Ten individuals are chosen at random from a normal population and their heights are found to be 63, 63, 66, 67, 68, 69, 70, 70, 71, 71 inches. At 5% level of significance, test if the average height is less than 68 inch?

Q: esearch scientist wishes to test the claim that the mean number of units taken by community college…

A: From the given information, We see that no information about the normality of the population is…

Q: The mean score on a set of 25 tests is 76. What is the sum of all the test​ scores?

A: The mean (aka the arithmetic mean, different from the geometric mean) of a dataset is the sum of all…

Q: Find the Zc value for a 92% confident interval when the sample sizes 27

A:

Q: What scale of measurement is being used when a teacher measures the number of correct answers on a…

A:

Q: Which number best approximates risk associated with tea drinking in men?

A: Tea drinking cancer patients in men = 140Total cancer patients in male = 200Tea drinking other…

Q: Find the range , the standard deviation, the variance for 45, 75, 84, 58, 81, 65 , 98,63,76

A: Range = Maximum - Minimum = 98 - 45 = 53   The standard deviation can be determined using the…

Q: A sample has SS= 20 and s? = 4. How many scores are in the sample?

A: Six scores are in the sample.

Q: Use Chebyshev's theorem to solve the problem. Find the least possible fraction of numbers in a data…

A: Consider that a random variable X has expected value μ and standard deviation, σ. Now, according to…

Q: find the z-number associated with a 92% level of confidence. find the z-number associated with a…

A:

Q: The average number of cavities that thirty-year-old Americans have had in their lifetimes is 8. Do…

A: As per guidelines expert have to answer first question three subparts only dear student please…

Q: Use the blood Alcohol Concentration chart to determine the likelihood a 140 pound (lbs) female will…

A: Solution: Given data, R = 6e (12.77x)

Q: On his 5 tests, Ahmad earned a total of 450 points. What was his mean number of points earned per…

A: The objective of this question is to find the mean number of points Ahmad earned per test. The mean…

Q: there is 70% chance they should hit atleast how many pitches this season?

A: Given that, there is 70% chance they should hit.

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: The mean earning of men in Florida differs significantly from the mean earning of men in Texas. If…

A: Sample sizesn1 is 123 and n2 is 88.

Q: The value of the stanard error of the mean for the scores :  1,2,3,4,5 ?

A: Solution: Let X be the random variable. The given data is 1, 2, 3, 4 and 5.

Q: The mean of 14 numbers is 49. Removing one of the numbers causes the mean to decrease to 43. What…

A: given data:mean =49n=14 Removing one of the numbers causes the mean to decrease to 43new total…

Q: At the local college, a study found that students earned an average of 8.5 credit hours per…

A: Given, the average credit hour per semester is 8.5. The sample size is 127 students.

Q: We are asked to find the values that separate the middle 60% of the population from the top and…

A: In a normal distribution, the z-score is a measure of how many standard deviations an element is…

Q: Experts claim that 10% of murders are committed by women.  In a random sample of 67 murders, 10 were…

A:

Q: The runs scored by a batsman in 5 ODIs are 31, 97, 112, 63, and 12. Find the standard deviatio

A: Given data, 31, 97, 112, 63,12 Find the standard deviation   To find the standard deviation first…

Q: The scores on a statewide chemistry exam were normally distributed with ?=73.08 and ?=6. Gabriela…

A: Given data isMean(μ)=73.08standard deviation(σ)=6

Q: In a class of 10 students, James got 3rd position from the lowest. What is his percentile rank?

A: Given data: In a class of 10 students, James got 3rd position from the lowest. To find: What is his…

Q: A card is randomly drawn from a deck of 52 card with replacement 456 times. Find the mean of the…

A: Total number of cards = 52 Number of hearts = 13 Let p = P(heart)= 13/52 = 1/4 = 0.25

Q: Mina is waiting in line at the Department of Motor Vehicles (DMV). Her wait time is in the 85th…

A: It is clearly given in statement that at Department of Motor Vehicles waiting line is Mina wait time…

Q: Ten students take a 10-point test. The mean score is 8. Could the median be 10? Could the median be…

A: Solution-: Ten students take a 10-point test. The mean score is 8. Could the median be 10? Could the…

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: Find the 90th percentile. So 10% of the T

A: Let X be the lifetime of LCD TV sets follows an exponential distribution with a mean of 100,000…

Q: Find the probability that the mean for 20 randomly selected distances is greater than 195.70 cm.

A: Given that.   X~N( μ , ?)   μ=197.5     , ?=8.9   Z-score =( x - μ )/?

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.