find the z scores probability  1- left area of z score 1.23  2- area between -2 and 2 3-  right area of z score 1.5

Q: Suppose the lengths of human pregnancies are normally distributed with u = 266 days and o = 16 days.…

A: # Given : length of human pregnancy follow normal distribution with mean =266 days and standard…

Q: College Courses At a large university, the probability that a student takes calculus and is on the…

A: Let us define the two events as, A = the students takes calculus. B = the student is on the dean’s…

Q: Suppose a biologist collected data on the weight of 50 lab rats that were 3 weeks old. The boxplot…

A: We want to tell a skewness from box plot in given question

Q: Find f0.90f0.90 for FF distribution with (22,77) degrees of freedom.  f0.90=f0.90= (Round the…

A: Given that  df1 = 22 , df2 = 77  P(F > f) = 0.90

Q: Mike Brooks is required to complete 100 independent tasks a month at his on his performance, the…

A: Continuous uniform distribution: A random variable X is said to have the rectangular distribution or…

Q: The area of the rectangle depicting a uniform distribution is always equal to the mean of the…

A: The area of rectangle depicting a uniform distribution is not always mean of the distribution.

Q: Enrique buys a bag of cookies that contains 8 chocolate chip cookies, 4 peanut butter cookies, 6…

A:

Q: The average American gets a haircut every 39 days. Do college students get their hair cut less…

A: A hypothesis test is a statistical  method that uses sample data to evaluate a hypothesis  about a…

Q: GIVES THE SERVICE LOCAL WEATHER 60% RAIN FOR EACH OF THE CHANCE OF NEXT TWO DAYs. POSSIBLE OUT COMES…

A: Given that  n=2 , p=60%=0.60 , q=1-p=1-0.60=0.40 X~Binomial(n=2,p=0.60)

Q: Do twenty-year-olds have fewer cavities? The data show the results of a survey of 16…

A: Given : Claim : The population mean number of cavities for twenty-year-olds is less than 4.

Q: In the concept of Inter quartile range, Ql is at the position ---- where n is the total number of…

A: We know that,  The k-th quartile (first) of a distribution corresponds to a point with the property…

Q: using proportions what is the area below the z score of 1.11

A:

Q: Find a z-score which separate an area of 0.9000 on the right,from the remaining area on the left

A: Find a z-score which separate an area of 0.9000 on the right , from the remaining area on the left

Q: find the z scores probability  1- left area of -2.5 2- right area of 2.5

A: We have to find out z score for left of -2.5 and right of 2.5  Here we use z score table for finding…

Q: The standard deviation of a probability distribution is a measure of: the shape of the distribution…

A: We will solve the following

Q: 34 5 10 From the 5 points A, B, C, D, and E on the number line above, 3 different points are to be…

A: The answers for each of the questions are given in the next steps.

Q: O Part (d) Find the 20th percentile. (Round your answer to two decimal places.) O Part (e) Sketch…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Assume a member is selected at random from the population represented by the graph. Find the…

A: Obtain the standard z-score for the random variable X equals 200 The standard z-score for the random…

Q: t a large university, the probability that a student takes calculus and is on the dean's list is…

A: Probability of student takes calculus and on the dean's list is 0.026 Probability of student on the…

Q: Find the probability that x is between four and 10. (Round your answer to four decimal places.) X ~…

A: given data  X~N(5,2)  normal distribution μ = 5σ = 2 P(4<x<10) = ?

Q: ALL PARTS A,B,C,D,E a) Binomial (n=92, p=0.38) Make a bar chart. Calculate P(X=56), P(X<59),…

A: Note: Hey there! Thank you for the question. Although the questions you have posted are marked as…

Q: X ~ N(–5, 2) What is the median?

A: Given that  X~N( μ , ?2 )   μ= -5   , ?2 =2

Q: Find the area under the normal curve to the left of z equals -2 plus the area under the normal curve…

A:

Q: The average number of cavities that thirty-year-old Americans have had in their lifetimes is 9. Do…

A: Given that, Sample size n=16 Sample mean x¯=7.938 Sample standard deviation s=2.294 a. For this…

Q: The individual actually The data represent the results for a test for a certain disease. Assume one…

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Q: Difference between Type I and Type III sums of squares?

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Q: Waht sould we do with a large P-value?

A: The P-value is the probability we get the value of the test statistic, or something "more extreme"…

Q: Find the P-value interval for the test value.                      ?2=19.222χ2=19.222  , n = 11,…

A: We have to find p value..

Q: Find the probability that x is between four and 13. (Round your answer to four decimal places.) X ~…

A: Given,mean(μ)=5standard deviation(σ)=3

Q: Suppose that the time between arrivals of customers at a bank during the noon-to-1 p.m. hour has a…

A: Let X be the time between arrivals of customers at a bank during the noon-to-1 p.m hour.Given that X…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.