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Statistics

10/10/22

Need help on stastics homework

A Field Poll Survey reported that 64% of registered voters in a state approved of allowing two people of the same gender to marry and have regular marriage laws apply to them. Among 18 to 39 year... more

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Statistics Probability

10/10/22

In a club with 8 junior members and 14 senior members, a 5-member committee will be randomly chosen. Find the probability that the committee contains at least 4 senior members.

Also, what's the probability that the committee will include 4 senior members?

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Statistics

10/10/22

If a seed is planted, it has a 75% chance of growing into a healthy plant. If 6 seeds are planted, what is the probability that exactly 1 doesn't grow?

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Statistics

10/09/22

Math Statistics

65% of all violent felons in the prison system are repeat offenders. If 33 violent felons are randomly selected, find the probability that

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Statistics

10/09/22

math statistics

The student council is hosting a drawing to raise money for scholarships. They are selling tickets for $10 each and will sell 700 tickets. There is one $3,000 grand prize, three $500 second prizes,... more

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Statistics

10/09/22

Computing z score in a normal distribution

Q1: What is the z-score at 1 standard deviation away from the mean? Assume that the distribution is normal.

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Statistics

10/08/22

Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 17.7 years and a standard deviation of 1.8 years.

the probability that a randomly selected quartz time piece will have a replacement time less than 14.1 years? P(X < 14.1 years) if the company wants to provide a warranty so that only 1% of the... more

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Statistics

10/08/22

What proportion of pregnancies last fewer than 262 days? P(X < 262 days)

The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 16 days. A distribution of values is normal with a mean of 260 and a... more

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Statistics

10/08/22

For a standard normal distribution, P(-2.11 < z < 2.72)

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Statistics

10/08/22

Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 67.7 inches tall

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Statistics Business Mathematica

10/08/22

Business mathematics and statistics

The present worth of a bill due at the end of 4 years is rs575 and if the bill were due at the end of 2 1/2 tears its present worth would be rs 620 fund the rate per cent

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Statistics Business Mathematica

10/08/22

Business mathematics and statistics

The present worth of a bill due at the end of 4 years is rs575 and if the bill were due at the end of 2 1/2 tears its present worth would be rs 620 fund the rate per cent

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Statistics

10/08/22

Probability of a Red or Odd numbered marble

A jar contains 10 red marbles numbered 1 to 10 and 10 blue marbles numbered 1 to 10. A marble is drawn at random from the jar. Find the probability of the given event, please show your answers as... more

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Statistics

10/07/22

In a population where 68 % of voters prefer Candidate A, an organization conducts a poll of 5 voters. Find the probability that 5 of the 5 voters will prefer Candidate A.

In a population where 68% of voters prefer Candidate A, an organization conducts a poll of 5 voters. Find the probability that 5 of the 5 voters will prefer Candidate A.

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Statistics

10/07/22

Sample test statistic

You are testing the claim that the proportion of men who own cats is smaller than the proportion of women who own cats.You sample 100 men, and 80% own cats.You sample 200 women, and 75% own... more

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Statistics

10/07/22

Assume the random variable X is normally distributed with mean 50 and standard deviation 7 . Find the 67th percentile

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Statistics

10/07/22

Compute the probability of randomly drawing 5 cards from a deck and getting exactly 3 spades.

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Statistics

10/07/22

sample Test Statistic

You are testing the claim that the proportion of men who own cats is smaller than the proportion of women who own cats.You sample 100 men, and 80% own cats.You sample 200 women, and 75% own... more

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Statistics

10/06/22

GPA students mean

You are testing the claim that the mean GPA of night students is less than the mean GPA of day students.You sample 40 night students, and the sample mean GPA is 2.14 with a standard deviation of... more

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Statistics

10/06/22

Sample sizes question

Two samples are taken with the following numbers of successes and sample sizesr1 = 20 r2 = 30n1 = 50 n2 = 52Find a 85% confidence interval, round answers to the nearest... more

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Statistics Math Geometry

10/06/22

I already have the answer but I'm confused on how to put this in a calculator to get that solution.

How would I type this in a calculator? (Binomial Distribution)P( x=3)=(20) 0.053 (0.95)17=0.0596 3

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Statistics Probability

10/06/22

Introduction to statistics

Suppose a population has µ = 8 and δ= 3. Suppose a random sample of n= 36 is selected. What is the probability that the sample mean is between 7.8 and 8.2?

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Statistics Probability

10/06/22

Statistics and probability distribution

Hailstorms are common phenomena in parts of a certain country. From past experience it has been shown that in a forestry plantation, there is about an 80% chance that certain tree... more

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Statistics

10/06/22

Compute the probability of randomly drawing 5 cards from a deck and getting exactly 3 spades.

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Statistics Math

10/05/22

im having trouble

Say you have a biased coin and you associate obtaining a head with the value 0 whereas obtaining a tail has a value of 2. Let X be the sum of the values obtained from tossing the coin three times.... more

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Need help on stastics homework

In a club with 8 junior members and 14 senior​ members, a ​5-member committee will be randomly chosen. Find the probability that the committee contains at least 4 senior members.

If a seed is planted, it has a 75% chance of growing into a healthy plant. If 6 seeds are planted, what is the probability that exactly 1 doesn't grow?

Math Statistics

math statistics

Computing z score in a normal distribution

Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 17.7 years and a standard deviation of 1.8 years.

What proportion of pregnancies last fewer than 262 days? P(X < 262 days)

For a standard normal distribution, P(-2.11 < z < 2.72)

Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 67.7 inches tall

Business mathematics and statistics

Business mathematics and statistics

Probability of a Red or Odd numbered marble

In a population where 68 % of voters prefer Candidate A, an organization conducts a poll of 5 voters. Find the probability that 5 of the 5 voters will prefer Candidate A.

Sample test statistic

Assume the random variable X is normally distributed with mean 50 and standard deviation 7 . Find the 67th percentile

Compute the probability of randomly drawing 5 cards from a deck and getting exactly 3 spades.

sample Test Statistic

GPA students mean

Sample sizes question

I already have the answer but I'm confused on how to put this in a calculator to get that solution.

Introduction to statistics

Statistics and probability distribution

Compute the probability of randomly drawing 5 cards from a deck and getting exactly 3 spades.

im having trouble

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In a club with 8 junior members and 14 senior members, a 5-member committee will be randomly chosen. Find the probability that the committee contains at least 4 senior members.