21 Suppose it is known that 40% of Americans own an iPhone. If a random sample of 60 Americans were surveyed, what is the probability that the proportion of the sample who owned an iPhone is between 45% and 50%.

Q: You wish to test the following claim (Ha) at a significance level of a=0.10. Ho:μ = 76.3 Ha:μ < 76.3…

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Q: What is the P VALUE? H(0) P= .68 H(A) P> .68 Sample size of 46.  63 People were surveyed. 48…

A: Given: X = 48 n = 63 P = 0.68 Formula Used: p-value = P(Z≥z) Z = p^-PP(1-P)n p^ = Xn

Q: The number of calls that a call center gets in an hour is a Poisson random variable. The phone…

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Q: The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population…

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Q: Find the variance for a Bernoulli distribution whose parameter is 0 = 0.81. Your answer should be to…

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Q: The time required to assemble an electronic component is normally distributed with a mean and a…

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Q: In a recent poll of 2,500 homeowners in the United States, one in two homeowners reports having a…

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Q: A standard deck of cards is being used to play a game. There are four suits (hearts, diamonds,…

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Q: b) exactly 5 graduates will work long, hard hours on the job?

A: Ans: option 1  From given data we have: p=90%=0.90n=10

Q: Q18. Why do we conduct post hoc analysis in ANOVA? a. To make a comparison on individual adjusted…

A: ANOVA: Analysis of variance is used to check whether the means of three or more populations are…

Q: The U.S. Fish and Wildlife Service reported that the lengths of six-year-old rainbow trout in the…

A: Let X denote the lengths of six-year-old rainbow trout in the Arolik River in Alaska are normally…

Q: A newspaper in a large Midwestern city reported that the National Association of Realtors said that…

A: Givensample size(n)=63Mean(x)=118900standard deviation(σ)=3700significance level(α)=0.05

Q: The standard deviation of a sample is directly proportional to the square root of its sample. a.…

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Q: Three people get into an empty elevator at the first floor of a building that has 7 floors. Each…

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Q: A survey of an urban university showed that 820 of 1,140 students sampled supported a fee increase…

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Q: Single Americans In a recent year, about  22%  of Americans  16  years and older are single. What…

A: It is given that n=210 and p=0.22.

Q: 1. The following measurements of the specific he were made in order to investigate the variatio…

A: The given data is Temperature(x) Specific heat(y) 0 0.51 10 0.55 20 0.57 30 0.59 40…

Q: Test the pair of events A and F for independence based on the following table. A B C Total 0.14 0.04…

A: From the given table we know that ,P(A)=0.40P(F)=0.60P(A∩F)=0.22

Q: Tourism is extremely important to the economy of Florida. Hotel occupancy is an often-reported…

A: Answers are in images uploaded below and calculation of p value is explained in last step. Thanks!

Q: Suppose that one in six smartphone users have fallen prey to cyber-attack. We use a sample of 200…

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Q: Statistics students in Oxnard College sampled 10 textbooks in the Condor bookstore and recorded the…

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Q: The probability that stock A will rise in price is 0.63 and that stock B will rise in price is 0.37.…

A: V

Q: What does the residual plot tells about the linear regression model? Residual 20 10 -10 -20 20 30…

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Q: QUESTION 15 What is the median of the distribution below? 1,2,4,4,5,6,7,8,8,9 a. 4.5 Ob.6 O c. 5…

A: Median: The median is an indicator of central tendency along with average (or mean) and mode.…

Q: The term test scores of 15 students enrolled in a Business statistics class were recorded in…

A: Given data: 4, 7, 7, 9, 10, 11, 13, 15, 15, 15, 17, 17, 19, 19, 20. After calculating the mean,…

Q: A normal random variable x has an unknown mean and standard deviation. The probability that x…

A: Given that A normal random variable x has an unknown mean and standard deviation. The probability…

Q: nces. Do married couples choose similar or different personality types in their mates? The following…

A: Number of Similar Preferences     Number of Married Couples All four 25 Three 126 Two 125…

Q: What is the probability that the wages for a sample of 20 receptionists are less than $8/hour?

A: From given data we have: Mean μ=10.38, Standard deviation σ=2.05, n=20.

Q: A sample of size 86 will be drawn from a population with mean 90 and standard deviation 24. Use the…

A: Solution:- from given information sample size n=86  mean μ=90Standard deviation σ=24

Q: Directions. Given the value of r, describe the relationship in terms of strength and direction. 1. r…

A: As we know that correlation between two variables define the strength and the direction of the…

Q: Q17. What type of estimation that surrounds the point estimate with a margin of error to create a…

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Q: A student discovers that his grade on a recent test was the 72 nd percentile. If 90 students wrote…

A: Hi there! Since there are multiple questions, we will solve one question for you. To get remaining…

Q: hypothesis testing if the null hypothesis is rejected, a. no conclusions can be drawn from the test…

A: We have given that,  In hypothesis testing if the bull hypothesis is rejected? Then,  We have to…

Q: If y=3.2-7.9x, the correlation between x and y must be negative. Select one: O True False

A: It is given that  y^ = 3.2 - 7.9x

Q: So what are the critical value(s) is/are  (If there are two critical values separate each with a…

A: The test is left tailed test.

Q: Σ (xy- x) = c Σ ( − x) +r 2 G + = 1 i=1 j=1 1₁ 1

A: ANOVA Model for 2-way classified data with m observations An estimate to test for the interaction…

Q: A university surveyed recent graduates of the English department for their starting salaries. One…

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Q: The pulse rates of 164 randomly selected adult males vary from a low of 39 bpm to a high of 115 bpm.…

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Q: If a variable is normally distributed with a mean of 30 and a standard deviation of 6, what is the…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: Directions. Test the significance of the following correlation coefficients. 3. -0.58 4. 0.63 5.…

A: To test the significance of the correlation, we state hypothesis.  H0: There is no significant…

Q: Nolan hopes to determine the difference in the proportion of males and females who play video games…

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Q: A 28-year-old man pays $200 for a one-year life insurance policy with coverage of $174787. If the…

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Q: critical region is (the area in the tails beyond each z scored or the area between the z scores) 2)…

A: A critical value divides the distribution into two regions i.e., rejection (critical) region and the…

Q: The following shows incomplete ANOVA output: ANOVA Regression Residual Total Calculate: P= 1 df 1 8…

A: Given that  dfRegression = 1 , dfResidual = 8 , dfTotal = 9 SSTotal = 2335 , MSResidual = 140.1…

Q: A bond pays a return (simple interest) of 5% and has a default rate of 3%. This bond is purchased…

A: default rate is 3% but pays a return of 5% Therefore, expected rate of return=5100×1000…

Q: Answer the following to summarize the test of the hypothesis that there is no dependence between the…

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Q: Two of the five (5) foreign automobiles from an overseas shipment have slight paint blemishes. If an…

A: From given data: Total no. of automobiles =5 B=blemished  N=Non-blemished There is 7, not 8 elements…

Q: Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has…

A: Given data  Mean=90 SD=14 n=130 P(88&lt;X&lt;92)=P(88-90/14/√130&lt;X&lt;92-      90/14/√130)…

Q: Find the probability distribution for Y. The table for the probability distribution of Y may have…

A: Here, Y = X^2 + 1

Q: d stuff but how d

A: x is a random variable with the given following function f(x) = 1/4 (x+1); 0&lt;x&lt;20;  elsewhere…