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The poll claims that 70% of the population is for a new amendment. A random sample of 49 people showed that 27 voted in favor of the new amendment. Give a 95% confidence interval.
Give lower limit and upper limit accurate to four decimals; that is, 0.123545 or 12.345% would be entered 0.1235. the answers aren't 0.4108 & 0.6892 or 0.4217 or 0.6783)
question a random sample of song playing times in seconds is as follows 242 231 220 213 230 293q1. find the standard
For a normal distribution,
A pharmaceutical company has developed a drug that is expected to reduce hunger. To test the drug, three samples of rats are selected with n=10 in each sample.
Suppose that a study based on a sample from a targeted population shows that people at a pizza restaurant are hungrier than people at a coffee shop. Make an interference based on the results of the study.
Dunn Poitiac has compiled the following sales data regarding the number of cars sold over the past 60n selling days. Answer the following questions for the sales data shown.
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states.
Public transportation and the automobile are two methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Each day the major stock markets have a group of leading gainers in price (stocks that go up the most). On one day the standard deviation in the percent change for a sample of 10 NASDAQ leading gainers was 15.8.
Dr. Richmond, a psychologist, is studying the daytime television viewing habits of college students.
It was reported that approximately 45% of all university professors are extroverted. Suppose you have classes with 6 different professors.
She wants to be 90% confident and be accurate within 5% of the true proportion. Find out the minimum sample size necessary.
Do the data indicate that the sleeping pill is effective at a 1% level of significance?
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