"Suppose 4-year-ölds in a certain country average 3 hours a day unsupervised and that most of the unsupervIsed children live in rural areas, consídered safe. Suppose that the standard deviation is 1.8 hours and the amount of time spent alone is normally distributed. We randomly survey one 4-year-old living in a rural area. We are interested in the amount of time the child spends alone per day. O Part (a) O Part (b) O Part (c) Find the probability that the child spends less than 1 hour per day unsupervised. Write the probability statement. What is the probability? (Round your answer to four decimal places.)

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: The objective of this question is to test the claim that there is a significant difference between…

Q: The standard deviation of the sample  1,1,1,2,3,3,3 is

A:

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Sample mean (x̅1) = 42.8Sample mean (x̅2) = 40.9Sample size (n1) = 34Sample size (n2) = 41Standard…

Q: An advertising agency has stated that 20% of all television viewers watch a particular program. How…

A: From the provided information, An advertising agency has stated that 20% of all television viewers…

Q: In a class of 25 students, 24 of them took an exam in class and 1 student took a make-up exam the…

A: 1)The new student score increases the average score.

Q: The term "Freshman 15" refers to the claim that college students typically gain 15 lb during their…

A: Let X be the random variable denoting that the amounts of weight that male college students gain…

Q: unts of weight that male college students gain during their freshman year are normally distributed…

A: Given that.   X~N( μ , ?^2 )   μ=2.3     , ?=10.2   Z-score =( x - μ )/?

Q: In 2001 there were 869 road fatalities in Virginia, according to the Virginia Department of Motor…

A:

Q: A report about how American college students manage their finances includes data from a survey of…

A: From the provided information, Sample size (n) = 500 Sample mean (x̅) = 825 Sample standard…

Q: A report about how American college students manage their finances includes data from a survey of…

A:

Q: The heights of 18 year old men are normally distributed with a mean of 67 inches and a standard…

A: Given information- Population mean, µ = 67 inches Population standard deviation, σ = 3 inches We…

Q: A researcher wish to test the claim that the average cost of tuition and fees at a four year public…

A: Null hypothesis: H0 : μ = 5700 Alternative hypothesis: H1 : μ >5700 Obtain the test statistic…

Q: Describe  the scores in a sample  that has a standard  deviation of zero

A: If the standard deviation is zero there will be no dispersion of scores from the Mean. It means that…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: normally distributed with a mean of  500μ=500 standard deviation of  100σ=100we have to find out…

Q: a survey found that 21% of Americans watch fireworks on television on July 4.  Find the mean,…

A: According to the given question, a survey found that 21% of Americans watch fireworks on television…

Q: Furnace repair bills are normally distributed with a mean of 267 dollars and a standard deviation of…

A: Sampling Distribution of a Normal Variable :  Given a random variable X. Suppose that the…

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: We want to test the hypothesis

Q: uppose 4-year- unsu day unsupervised reas, considered safe. Suppose that the standard deviation is…

A: Given, Mean = 3 Standard deviation = 1.8

Q: What is the Standard Deviation?

A: You want to know about standard deviation.We will deeply understand the meaning of standard…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.