Suppose the mean height in inches of all 9th grade students at one high school is estimated. The population standard deviation is 5 inches. The heights of 8 randomly selected students are 75, 61, 75, 61, 60, 75, 70 and 65 x¯ = _____ Margin of error at 90% confidence level = ___ 90% confidence interval = [smaller value, larger value]

Q: The following results are for independent random samples taken from two populations. Sample 1 n₁ =…

A: Method: to find confidence intervals

Q: (d) below 18, and (e) below 4?

A: given datanormal distributionμ=17σ=5

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A:

Q: 8.43 Let Y₁, Y2,..., Y₁ denote a random sample of size n from a population with a uniform distri-…

A: Given Y~U(0,θ)

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A:

Q: K Do cars get better gas mileage with premium instead of regular unleaded gasoline? It might be…

A: To determine: How the experiment should be carried out.

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A:

Q: function f(x)=B³ Find the Maximum Likelihood Estimator of B. 00 elsewhere

A: Solution

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A: A hypothesis is any statement which may be rejected based on a certain set of evidences.   The…

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Q: Average wages of some firms are given below represent this by simple bar diagram Firm: Average wage…

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Q: Ho: H₂ μl μ2=0 μl! = µ2 (b) Assume that experience with the satisfaction rating scale indicates that…

A: Given n1=280, n2=300, level of significance ɑ=0.05  x̄1=83,  x̄2=82

Q: The heights of NBA players are normally distributed, with an average height of 6'7" (i.e. 79…

A: Given,mean(μ)=79 inchesstandard deviation(σ)=3×12+5=41 inches        since 1 feet=12 inchessample…

Q: Part 1 a. Use the multiplication rule to find ​P(WCC​), where C denotes a correct answer and W…

A: Given that  Number of questions = 3 Number of choices = 5 P(W) = 4/5 , P(C) = 1/5

Q: As the saying goes, any man should accomplish three things in his life: build a house, plant a tree,…

A: Given that: Sample proportion, p^=0.13 Margin of error, E=1% or 0.01

Q: Hypothesis: H0: Ud is greater than or equal to 0 Ha: Ud is less than 0 Decide if we reject H0 or…

A: From above output Lower 95% =-26.462  Upper 95% =-0.871

Q: a) Let X₁, X2,..., Xn denote a random sample from N(0, 2) distribution with probability density…

A:

Q: ment to suppliers of capital 4.payments to health c

A: Given, Question. Which one among these is not a loading factor in the case of health insurance? 1.…

Q: 1. A population is normally distributed with a mean of -30 (negative 30) and a standard deviation of…

A: 1. The mean is -30, and standard deviation is 4.

Q: (g) Above 95 (h) Below 95 (i) Above 83 (i)

A: Given that  Mean = 71 , Standard deviation = 12 Note : According to bartleby experts question…

Q: A random variable X has probability density function -Өх Oe , x > 0 9 f(x;0) It is desired to test…

A:

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

A: The proportion of sampled registered voters in rural Minnesota that voted in the 2016 president…

Q: The probability that an automobile needs an oil change is 43.77% and the probability that it needs a…

A: GivenP(automobile needs an oil change)=0.4377P(automobile needs a new oil filter)=0.4329

Q: If two events A and B with P(A) = 0.51, P(B) = 0.28 and P(A or B) = 0.79 then, A and B are

A: GivenP(A)=0.51P(B)=0.28P(A or B)=0.79

Q: A binomial experiment with probability of success =p0.5  and  =n5  trials are conducted. What is…

A:

Q: The Hawaiian alphabet consists of 7 consonants and 5 vowels. How many three-letter “words” are…

A: From given data : there is 7 consonants and 5 vowels

Q: Given P(A) = 0.7 and P(B) = 0.8. If P(A/B) = 0.3 find P(A and B).

