# Stats

My hypothesis test is a lower tail test. and this is the data i developed for my p values and z statistics and I have a feeling its wrong because shouldnt all the z statistics be negative? I am very confused.

remeber each answer is only to two decimals:

Firm 1: pvalue 0.99, z statistic 2.65
firm2 : pvalue 0.04, z statistic -1.73
firm3: pvalue 0.01, z statisct -2.23
firm4: pvalue 0.00 z staitics -3.16
firm5 p value 0.00, z statistic -3.82

1. 👍 0
2. 👎 0
3. 👁 113
1. Yes, if you are talking about the "lower end," the Z scores should all be negative.

However, firm 2 = -1.75
Other data is in error. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z scores. P value of zero cannot have two different Z scores.

1. 👍 0
2. 👎 0
posted by PsyDAG

## Similar Questions

1. ### math/stats

Which of the following statements are true? (A) In a two-tail test of hypothesis for a population mean the decision rule is to reject H0 if the test statistic lies outside of the action limits. (B) A statistical test of hypothesis

asked by Anonymous on March 27, 2015

16-To test the hypothesis H0 : ì = 100 against H1 : ì > 100, a statistics practioner randomly sampled T observations and found the mean x = 106 and the standard deviation sx = 35. The value of the test statistic is equal to (1)

asked by Judy and group on April 1, 2010
3. ### Sta

It is pretty common across most schools to find the grades at the MBA level divided between A’s and B’s. As such, you expect the mean GPA to be around 3.50. Using the sample of 200 MBA students, conduct a one-sample hypothesis

asked by Mark on March 17, 2012
4. ### Stats

I have tried to find the p value and z statitcs for each of the firms below and I am so confused becuase my answers arent making any sense. The randome sample is 40, the hypothesis we are testing is a lower tail test 35, pop st

asked by Maya on September 23, 2018
5. ### Stats

Depending on your school commute on your way to to campus, you regularly stop at one of two of your favorite coffee shop locations "Fresh Pots!". You begin to suspect that one location is inconsistently producing their coffee by

asked by Plzz help on November 7, 2016
6. ### math

A researcher is performing a hypothesis test. The null hypothesis is that μ=10 and the alternative hypothesis is that μ

asked by jerrod on April 9, 2014
7. ### Statistics

A manufacturer makes ball bearings that are supposed to have a mean weight of 30g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.8 g with a

asked by Leslie667 on April 22, 2015
8. ### statistics

The owner of a bottling company is considering buying a new bottling machine. He has been testing two different machines that are being considered. After collecting 300 samples from each machine over several weeks, he was able to

asked by Anonymous on January 8, 2011
9. ### Statistic

A restaurant that bills its house account monthly is concerned that the average monthly bill exceeds \$200 per account. A random sample of twelve accounts is selected, resulting in the sample mean of \$220 and a sample standard

asked by Marilyn on October 20, 2008