8,918 Answered Questions for the topic statistics
Statistics
03/26/22
b. Find the critical value t a/2 corresponding to a 95% confidence level
TInterval(13.046,22.15)x=17.598Sx=16.01712719n=50
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Statistics
03/26/22
Stats q pls help
Weights of erasers produced by a certain factory are known to follow the uniform distribution between 31.5 g and 32.3 g. (a) (10 points) Erasers produced by this factory are sold in packs of 45. A...
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PLEASE help with statistical probability questions!
In a class of 26 students, 14 have a cat and 7 have a dog. There are 5 students who have a cat and a dog. What is the probability that a student chosen randomly from the class does not have a dog?
03/25/22
Having a lot of trouble with this. Can someone help?
A fine dining restaurant claims that the group sizes of their customers follows the following distribution:
2 people3 people4 people4+ people
32%
13%
18%
37%
Gustavo, a waiter at the restaurant,...
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Statistics
03/25/22
Normal Distribution and Percentages
The graph illustrates a normal distribution for the prices paid for a particular model of HD television. The mean price paid is $1800 and the standard deviation is $85.What is the approximate...
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PLEASE help with statistical probability questions!
In a math class with 19 students, a test was given the same day that an assignment was due. There were 11 students who passed the test and 14 students who completed the assignment. There were 3...
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PLEASE help with statistical probability questions!
In a math class with 19 students, a test was given the same day that an assignment was due. There were 11 students who passed the test and 14 students who completed the assignment. There were 3...
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please help me with statistical probability question!
Age 20-29
Age 30-39
Age 40-49
Age 50 & over
Total
High school only
946
1118
369
1010
3443
Some college
1088
1277
566
2106
5037
Bachelor's degree
646
1045
472
2083
4246
Master's...
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Please help with statistical probability questions
In a certain Algebra 2 class of 30 students, 16 of them play basketball and 8 of them play baseball. There are 12 students who play neither sport. What is the probability that a student chosen...
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help with statistical probability
In a class of 25 students, 17 have a cat and 7 have a dog. There are 5 students who have a cat and a dog. What is the probability that a student who has a cat also has a dog?
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help with statistical probability
Age 20-29
Age 30-39
Age 40-49
Age 50 & over
Total
High school only
1413
661
799
602
3475
Some college
2237
562
1193
1185
5177
Bachelor's degree
1062
1391
1187
1732
5372
Master's...
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help with probability and statistics
There is a spinner with 10 equal areas, numbered 1 through 10. If the spinner is spun one time, what is the probability that the result is a multiple of 2 and a multiple of 5?
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please help with these maht statistical probabilty questions
Plays an instrument
Does not play an instrument
Plays a sport
5
2
Does not play a sport
4
12
In a class of students, the following data table summarizes how many students play an instrument...
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please help with this math probability statistical question
Has a brother
Does not have a brother
Has a sister
2
3
Does not have a sister
10
7
In a class of students, the following data table summarizes how many students have a brother or a sister....
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A 90% confidence intervals for the proportion...
A 90% confidence intervals for the proportion of first-year statistics students with brown hair is given to be (0.25, 0.41).(a) What is the sample proportion of students with brown hair? (Round to...
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Statistics
03/24/22
Standard Normal Distribution
For a standard normal distribution, find:P(z < -1.19)
Statistics
03/24/22
Exponential distribution
The average time between accidents in a factory is 7 weeks.Find the probability that more than 21 weeks pass between accidents.
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03/24/22
Find the standard deviation in volumes of quart-size Hellmann's mayonnaise jars.
The actual volumes of quart-size jars of Hellmann's mayonnaise are uniformly distributed from 31.43 to 32.5 fluid ounces. Find the standard deviation in volumes of quart-size Hellmann's mayonnaise...
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Statistics
03/23/22
Statistical Math
NBA Player Stephen Curry has a better free throw percentage than the average forall NBA players. Based on his free throw percentage of 90.7%, the following bar graph displays the possible values of...
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Statistics
03/23/22
stats i need help asap
Assume that adults have IQ scores that are normally distributed with a mean of 101.6 and a standard deviation 21.9. Find the first quartile Q,, which is the IQ score separating the bottom 25% from...
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Statistics Math
03/23/22
I don't understand how to solve this. Can someone help me step by step?
A newspaper conducted a statewide survey concerning a proposal to raise taxes in order to prevent budget cuts to education. The newspaper took a random sample (assume it is an SRS) of 500...
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A local five-star restaurant asks its patrons to fill out a quick satisfaction survey (is the patron satisfied or not) after their meal
A local five-star restaurant asks its patrons to fill out a quick satisfaction survey (is the patron satisfied or not) after their meal, and the restaurant claims that their satisfaction rating is...
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Statistics
03/23/22
statistics problems
The area between z = −2.26 and z = 1.32 is
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03/23/22
The average weight of 25 chocolate bars selected from a normally distributed population is 200 grams with a standard deviation of 10 grams.
The average weight of 25 chocolate bars selected from a normally distributed population is 200 grams with a standard deviation of 10 grams. Find the point estimate and the confidence interval...
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Statistics Probability
03/23/22
Find P61 find the value and sample mean
A population of values has a normal distribution with μ=245.2μ=245.2 and σ=48.8σ=48.8. You intend to draw a random sample of size n=84n=84. Please answer the following questions, and show your...
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