1,029 Answered Questions for the topic Statistics Question

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 Measurement Statistics

10/17/16

Measurement Statistics
You weighed your dog this morning on your bathroom scale. His weight was 15 lb. You decided to weigh him again in the evening, and his weight had increased to 20 lb. This is most likely what type... 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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Statistics Question

09/18/16

Suppose the weight of an American woman 20 years or older should be normally distributed with a mean of 131 pounds and a standard deviation of 12 pounds.
This is also part of the question about it just wouldn't let me fit the whole question in the box.    What is the probability that a woman has a weight of more than 160 pounds if this were true?
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Statistics Question Math Statistics Math Help

09/18/16

REALLY REALLY NEED URGENT HELP
Need help for thisA group of working adults was surveyed to find out how well they sleep on weekend nights. The pie chart below shows, correct to the nearest hour, the hours of sleep of these... more
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