a. Average / Mean b. Mean +_ 1 standard deviation c. Mean +-2 standard deviation d. Mode e. Median

a. Average / Mean b. Mean +_ 1 standard deviation c. Mean +-2 standard deviation d. Mode e. Median

In a random sample of 40 refrigerators the mean cost was 125 and the population standard deviation is 18.70. A 95% confidence interval for the population mean repair cost (119.20,130.80). Change the...

a barrel contains 7 yellow balls, 3 green balls, 11 white balls, 5 red balls and 4 orange balls. What is the probability of choosing 2 white balls and 3 red balls?

i have the answer. I just need a second opinion to do it and see if i gt the same answer as them

1. Translate the statement into a confidence interval for p. 2. Approximate the level of confidence. In a survey of 8451 U.S. adults, 31.4% said they were taking vitamin E as a supplement...

A carpet expert believes that 7% of Persian carpets are defective. If the expert is accurate, what is the probability that the proportion of defective in a sample of 574 Persian carpets would be greater...

the sample standard deviation of the sale price of 12 randomly selected three year old chevy corvettes is $2615.19. Construct and interpret a 90% confidence interval for the population standard...

A study of PSA blood test for diagnosing prostate cancer in men used a sample of 2620 men in the Albuquerque metropolitan area, who were 40 years of age and older that represent a variety of ethnic...

An interactive poll found that 362 of 2,243 adults aged 18 or older have at least one tattoo. (a) Obtain a point estimate for the proportion of adults who have at least one tattoo. (b) Construct...

I don't understand how you do this math problem.

Local health authorities are concerned that the hectic pace in their city has elevated the stress, and thus the blood pressure of women. The authorities have decided to study this issue by measuring...

On a comparison test of 3 brands (Brand A, B, C) among 200 people Brand A (the focus) has their product evaluated in either first or second position among the 200 people. The test only compared two...

In a clinical study of an allergy drug, 108 of the 200 subjects reported experiencing significant relief from their symptoms. Test the claim that more than half of all those using the drug experience...

A random sample of 39 cows was fed a special high-protein grain for a month. Each was weighed before and after and the average weight gained was 6.7 pounds, with standard deviation 7.1. i...

PLEASE HELP ME The Boston Fire Department receives 911 calls at a mean rate of 1.6 calls per hour (Mass.gov website, November 2012). Suppose the number of calls per hour follows a Poisson...

True or False. If you have a volunteer sample instead of a random sample, then a confidence interval for population proportion parameter is still completely reliable as long as the sample size is...

True or False. As sample size increses, the law of large numbers guarantees the convergence of a statistic at the population parameter value

True or False. Random assignment of subjects to treatments in a statistical experiment guarantees a causal interpretation of the results.

If female blood pressure is normally distributed with a mean of 114 and standard deviation of 19.8, find p12 and p77

A population is formed my placing 5 balls labelled 1,2,3,4 and 5 respectively. Mean of this population is 3. Someone who does not know the contents of this bag will estimate the balue of mean by randomly...

Statistics Question Answers RSS feed