The cholesterol level in children aged 10-15 is assumed to follow a normal distribution with a...

The cholesterol level in children aged 10-15 is assumed to follow a normal distribution with a mean of 175 and a standard deviation of 20.

What is the probability of selecting a child at 10-15 years with cholesterol level higher than 190?

What is the probability of selecting a child at 10-15 years with cholesterol level between 165 and 190?

What is the interval of cholesterol level of a child 10-15 years higher than 75% and lower than top 10% of children?

Expert Solution

for further query please comment below.thank you

orchestra answered 1 year ago

the height in children aged 10-15 is assumed to follow a normal distribution with a mean...

the height in children aged 10-15 is assumed to follow a normal distribution with a mean of 165 with a standard deviation of 15. c)what proportion of children 10-15 years of age have height less than 145? d)what proportion of children 10-15 years of age have height between 125 and 210? e)how tall does a child 10-15 years of age have to be shorter than 95% of children? f)how tall does a child 10-15 years of age have to be...

The IQ scores of children in a city are assumed to follow a normal distribution with...

The IQ scores of children in a city are assumed to follow a normal distribution with unknown mean μ and known variance σ^2. A random sample IQ scores with a size of 25 is drawn by a researcher. Based on this sample, a 97% confidence interval for μ is found to be (91.49,104.51). (a) Show that σ=15. (b) Another random sample of IQ scores with a size of 11 drawn and the scores are recorded as follows: 134, 95,102, 99,...

The LDL cholesterol level of all men aged 20 to 34 follows the Normal distribution with...

The LDL cholesterol level of all men aged 20 to 34 follows the Normal distribution with mean μ=120μ=120 milligrams per deciliter and the standard deviation is σ=30σ=30 milligrams per deciliter. If you choose an SRS of 25 men from this population, what is the sampling distribution of mean cholesterol level of the 25 selected men. Select one: a. x¯∼N(120,1.2)x¯∼N(120,1.2) b. Couldn't decide c. x¯∼N(120,30)x¯∼N(120,30) d. x¯∼N(120,6)

Cholesterol levels for a group of women aged 50-59 follow an approximately normal distribution with mean...

Cholesterol levels for a group of women aged 50-59 follow an approximately normal distribution with mean 216.57 milligrams per deciliter (mg/dl). Medical guidelines state that women with cholesterol levels above 240 mg/dl are considered to have high cholesterol and about 29.6% of women fall into this category. 1. What is the Z-score that corresponds to the top 29.6% (or the 70.4-th percentile) of the standard normal distribution? Round your answer to three decimal places. 2. Find the standard deviation of...

Cholesterol levels for a group of women aged 30-39 follow an approximately normal distribution with mean...

Cholesterol levels for a group of women aged 30-39 follow an approximately normal distribution with mean 190.14 milligrams per deciliter (mg/dl). Medical guidelines state that women with cholesterol levels above 240 mg/dl are considered to have high cholesterol and about 9.3% of women fall into this category. 1. What is the Z-score that corresponds to the top 9.3% (or the 90.7-th percentile) of the standard normal distribution? Round your answer to three decimal places. 2. Find the standard deviation of...

The amount of a loss, Y, is assumed to follow a Normal distribution with a mean...

The amount of a loss, Y, is assumed to follow a Normal distribution with a mean of ? and a variance of ?^2. The median of Y is 56.5 and the 59.1-th percentile of Y is 56.776. Determine P(Y > 60 ).

The score on a proficiency measure is assumed to follow a normal distribution. A switch to...

The score on a proficiency measure is assumed to follow a normal distribution. A switch to better lighting might change the score. A random sample of 30 people taken during the year before the switch to better light yielded a mean score of 600 and a variance of 400. A different random sample of 30 people after the switch had a mean of 610 and a variance of 441. Important: use a degrees of freedom nu=80 for the t statistic....

The distribution of blood cholesterol level in the population of young men aged 20 to 34...

The distribution of blood cholesterol level in the population of young men aged 20 to 34 years is close to Normal with standard deviation σ = 45 milligrams per deciliter (mg/dL). You measure the blood cholesterol of 12 cross-country runners. The mean level is x = 172 mg/dL. Assume that σ is the same as in the general population. How large a sample is needed to cut the margin-of-error in half for a 90% confidence interval of the mean level...

Suppose the current measurements in a strip of wire are assumed to follow a normal distribution...

Suppose the current measurements in a strip of wire are assumed to follow a normal distribution with a mean of 10 mA and a variance of 4 (mA)^2. a. What is the probability that a measurement will exceed 13 mA? b. What is the probability that a current measurement is between 9 and 11 mA? c. Determine the value for which the probability that a current measurement is below this value is 0.98. Please show all steps and explanations. Thank...

1. Glucose levels in patients free of diabetes are assumed to follow a normal distribution with...

1. Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean of 120 and a standard deviation of 16. What is the probability that the mean glucose level is LESS THAN 115 in a sample of 12 patients? Group of answer choices a.1.08 b.0.8599 c.0.1401 d.-1.08 2. I cant seem to find the right answer here Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean...

Question