114 Answered Questions for the topic AP statistics

Ap Statistics Statistics

10/07/19

A clinical trial tests a method designed to increase the probability of conceiving a girl.

In the study 380 babies were​ born, and 342 of them were girls. Use the sample data to construct a 99​% confidence interval estimate of the percentage of girls born. Based on the​ result, does the... more
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Ap Statistics Statistics

10/06/19

Assume that human body temperatures are normally distributed with a mean of 98.20 degrees F and a standard deviation of 0.61 degrees F.
Physicians want to select a minimum temperature for requiring further medical tests. What should that temperature​ be, if we want only​ 5.0% of healthy people to exceed​ it?
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Ap Statistics Statistics

10/05/19

A survey found that​ women's heights are normally distributed with mean 63.8 in. and standard deviation 2.9 in.
The survey also found that​ men's heights are normally distributed with mean 67.5 in. and standard deviation 3.2 in. Most of the live characters employed at an amusement park have height... more
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Ap Statistics Statistics

10/05/19

A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects.

After treatment with the​ drug, 20 subjects had a mean wake time of 90.7 min and a standard deviation of 43.7 min. Assume that the 20 sample values appear to be from a normally distributed... more
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Ap Statistics Statistics

10/03/19

The overhead reach distances of adult females are normally distributed with a mean of 197.5 cm and a standard deviation of 8.6 cm.
a. Find the probability that an individual distance is greater than 210.90 cm.b. Find the probability that the mean for 15 randomly selected distances is greater than 196.20 cm.196.20 cm.c. Why can... more
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Ap Statistics Statistics

10/03/19

Assume that military aircraft use ejection seats designed for men weighing between 141.4 lb and 210 lb.
If​ women's weights are normally distributed with a mean of 179.6 lb and a standard deviation of 47.64 ​lb, what percentage of women have weights that are within those​ limits? Are many women... more
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Ap Statistics Statistics

10/02/19

Assume that human body temperatures are normally distributed with a mean of 98.18 degrees F and a standard deviation of 0.62 degrees F
a. A hospital uses 100.6°F as the lowest temperature considered to be a fever. What percentage of normal and healthy persons would be considered to have a​ fever? Does this percentage suggest that... more
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Ap Statistics Statistics

10/02/19

The percentage of women that have weights between those limits is

Assume that military aircraft use ejection seats designed for men weighing between 131.7 lb and 206 lb. If​ women's weights are normally distributed with a mean of 165.5lb and a standard deviation... more
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Ap Statistics Statistics

10/02/19

The probability that a randomly selected adult has an IQ less than 132 is
Assume that adults have IQ scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. Find the probability that a randomly selected adult has an IQ... more
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Ap Statistics

09/12/19

A data set with a standard deviation of 0
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Ap Statistics

09/12/19

a distribution of 8 scores has a median of 33 . if the highest score increases 8 points , the median will now be :
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Ap Statistics Statistics

09/08/19

When purchasing bulk orders of​ batteries, a toy manufacturer uses this acceptance sampling​ plan:

Randomly select and test 42 batteries and determine whether each is within specifications. The entire shipment is accepted if at most 3 batteries do not meet specifications. A shipment contains... more
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Ap Statistics Statistics

09/06/19

Find the probability that the number x of correct answers is fewer than 4.
Assume that random guesses are made for seven multiple choice questions on an SAT​ test, so that there are n=7 ​trials, each with probability of success​ (correct) given by p=0.350 Find the... more
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Ap Statistics Math Statistics

09/06/19

Statistics Distribution Problem
I was doing an AP Stats problem where an experiment is run beginning with the number 15, and either it would be doubled or increased by 1, for 30 times, each time with the sum being either doubled... more
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Ap Statistics

07/29/19

If 1990 could be considered year zero, which of the above numbers represents the slope and which represents the y intercept?
The USDA reported that in 1990 each person in the United States consumed an average of 133 pounds of natural sweeteners. They also claim this amount has decreased by about 0.6 pounds each year.If... more
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Ap Statistics Statistics

07/24/19

AP STATS PROBABILITY
There are 9 students in a class: 5 boys and 4 girls. If the teacher picks a group of 4 at random, what is the probability that everyone in the group is a boy?
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Ap Statistics Math Statistics Probability

07/19/19

find the probability that both are red.
Suppose a jar contains 5 red marbles and 32 blue marbles. If you reach in the jar and pull out 2 marbles at random without replacement, find the probability that both are red. Round your answer to... more
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Ap Statistics Math Statistics Probability

07/19/19

what is the probability that a randomly selected U.S. adult has asthma and pet allergies?
About 7.6% of the U.S. adult population suffers from asthma, and about 28% of people with asthma also have pet allergies. Rounding your answer to four decimal places, what is the probability that a... more
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Ap Statistics Math Statistics Probability

07/19/19

Find the probability of between 5 and 7 email messages received (endpoints included) in a given minute.
Records show that the average number of email messages received per minute is 7.7. Find the probability of between 5 and 7 email messages received (endpoints included) in a given minute.Round... more
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Ap Statistics Math Statistics Highschool

05/24/19

An experiment finds that 27% of 103 subjects report improvement after using a new medicine. (read description))
An experiment finds that 27% of 103 subjects report improvement after using a new medicine.A. check conditions and create a 90% confidence interval for the actual cure rateB. Interpret the... more
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Ap Statistics

04/20/17

Standard deviation
Terry is standing in line waiting for a snack. He will recieve one serving of chips and one serving of salsa. The amount of chips (in grams) per serving is a random variable with standard deviation... more
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12/15/16

The census bureau reports that 29% of California residents were born outside of the US. Suppose that you choose four Californians independent of each other.
Let F= the number of foreign-born people in a randomly-selected group of four.  a)Find P(f=1) b)Find P(f>or =1) c)find and interpret the expected value of F. d)find and interpret the... more
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Ap Statistics Math Statistics Psychology

11/28/16

May you please help me?
do cafe customers stay longer with darker lighting- is this observational or observational with case control     It's either a.observational b.observational with case control c.experiment or... more
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11/28/16

Statistics/psych Question
The second one is: do cafe customers stay longer with dark let lighting- is this observational,observational with case control,experiment,experiment with single or double blinding
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11/28/16

Statistics Question!
Do adding multivitamin supplements to your daily diet help decrease the number of colds caught...is this a double blind or single blind study?
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