02/26/24

Mr. Abu has a box of 7 blue marbles and 3 red marbles. 2 marbles were selected randomly without replacement. What is the possibility that,
(1) Both marbles were blue(2) both marbles were red.(3) The first marble was blue and the second marble was red.
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02/25/24

Probability and statistics

Females have mean weight of 78.6kg with standard deviation of 5.03 kg. 1. 20% of females weigh less than t kg. Find value of t , to 2 decimal places2. Middle 90% of males weigh between an and b kg.... more
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02/23/24

Help with math homework

Use the following sample to estimate a population mean . 74.6 65.9 76.1 57.3 65.9 74.4 Assuming the population is normally distributed, find the 99.5% confidence interval about the population... more
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02/23/24

I need help with homework question 4
A researcher must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures 23.824.640.536.122.631.913.8assuming the population of temperatures are normally... more
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02/23/24

I need help with a homework question

Assuming the population has an approximate normal distribution if a sample size n=10 has a sample mean x = 38 with a sample standard deviation s=2 find the margin error at a 95% confidence level.... more
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02/23/24

5x+10y=30 in slope intercept form
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02/23/24

How to find domain and range from the equation (x+6)^2+(y+4)^2=16
I can find the center and radius but I am lost on how to find the domain and range.
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02/22/24

The height of an object tossed upward with an initial velocity of 120 feet per second is given by the formula h = −16t2 + 120t, where h is the height in feet and t is the time in seconds,
The height of an object tossed upward with an initial velocity of 120 feet per second is given by the formula h = −16t2 + 120t, where h is the height in feet and t is the time in seconds. Find the... more
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02/22/24

Could Someone Please Help With This Statistics Problem?
A group of researchers is studying the relationship between cortisol (stress hormone) levels and memory, and they want to see if a sample of 100 adults that has been recruited is a good... more
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02/21/24

Will Someone Please Help Me Solve This Statistics Question?
Use two separate groups to create two population mean estimates (and let's assume the population is normally distributed). Ask a group of friends how much time (in hours) they spent on social media... more
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02/20/24

intro to stats and analytics

According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. You randomly... more
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02/20/24

Intro to stats and anayltics

If a seed is planted, it has a 80% chance of growing into a healthy plant.If 7 seeds are planted, what is the probability that exactly 2 don't grow?Round your answer to 4 decimal places.Can you... more
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02/20/24

Question below. Thanks for the help.

The population of weights of a particular fruit is normally distributed, with a mean of 406 grams and a standard deviation of 35 grams. If 9 fruits are picked at random, then 11% of the time, their... more
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02/20/24

Question below. Thanks for the help.

The population of weights of a particular fruit is normally distributed, with a mean of 406 grams and a standard deviation of 35 grams. If 9 fruits are picked at random, then 11% of the time, their... more
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02/18/24

Out of 500 people sampled, 235 preferred Candidate A. Based on this, estimate what proportion of the entire voting population

Out of 500 people sampled, 235 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.Use a 95% confidence level, and give your... more
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02/18/24

How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 89%. You would like to be 80% confident that your... more
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02/18/24

How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.38. You would like to be 95% confident that... more
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02/18/24

You would like to be 80% confident that you estimate is within 1.5% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 80%... more
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02/18/24

What size of sample is needed?

A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 0.2% margin of error at a 99% confidence level, what size of... more
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02/18/24

i need help with this question

Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the height of a man with a z-score of 3.39. Round your answer to one decimal place
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02/16/24

Could Someone Please Help Me Answer This Statistics Problem?
Consider the following example: Data on social media use was collected from a sample of college students. The average daily amount of social media use by this group was found to be 3.4 hours, with... more
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02/16/24

what do i write about

i love art horses and softball but i don't know what to write about
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02/15/24

Reba is comparing two types of savings accounts.
Reba is comparing two types of savings accounts. Account A has a 6% annual simple interest rate, while Account C has a 5% annual interest rate compounded yearly. For an initial investment of $200,... more
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02/15/24

Recall the equation for simple interest
Recall the equation for simple interest, A=P(1+rt). Compare the amount of interest earned in 10 years for an investment of $3700 with a 7% annual simple interest rate and a 7% annual interest rate... more
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02/14/24

Descriptive statistics
We are given a table for the city of Detroit, Michigan USA for the period of 1961 to 1973 with the following information: a column with the number of full-time police per 100,000 citizens and a... more
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