A: Given that  P(A)=0.7 , P(B)=0.8 P(A/B)=0.3

Q: An airliner carries 100 passengers and has doors with a height of 78 in. Heights of men are normally…

A: a. Suppose a random variable x defines the height of men.

Q: The probability that a student chosen at random from your class is a French major is 0.05.…

A: Answer: From the given data, The probability that a student chosen at random from your class is a…

Q: H0: Ud is greater than or equal to 0 Ha: Ud is less than 0 Decide whether to reject H0 or not.…

A: Introduction: It is required to compare the mean sales of the two sales regions, SW and NE.

Q: The weights of 9-ounce bags of a particular brand of potato chips can be modeled by a normal…

A: Given: Mean μ = 9.12 Standard deviation σ = 0.05 Formula Used: X = μ+Zσ

Q: (d) Conduct a hypothesis test using a = 0.05. Calculate the test statistic. (Round your answer to…

A: It is given that the data of match samples from the two populations.

Q: According to the records of a soft drink company, the bottles for their one-liter-sized products…

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Q: You may need to use the appropriate technology to answer this question. The Global Business Travel…

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Q: (¹e, y>0 f(y) = (0, elsewhere And its cumulative distribution function is given by F(y) = y>0 0,…

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Q: what does the pharse "There are three kinds of lies: lies, damned lies, and statistics" mean

A: Here, the above phrase wrote by great statisticians Benjamin Disraeli and Mark Twain.

Q: What is the value of X + 2 for the scores 1, 3, 2, 4? 08 O 10 O 12 14

A: We have:-     Values of X  are 1,3,2,4 To find :-    Sum of all X's + 2  Method to find out:-…

Q: 2. Let X and Y be random variables. Prove that px,x| = 1 if and only if Y = a +bX for some a, b E R.

A: If Y= a+bX  ........(i) Then expected Value of Y:  E(Y)= a+bE(X) Multiply equation (i) by X. XY=…

Q: 3. The height of 7 male students in the class are: 66 71" 68 69" 75" 69 and 70". Assume the…

A: 3. Given The data is as follows: 66" 71" 68" 69" 75" 69" and 70" Sample size, n=7 Population mean of…

Q: c) A past dataset collected by statistics South Africa show that the money contributed by students…

A: Given that  n = 12 , S = 1.75 , σ = 1.40

Q: The time to complete an exam is approximately Normal with a mean of 43 minutes and a standard…

A: Given,mean(μ)=43standard deviation(σ)=5

Q: How can p<.05 be interpreted

A: Given that  p&lt;.05 Level of significance =0.05.

Q: The researcher found that the model’s effect size was very large where r = .325. Furthermore, r2 =…

A:

Q: Birthweights are distributed Normally, with a mean of 3.39kg and a standard deviation of 0.55kg.…

A: the probability that a randonly selected sample of 40 newborns will have an average weight  between…

Q: By rewriting the formula for the Multiplication Rule, you can write a formula for finding…

A: Answer: - Given, the probability that an airplane flight departs on time is P(A) = 0.91…

Q: For the following sample data, find M: 8 , 2, 2, 5, 3.

A: We have given that  8, 2, 2, 5, 3

Q: A study was undertaken to determine whether there was a significant weight (in lb) loss after one…

A: Given Subject x y 1 140 115 2 160 130 3 180 135 4 120 125 5 132 112 6 146 130 7…

Q: n a two-sample t test with sample sizes of 30 in each sample, there are 28 degrees of freedom…

A: Ans#- In a two-sample t-test with sample sizes of 30 in each sample, there are 28 degrees of…

Q: Assume that military aircraft use ejection seats designed for men weighing between 140.6 lb and 217…

A: Given mean of 177.1 lb standard deviation of 49.4 ​lb

Q: Sean flipped a coin 100 times and got heads 42 times. He concludes that the probability of g heads…

A: Sean flipped a coin 100 times and got heads 42 times. He concludes that the probability of getting…