11/11/21

Which of the three conclusions is best if H0 is rejected? (I) (II) (III)

: Scores on a certain IQ test are known to have a mean of 100. A random sample of 31 students attend a series of coaching classes before taking the test. Let μ be the population mean IQ score that... more

06/22/21

Your sample consists of 126 subjects, with 52 successes. Calculate the test statistic, rounded to 2 decimal place

Testing:H0:p=0.42H1:p<0.42Your sample consists of 126 subjects, with 52 successes. Calculate the test statistic, rounded to 2 decimal places

05/23/21

the probability of this?

What is the probability that a randomly chosen person has an IQ over 120?(IQ scores are normally distributed with a mean of 100 and standard deviation of 15).

05/20/21

statistics question

If n=16, ¯x(x-bar)=36, and s=12, construct a confidence interval at a 95% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal... more

05/19/21

Really need help with this question!

1.a company manufactures batteries in batches of 18 and there is a3 percent defect ratewhy is this a binomial distribution please explain!

05/18/21

A data set with a mean of 34 and a standard deviation of 2.5 is normally distributed. Use this information for items 1-3.

According to the Empirical Rule, what percent of the data is between 34 and 39? Round to the nearest tenth of a percent. What data value is greater than approximately 80% of the distribution? A:... more

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