4a. Suppose that 35% of senior citizens have a social media account. If we survey 150 senior citizens, what is the mea of the sampling distribution?

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A: Result Sum of relative frequency=1

Q: hundredth.) (b) If a family is selected at random, what is the probabilit that it generated less…

A: Given Data : Population Mean,μ = 17.8 Population Standard Deviation,σ = 3.9

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A: It is given that margin of error (E) is 0.045 and the confidence level is 0.90.

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A: Given n=100 P=0.3 X=40

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A: Mean is generally considered the best measure of central tendency and the most frequently used .

Q: a. A statistics class is made up of 18 men and 22 women. What percentage of the class is male? b. A…

A: We have to solve problems using formula  P(event) = no. Of favorable outcomes / total outcomes

Q: In the 2010 election in the UK 65.1% of registered voters voted. Suppose that a random sample of 200…

A: Solution-: Given: n=200, P=0.651 (or 65.1%) We want to find P[p^<0.60]=?

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

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A:

Q: Suppose that 16% of the population of the U.S. is left-handed. If a random sample of 175 people from…

A: Given n=175 P=0.16

Q: Suppose you take a sample of size 45 from a Normal distribution with unknown population mean and a…

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Q: The FBI wants to determine the effectiveness of their 10 most wanted list. To do so, they need to…

A: The following information has been provided: The sample size is n=531. The number of occurrences…

Q: or below the 8th grade level. In an early study the population proportion was estimated to be 0.21.…

A: Given : Margin of error: ME = 0.03 sample proportion: p̂ = 0.21

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A: The scores were normally distributed with mean 750 and standard deviation 95 μ=750σ=95 Z-score is…

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A:

Q: 1. a. Two fair dice are rolled at once. Let X denote the difference in the number of dots that…

A: A discrete random variable is a variable whose values can be obtained by counting. Though, the…

Q: (c) Using the 99 percent confidence interval, can we be 99 percent confident that is at least 50…

A: Since we only do up to three sub parts of a problem, we'll be doing the first three subparts only.…

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Q: analysis of the sample data revealed that the hippocampal volume is approximately normal with no…

A: Given data : sample size, n =24 sample mean, x̄ = 8.04 sample standard…

Q: A survey about timekeeping might divide the population by time zone, then take 100 random samples…

A: Solution: Stratified random sampling:  Stratified random sampling is a type of probability or random…

Q: 1. a. Two fair dice are rolled at once. Let X denote the difference in the number of dots that…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

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Q: A pack of cards contains 52 cards: 13 spades, 13 clubs, 13 hearts and 13 diamonds. Of the 52 cards,…

A: A pack of cards contains 52 cards: 13 spades, 13 clubs, 13 hearts and 13 diamonds. Of the 52 cards,…

Q: he data represent the​ time, in​ minutes, spent reading a political blog in a day. Construct a…

A: From the provided data points  The frequency distribution is  Class frequency (f) Midpoints  (x)…

Q: Y hav density function f(y) = determine E(Y) and E(Y²) П (атв) ya-ı Г(а) ГСВ) (тузатво yo

A:

Q: The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an…

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Q: When purchasing bulk orders of​ batteries, a toy manufacturer uses this acceptance sampling​ plan:…

A: Binomial distribution: The binomial distribution gives the probability of a number of successes out…

Q: A high school student kept track of the calorie content of all the snacks he ate for one week. He…

A: Given data indicates the calorie content of the snacks the student ate for one week. Sweet snacks -…

Q: Confidence Interval: You want to find a 93% confidence interval for the true proportion of…

A: Givenpopulation proportion(p)=0.06x=25n=345p^=xn=25345=0.0725Confidence level=93%

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A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: applicants to take the Medical College Admission Test (MCAT). Scores on the MCAT are…

A: Given Data : Population Mean,μ = 25 Population Standard Deviation,σ = 6.5

Q: Direction: Calculate Spearman's coefficient of rank correlation for the following. Describe the…

A: The question is about correlation Given : 1 )   2 )

Q: e) Consider the information given above. Suppose that the number 10 was observed on 26 occasions out…

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A: Devon observes the award labels on the wine bottles and then decides to buy them.

Q: the null hypothesis Ho and alternative hypothesis Ha. Calculate the standard error. Calculate the z…

A: Given : sample size, n = 50 sample mean, x̄ = 297.6 population standard…

Q: A soft drink machine outputs a made of 28 ounces per cup. The machines output is normally…

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Q: A student wishes to determine the average life-span of a household light bulb. She randomly collects…

A: Given: A student wishes to determine the average life span of a household light bulb  Randomly…

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Q: 4. Scatter plots and calculating correlation Suppose you are given the following five pairs of…

A: The scatter plot is,

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Q: Transcribed Image Text: The value x 56 should be used in the model to predict the revenue of Amazon…

A: Slope is the regression coefficient it used to predict the response variable over the unit increase.…

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Q: A. what is the critical t-stat? Remember to use alpha = 0.05 two-tailed. B.  so, is there a…

A: The objective is to conduct a repeated measures t-test to determine whether the dogs bark more often…

Q: 4-If P (A U B) = 0.64 and Event A and B are mutually exclusive, which of the following could be…

A: 4. P(A∪B)=0.64The events A and B are mutually…

Q: d. The standard deviation is c. The mean of this distribution is probability that the time will be…

A: Given X~U(3,38) Result: if X~U(a,b) Mean=E(X)=(a+b)/2 V(X)=(b-a)2/12 Note: According to Bartleby…

Q: A medical researcher wishes to see whether there is a relationship between a person’s age,…

A: Given data:   Age Cholesterol level Blood pressure Person 1 38 220 116 Person 2 41 225 120…

Q: b. The sample variance is an unbiased estimator of the population variance Is S² the MVUE of o2?…

A: b)Given that S2 is an unbiased estimator of population variance σ2.i.e., E( S2)=σ2Given that, Sample…