945 Answered Questions for the topic Statistics Question

Statistics Question

10/23/16

Satatistics
the local police force gives all applicants an entrance exam and accepts only those applicants who score in the top 15% on this test. If the mean score this year is 87 and the standard deviation is... more
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Statistics Question

10/20/16

Statistics
Your average grade after 5 tests in Biology is a 65. However, after the most recent test your averageincreased to a 70. What grade did you get on the test in order to increase your average?
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Statistics Question

10/19/16

stats question
choose at random a young adult aged 19 to 22 years. Ask their age and where they live (with their parents, in their own place, or in some other place such as a college dormitory) here is the... more
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Statistics Question

10/19/16

Given the following information about a sample, calculate a z score for a test grade of 91. = 87, s = 4.01
 Given the following information about a sample, calculate a z score for a test grade of 91.= 87, s = 4.01
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Statistics Question Statistics Math Help Intervals

10/18/16

Mean or Proportion?!
1. Chips Ahoy wants to perform a study to determine the number of chocolate chips in their cookies. To that end, they collected a sample of 40 cookies. The mean of this sample is 23.95 chocolate... more
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Statistics Question Statistics Z Scores

10/17/16

Find the z-score
Suppose 12 people are asked to rate themselves in terms of their accumulated wisdom. The first 11 people, being humble, give themselves a zero. The 12th person--with gigantic arrogance--responds by... more
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Statistics Question

10/17/16

Statistics Question
Two-thirds of students have jobs to help with bills in college. If 20 students are surveyed what is the probability that half of the students will have jobs?
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10/17/16

Statistics
An urn contains 3 white marbles and 2 black marbles. Two marbles are drawn without replacement. What is the probability that the first marble drawn is white OR the second is black?
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Statistics Question Math Statistics Discrete Mathematics

10/16/16

Statistics Question
Type | Probability 1 ton | 0.25 2 tons | 0.06 5 tons | 0.01 10 tons | 0.11 20 tons | 0.57     An appliance dealer sells 5 types of air conditioners. The above gives the distribution of the... more
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Statistics Question Statistics Probability Math Help

10/16/16

Please, answer with the full solution! Thanks for the help!
Readings on a thermometer are normally distributed with a mean of 0C and a standard deviation of 1.00.What is the probability that a randomly selectedthermometer reads: • Less than 0.53.• Greater... more
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Statistics Question

10/13/16

1. You are asked whether N, N, D, N, D constitute quantitative or qualitative data. Your best reply is
a. quantitative because the letters probably refer to a count. b. qualitative because the letters probably refer to a class or a category. c. quantitative or qualitative depending on whether the... more
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Statistics Question

10/09/16

if a b c are independent events , prove A prime b prime and c prime are also independent events.......
if a b c are independent events , prove A prime b prime and c prime are also independent events.......
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Statistics Question

10/08/16

Hypergeometric Probability Distribution
The game called Lotto sponsored by the Louisiana Lottery Commission pays its largest prize when a contestant matches all 5 of the 39 possible numbers. Assume there are 39 ping-pong balls each with... more
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Statistics Question

10/07/16

In an election year, we have and will see poll results: Candidate x has a 45% positive rating, Candidate y a 53% positive rating, with 2% undecided. Possible er
In an election year, we have and will see poll results: Candidate x has a 45% positive rating, Candidate y a 53% positive rating, with 2% undecided. Possible error is 5%.What does the 5% mean in... more
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Statistics Question

10/07/16

Why must the Null Hypothesis and the Alternate Hypothesis be mutually exclusive?
In statistics: Why must the Null Hypothesis and the Alternate Hypothesis be mutually exclusive?
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Statistics Question Statistics Stats

10/05/16

statistics - normal distribution multiple choice
  The variable X is normally distributed with a mean u and a standard deviation o. Let A be a value of X. For the current values of u, o, and A it is known that P(X<A)=.4512. If the value of of... more
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Statistics Question Statistics College Math

10/04/16

Simple Stats Questions But Confused Need Help Soon *TRYING TO MAKE SICK DAD PROUD*
A survey is conducted to see which gender is more likely to shop online. Amongthe 1000 people selected, 60% of females shop online, 40% of males shop online, and 55% arefemales.1. What is the... more
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Statistics Question Statistics College Math

10/04/16

STATS HARD QUESTIONS NEED HELP
If the lifetime length of light bulbs from a certain factory follows a normal distribution with mean 2500 hours and standard deviation 50 hours. 1. What is the percentage of light bulbs that can... more
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Statistics Question

10/04/16

Statics Question
You are interested in calculating the hospital-acquired infection rate for the intensive care unit for the month of June. If the number of hospital-acquired infections is the numerator, what is the... more
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Statistics Question Math Statistics Math Help For College

10/03/16

Statistics Question Need Help With Steps Trying to Make Sick Dad Proud
Please show how to solve with steps, in simplest way possible : Two athletes, Dave and Mike, run for 100 meters five times. The time they spend(in seconds) are recorded in the following.Dave: 9.9,... more
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Statistics Question Statistics Statistics Method

09/30/16

A basketballs players attempts 20 shots from the field during a game...
A basketballs players attempts 20 shots from the field during a game. This player hits about 46% of these shots. What is the chance the player hits more than 15 shots? This information will help... more
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Statistics Question Statistics Math Help For College

09/29/16

Statistical eror predicting a due date
The test results gave a date that was a month before the baby was born. The hospital sent a doctor to mrs. Stewart to try to determine why the predicted due date was so far off. Mrs. Stewart found... more
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09/28/16

Three marbles are drawn randomly WITH REPLACEMENT
Three marbles are drawn randomly WITH REPLACEMENT from a box with 5 blue and 7green marbles.(a) What is the probability that all the marbles drawn are green?(b) What is the probability that 2 of... more
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Statistics Question

09/26/16

What is the (approximate) probability that a randomly selected adult has shopped on the Internet?
A random sample of 1048 adults showed that 683 of them have shopped at least once on the Internet. What is the (approximate) probability that a randomly selected adult has shopped on the... more
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Statistics Question

09/21/16

Suppose the average height of a sports team is 6ft 8in. Is the average height for starters above the average of the team?
The starters have heights of 6'5",6'6",7'1",6'6",and 7'2".
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