE: 24.2

Q: Question 8 Suppose you wish to test the hypothesis that the mean has increases (i.e the population…

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A: In above table  Given 95% CI for difference in mu men - mu women  (-10.67,-1.13)

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Q: he drug Ritalin is designed to stimulate the central nervous system. In a random sample of 252 boys…

A: Solution: Given information: n= 252 Sample size of boysx = 44 boys taking Ritalin p^= xn=44252=…

Q: . What was the population of the country during 2011?   a. 109,867,800 b. 109,323,900 c. 110,411,700…

A: Total population in 2010 = 108780000 Area = 300000 sq. Km Density (2010) = 362.6 km2

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A: Given: People who sustain a concussion or a traumatic brain injury (TBI) are likely to experience…

Q: Assume that both populations are normally distributed. a) Test whether u, >H2 at the a = 0.10 level…

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Q: 11.34 The comparison distribution: For each of the following situations, state whether the…

A: The objective is to find out which distribution is suitable for given different scenarios.

Q: A set of data was published in the fall 2019 Phi Kappa Phi Forum regarding the performance of Major…

A: Given  Level of significance ɑ=0.05, p value=0.015

Q: A random variable X has the probability distribution as follows: Find m. * 2 3 4 P(x) 1 m m 4 m 15…

A: Given x 1 2 3 4 5 P(x) 115 m15 m5 415 m15

Q: lomly selected a group rmation. Table 1 provie stions. ondent # How much a risk would do you thin…

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Q: A random sample of 50 students at a large high school resulted in a 95 percent confidence interval…

A: Given  95% CI for population mean are (6.73, 7.67) n=50

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A: Given as, Flight Capacity 40 Each ticket cost 4000 Flight Occupancy 95%

Q: You may need to use the appropriate appendix table or technology to answer this question. LSAT test…

A: Given that : μ = 153 ? = 9  By using standard normal distribution find P( x ≤ 135 ) = ????

Q: Please find your answer on the binomial table. At a local racetrack, each race has 5 horses.…

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Q: customers turn up only about 95% of the time. A flight can accommodate 40 passengers and each seat…

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Q: A food processing plant fills snack-sized bags of crackers. The mean number of crackers in each bag…

A: We have given that  Mean = 22 Standard deviation = 2 Sample size = 24

Q: A newsletter publisher believes that less than 65 % of their readers own a Rolls Royce. For…

A: From the provided information, A newsletter publisher believes that less than 65% of their readers…

Q: If n=14, (x-bar)-33, and s=9, find the margin of error at a 98% confidence level Give your answer to…

A: We have given that, Sample mean (x̄) = 33, standard deviation (s)= 9 and sample size (n) = 14  Then,…

Q: Brewed decaffeinated coffee contains some caffeine. We want to estimate the amount of caffeine in 8…

A: Mean = 9 Standard deviation = 2.3 Sample size = 9 significance level = 0.01 df = n-1    = 9 - 1 = 8…

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A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

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A: Given that A state fisheries commission wants to estimate the number of bass caught in a given lake…

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Q: The statistical hypothesis for a test on a mean is given below, along with the reduced difference…

A: From the above data The descriptive threshold is 0.0708

Q: Find the mean of the sampling distribution of sample means using the given information

A: We have given that  Mean, μ = 65 Standard deviation, σ = 12 Sample size, n = 16

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Q: For each situation, state the null and alternative hypotheses: (Type "mu" for the symbol u, e.g. mu…

A: From the provided information, Population mean (µ) = 6.5 Sample size (n) = 15 Sample mean (x̄) =…

Q: Here is a set of data. 50 205 208 218 221 229 254 477 547 654 670 777 890 910 958 970 Identify the 5…

A: Here we have to find dive number summary Given data is 50 205 208 218 221 229 254 477 547 654 670…

Q: 4. A company produces an electric toothbrush with a life (that time period for which it does not…

A:

Q: Consider the null hypothesis Ho : Data follows mixture model pN(41,1) + (1 – p) N (42, 4) vs H1 :…

A: Given that, Sample size n=152 Number of groups k=10

Q: Hand Written please.    Use the binomial table! You are randomly selecting a sample of 12…

A: Given that  Number of trials n=12 Success of probability p =0.70 X~binomial ( n, p)

Q: 90% confidence interval for a population mean is (65, 77). The population distribution is…

A: Given  90% confidence interval for a population mean is (65, 77). a simple random sample of 25…

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A: We have given that the sample size 102. Chi-Square test statistic = 27.99P-value is less than 0.001.

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A: 3) The hypothesized mean is 3.5.

Q: claim a random sample of N = 15 parts will be taken and if more than two defective parts are found

A: Given: sample size, n = 15 p = 10% = 0.10 x =2 more than two defective parts are found P(X > 2)

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A: Given Four hundred draws will be made at random with replacement from the box 1,3,5,7.

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A: A person can make a profit in one year is 2000000 with probability 0.4 and take a loss of 500000

Q: Find the probabilities and the expected frequencies for the following data according to the "Law of…

A:

Q: Q/ In the vehicle speed test, the results are given in the table below: Find 1. Arithmetic mean 2.…

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

Q: Hypotheses: H0:p=0.5H0:p=0.5 vs Ha:p≠0.5Ha:p≠⁢0.5; Sample data: p^=2840=0.70p^=2840=0.70 with n=40

A: Solution-: Given: n=40,x=28,P0=0.5 Hypothesis:               H0:p=P0=0.5  Vs H1:p≠0.5          (Two…