A Z-score for a test value of 70% is 0, and a Z-score of 1.0 corresponds to a test score of 74%. Match the remaining Z-scores with the standard deviations
A Z-score for a test value of 70% is 0, and a Z-score of 1.0 corresponds to a test score of 74%. Match the remaining Z-scores with the standard deviations
Explain random sampling and why it is important.
a pharmaceutical company receives large shipments of aspirin tablets. the acceptance sampling plan is to randomly select and test 14 tablets, then accept the whole batch if there is only one or none...
A paint manufacturer uses a machine to fill gallon cans with paint. a)The manufacturers wants to estimate the mean volume of paint the machine is putting in the cans within 0.25 ounces...
Hi! I am in a college statistics class and we have just finished covering sampling distributions. I am trying to work through my homework problems right now and am totally lost! I...
In a frequency table, there is a column named "fx". What does it mean? Thankyou
There are 35 bolts and the measurements are: 1.5625 1.6625 1.6625 1.6625 ...
In a survey of 1120 new college graduates 281 had a professional job on graduation day. One year ago the proportion of graduates with a professional job on graduation day was 24%. The setup of the...
Can't seem to get the right answer for these 5. Please help! thanks!!! The 50th percentile is ____ The 10th percentile is ____ The 90th percentile is ____ The 20th percentile...
(a) What is the probability of there being between 19,000 and 21,000 inmates in a given month? (b) What is the probability of there being fewer than 16,000 inmates? (c) What percentile is associated...
There are 4 colored balls (a red, a green, a black, and a blue) in a bag. In how many ways we can draw 3 balls from the bag, if repetition is allowed.
a) P[Z< .62] b) P[Z < -.62] C) P[Z> 1.59] D) P[-1.3< Z< 2.61] E) P[|Z| < 1.65]
The weight of a checked suitcase at a particular airport has a mean of 18.5kg and a standard deviation of 3.5kg. 1) Find the standard deviation of the sample mean weight for a sample...
I have no idea how to figure this one out. Please help! thanks x has a ____________ Distribution µ=______ s2_________ ...
(a) What proportion of the students has SAT verbal scores that are at least 600? (b) What proportion of the students has SAT verbal scores that are at least 400? (c) Find an SAT verbal score such...
Need to perform The statistical test required with an alpha level of .01
out of the population of a town,60% belongs to the back race and the rest belongs to the white race.it was estimated that their mean in coes were birr 2,00.00 and 5,000.0 respectively find the average...
Please help me fill in these blanks!!! Not sure how to do this stuff. Z has a ____________ Distribution µ=______ ...
Question is: let the random variable x represent the sum of the points in two tosses of a die. A) list the possible values of x B) For each value of x, list the...
X values= 2,4,6,8 F(X)= .3, .5, .1, .1 Find the mean and standard deviation?