945 Answered Questions for the topic Statistics Question

Statistics Question Statistics Stats Probability Stats

11/05/15

Z-score Stats question
I have no idea evn how to start this question  The average Demand for renatl skis on winter Saturdays at a particular area is 150 pairs which has been quites stable over time. There is variation... more
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Statistics Question

11/05/15

When you divide the number of permutations of 11 objects taken 3 at a time by? 3!, you will get the number of combinations of 11 objects taken 3 at a time
Statistic question
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Statistics Question

11/05/15

Statistics
Use technology and the given confidence level and sample data to find the confidence interval for the population mean muμ. Assume that the population does not exhibit a normal distribution.Weight... more
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Statistics Question Probablitly

11/04/15

if P(A^c)=80% , then P(A and A^c) is equal to?
Statistics and probability. 
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Statistics Question

11/03/15

For 1 week, a medical student records the diastolic pressure reading of each person who uses the machine between the hours of 10 A.M. And 2 P.M.,
With the following results: N = 114, ∑ X = 9,561.2, ∑ X2 = 678,360.92. a. How many of the samples had scores of 110 or higher? b. What was the probability of a score of 60 or less? c. If the... more
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Statistics Question

11/03/15

Math statistics case study :(
Probability Distribution of the Number of Families per Parish of German Immigrants on Board the 1752 Voyage of the St. Andrew     # of families                                        ... more
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Statistics Question

11/02/15

Find the probability
90% of married women claim to dislike their mother-in-laws. Suppose 8 married women are out to lunch. What is the probability that 5 of them dislike their mother-in-law
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Statistics Question

11/02/15

need help. show the steps
A psychic network recieved telephone calls last year from over 1.5 million people. A recent article attempts to shed some light onto the credibility of the psychic network. one of the psychic... more
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Statistics Question

11/02/15

Statstics. Can you show me by steps?
In the American version of the Game Roulette, a wheel has 18m black slots, 8 red slots and 2 green slots.  all slots are the same. a person can wager on either red or black. green is reversed for... more
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Statistics Question

11/02/15

10 person Focus Group with a mean of 4.8 and standard deviation of 0.73 of people who recognize name brands
focus groups of 10 people are randomly selected to discuss products of the Famous company. it is determined that the mean number (per group) who recognize the famous brand name is 4.8, and the... more
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Statistics Question

10/31/15

I've done a t-test in excel and get .013. How do I determine if this is statistically significant?
I am trying to see if two separate groups of students have scored significantly different on a test. I've done a t-test in excel and get .013. How do I determine if this is statistically significant?
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Statistics Question

10/29/15

License plates are made using 2 letters followed by 2 digits. How many plates can be made if repetition of letters and digits is allowed
I need help
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Statistics Question

10/26/15

A random sample of 50 gas stations in Cook County, Illinois, resulted in a mean price per gallon of $2.60 and a standard deviation of $0.07
A) what percentage of gas stations have a price per gallon between $2.39 to and $2.81 B) what percentage of gas stations have a price per gallon between $2.53 to and $2.67
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10/26/15

Statistics/Probability question
Four balls with different colors: red, yellow, green, and blue, are placed in a box. Every time Amy picks up a ball, then puts it back to the box and draws one again, repeating it five times.  a)... more
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Statistics Question

10/26/15

calculations of missing frequencies
  In the frequency distribution of 100 families given below, the number of families corresponding to expenditure groups 20—40 and 60—80 are missing from the table. However, the median is known to... more
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Statistics Question

10/25/15

need Math help
A grocer purchases 200 apples. find the standard deviation of bad apples assuming 5% are bad. (round two decimals)
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Statistics Question Statistics

10/24/15

What are the values of n, p, and q in binomial probability?
Full question. Our experiment will be drawing 10 cards with replacement from a standard deck of 52 cards (with 13 hearts, 13 diamonds, 13 clubs, 13 spades). We will record the number of diamonds.a.... more
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Statistics Question

10/22/15

What statistical test to use for the following?
What statistical test to use for the following? 1. Level of traffic on a website the year before implementation of a change, the year of the change and the year after the change. 2. Proportion of... more
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Statistics Question

10/22/15

a binomial probability experiment is conducted
a binomial probability experiment is conducted with the given parameters. compute the probability of x successes in the n independent trials of the experiment.  n=13 p=0.35 x≤4
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Statistics Question

10/20/15

TOTALLY LOST NEED HELP WITH THIS
Assume that a procedure yields a binomial distribution with n trials and the probability of success for one trial is p. Use the given values of n and p to find the mean μ and standard deviation... more
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Statistics Question

10/16/15

COMPLETELY CONFUSED
A brand name has a 60% recognition rate. Assume the owner of the brand wants to verify that rate by beginning with a small sample of 7 randomly selected consumers. Complete parts (a) through (d)... more
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Statistics Question

10/16/15

Requiring Assistance
I'm bewildered on this!!   If np ≥ 5 and nq ≥ 5, estimate P(fewer than 6) with n = 14 and p = 0.5 by using the normal distribution as an approximation to the binomial distribution; if np <5 or... more
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Statistics Question

10/16/15

statistical assistance
I need some help with the answer Please!!!   An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 140 lb and 191 lb. The new... more
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Statistics Question Math Statistics Word Problem

10/15/15

Statistics Probability word problem
A box contains a total of 100 CDs that were manufactured on two machines. Of them, 60 were manufactured on machine 1. Of the total CDs, 15 are defective. Of the 60 CDs that were manufactured on... more
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Statistics Question

10/15/15

Statistics problem
Could someone answer this I’m lost Assume the significance level is a = 0.1 use the given information to find the P – value and the critical value(s). The test statistic of z = 1.62 is obtained... more
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