Please review Section 9.3. A survey of nonprofit organizations showed that online fundraising increased in the past year. Based on a randomsample of 54 nonprofit organizations, the mean one-time gift donation in the past year was $75 with a standard deviation of $20. If you testthe null hypothesis at the 0.01 level of significance, is there evidence that the mean one-time gift donation is greater than $70? Usetechnology to solve and include files and/or screen shots.a = 0.01H,:us70H, : µ> 70Find the test statistic:(Round to two decimal places as needed.)Find the p-value:(Round to two decimal places as needed.)State the conclusion:

Given X-bar=75 Standard deviation=20 n=54 N=70

Answered: Please review Section 9.3. A survey of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a certain suburb, the mean house price in 2009 was $ 225,000. A real estate agent believes that the mean house price in that suburb has increased since 2009. Please state the null and alternative hypothesis.
Part 3 a. Find the mean for percent of low-income working families and percent of 18–64-year-old with no HS diploma. Compare these two means. What do you observe? b. Find the standard deviation for each of these two groups. Which group has the larger variation? c. Construct the boxplots for each group. Attach a copy of the boxplot to the project Is there any outlier for each group? Find the value of Q1 for each group. Which group has the lower value of Q1? Data: percent of income working families | percent of 18-64 years old with no Hs diploma Alabama 37.3 15.3Alaska 25.9 8.6Arizona 38.9 14.8Arkansas 41.8 14California 34.3 17.6Colorado 127.6 10.1Connecticut 21.1 9.5Delaware 27.8 11.9District of Columbia 23.2 10.8Florida 37.3 13.1Georgia 36.6 14.9Hawaii 25.8 7.2Idaho 38.6 10.7Illinois 30.4 11.5Indiana 31.9 12.2Iowa 28.8 8.1Kansas 32 9.7Kentucky 34.1 13.6Louisiana 36.3 16.1Maine 30.4 7.1Maryland 19.5 9.7Massachusetts 20.1 9.1Michigan 31.6…
In a small company, the median salary is significantly lower than the mean salary. What does this indicate about the salary distribution in the company? What might be some possible reasons for this pattern?
60% of all the students passed an exam. If a random sample of 10 students is selected, What is the mean and the standard deviation ?
It is known that average house prices today is $371,040 higher compared to 10 years ago and median in the current time also $382,000 higher than house prices 10 years ago. Provide an interpretation of the change of mean and median based on the information above. Compare and contrast these values and comment on the distribution of the increases in house prices.
Suppose the average credit card debt for Americans is $7000 and is not normallydistributed with a standard deviation of $2400. If we sample 40 Americans, find the probabilitythat the sample mean of credit card debt is less than $6500.
An economist predicts that in the next 50 years gas will be 0.02 based on the last 7 months of 2015. What type of error did she make ? Extrapolation? Simpson’s paradox? Influential outlier? Volunteer sample?
An article in the San Jose Mercury News stated that students in the California state universitysystem take 4.25 years, on average, to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 64 students and obtain a sample mean of 4.5 with a sample standard deviation of 1.5. Do the data support your claim at the 1% level?
The Social Insight Test evaluates how accurately the subject appraises other people. From 500 people, scores were found to be normally distributed with a mean of 28 and a standard deviation of 6. About how many people got a score below 23?
Please review Section 9.2. A marketing researcher wants to estimate the mean amount spent per year ($) on a web site by membership member shoppers. Suppose a random sample of 100 membership member shoppers who recently made a purchase on the web site yielded a mean amount spent of $60 and a standard deviation of $56. Use technology to solve and include files and/or screen shots. Is there evidence that the population mean amount spent per year on the web site by membership member shoppers is different from $52? a =0.05 H:µ= 52 H : µ # 52 Identify the critical value(s): (Round to two decimal places as needed.) Determine the test statistic: (Round to two decimal places as needed.) State the conclusion:

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