A librarian believes that most books are kept longer or shorter than the allowed time of 3 weeks. What is the alternative hypothesis?(THE AVERAGE TIME A BOOK IS KEPT 3WEEKS,  IS DIFFERENT FROM 3,  WEEKS, LONGER THEN 3 WEEKS) What is the null hypothesis?( AVERAGE TIME KEPT, DIFFERENT OR  LONGER_

Q: Chicken farming is a multi-billion dollar industry, and any methods that increase the growth rate of…

A: The formula of the standard error of the point estimate for the difference is,

Q: In a certain​ city, projections for the next year indicate there is a​ 20% chance that electronics…

A: Explanation:The probability of electronics jobs increasing by 1,000 is 20% or 0.2.The probability of…

Q: What is the point of the ‘Exploration’ phase? What is the difference between  ‘Exploration’ and the…

A: Exploratory research helps you to gain more understanding of a topic.  It helps to gather…

Q: In 2017, the entire fleet of light-duty vehicles sold in the United States by each manufacturer must…

A: The given data is as follows:Population mean, Population standard deviation,

Q: t does a z-score of -3.8 mean

A: A z-score is known as the standard score that determines how much the data point deviates from the…

Q: So the Probability of the athlete beating a hill time of 2.27 seconds on 4 or more of the 10 gate…

A:

Q: Battery life is an important issue for many smartphone owners. Public health studies have examined…

A: From the provided information, The data values are as follow: Primary use: Talking 35.8 22.2 24.0…

Q: A school district official intends to use the mean of a random sample of 125 sixth graders to…

A:

Q: a) Choose an appropriate test procedure and write that procedure here. b) State any assumptions or…

A: u = 96 xbar = 100.55 s = 6.34 n = 36

Q: The "Jupiter Bar" is a candy bar that is only manufactured and sold in one size. Tens of thousands…

A: Given Information :  The "Jupiter Bar" is a candy bar that is only manufactured and sold in one…

Q: Juan is in his first semester at a university and is taking a calculus course with a large…

A: given data  mean of exam (μ) = 83standard deviation (σ) = 9for juan score(x) = 57Z score =?

Q: Assume that half the population is vegetarian so that the chance of an individual being a vegetarian…

A:

Q: a. Formulate hypotheses about the two population variances that can be used to determine whether the…

A: a) Null and Alternative Hypotheses The following null and alternative hypotheses need to be tested:…

Q: Describe about the difference between population means>

A: Assuming that we are comparing the difference between two population means which are defined as The…

Q: An experiment was conducted to study the effect of temperature and type of oven on the life of the…

A: The objective of this question is to determine the number of treatments in the experiment and…

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A: To find the p-value, we have to calculate the test-statistic first.  The z test statistic for…

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A: It is tested that the mean child mortality rate for countries in Eastern Europe is more than the…

Q: part 2

A:

Q: Describe one-tailed p-values.

A: The choice of a specific value of the level of significance is completely subjective and hence the…

Q: SAT or ACT? Each year thousands of high schoolstudents take either the SAT or the ACT,…

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Q: You are to pick 4 numbers from 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 such that the 4 numbers…

A:

Q: How to find the weighted mean of three models

A: The weighted mean is given by the following formula

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Q: What are the rules for deteriming significant digits?

A: The rules for determining significant digits are:1. All non-zero numbers are significant   eg: The…

Q: The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher 20 25…

A: The median is middle value of the observations, above or below which 50% of the observations lie.

Q: suppose you have two numbers with variance 9. what is the range of the this set

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Q: What is the predicted suicide rate per 100000 people ?

A:

Q: If you're working with this set of deviations: -7, -2, +3, +2, +4 What is the sum of the squared…

A:

Q: 3) Try to show the Women's Post-Med blood pressure population standard deviation is less than 11?…

A: It is required to test whether the population standard deviation of Women's Post-Med BP σ is less…