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

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

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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