in the highest 2.5 percent eat?  What is the z-score

Q: 12 o.ズ こ \-525000 to ) %31

A: We find value of Vs?

Q: Find the z-score that cuts off 70% in the body on the right.

A:

Q: Find the Mean number of the percents 4.38+4.62+4.88+5.02+5.33+6.30

A: Mean is the measure of central tendency. mean of the observations is sum of observations divided by…

Q: Determine the percent of data greater than z=−1.40.

A: Know that  X~N( 0 , 1 )   μ=0  , ?=1 (for standard normal distribution)    Z-score =( x - μ )/?

Q: find the test value used to test the claim that the proportion of jellyfish stings at jones beach is…

A: Given, Sample size = 696 Sample proportion = 0.30   The null and alternative hypothesis is:

Q: Nationally, 80 percent of adults own an thermometer. You are interested in whether the same…

A: We have given that  Sample size n = 100 Sample proportion p^=75%=0.75 Population proportion…

Q: In 2016 the Better Business Bureau settled 80% of complaints they received in the United States.…

A: The objective of this question is to calculate the expected value and standard deviation of the…

Q: 18.09 is what percent of 11?

A:

Q: n the brackets, how did you know to use the 21 and 20 percentiles?

A: The number of observations, The data set…

Q: When the Standard Score = -1, what is the percentile of the raw score? %3D O 2nd 14th O 16th 34th…

A: It is an important part of statistics. It is widely used.

Q: Many athletes (and their parents) worry about the risk of concussions when playing sports. A…

A: First let us sort the head circumferences (in inches) for the players on the team; No. Head…

Q: What z value is associated with the fewest 59%? Select one: a. -0.23 b. 0.22 c. 2.22 d. 0.27 e.…

A:

Q: 95 percent divided .025 what is the z score?

A: The z-score is obtained as given below: PZ≤z=0.025z=ϕ-10.025=-1.96  Using Standard normal table

Q: What percent of scores are below a T score of 56?

A: Given, T score is 56. Now,

Q: 1980 alcohol consumption per capita in the United States? (Round to the nearest percent.)

A: Given: The data given is as follows Australia 9.7 Austria 11.1 Belgium 11.5 Canada 7.6…

Q: In 2016 the Better Business Bureau settled 80% of complaints they received in the United States.…

A: Given, in 2016 the Better Business Bureau settled 80% of complaints they received in the United…

Q: Q2: Calculate the coefficient of variation percentage of the following samples reading:…

A:

Q: What are the steps for Finding Proportions for One Score?

A:

Q: What is the percentile rank of a bag that contains 1025 chocolate​ chips?

A: The mean is 1252 and the standard deviation is 129.

Q: What would s2 = 0 tell you about your sample? What would s2 = -25.397890175675 tell you?

A:

Q: Based on the Normal model for car speeds on an old town highway N(77, 9.1), what is the cutoff value…

A: The car speeds on an old town highway following a normal distribution.i.e.

Q: competed in an ironman race, J

A: Here it is given that - 3500 people competed in an ironman race, John finished 805th,

Q: what range of raw scores makes up the middle 40%

A: The middle 40% means, the scores lie between 30th and 70th percentile. From stand normal, z-score…

Q: Find the value of X2 values that separate the middle 80 % from the rest of the distribution for 20…

A:

Q: 29 randomly selected students were asked the number of movies they watched the previous week. The…

A: Frequency distribution is a table that display the observations and the frequencies of each of the…

Q: You have a sample of 10 (sorted) scores: -15.5 -13.4 -12.7 -12.2 -12 -10 -9.1 -8.9 -7.9 -7.1…

A: From the provided information,Number of observations (n) = 10

Q: Given : Find r12,.4 =.6 ľ13.4 =.5 23.4 =.7 r12.34 and r13.24

A:

Q: 14. Estimate y; from the following data : 81 and explain why the value obtained is different from…

A: Given that : X and yx  values are given here by using these value we find missing value of yx  at x…

Q: Based on the Normal model for car speeds on an old town highway N(77, 9.1), what is the cutoff value…

A:

Q: What does it mean if the coefficient of determination is 78.2%?

A: coefficient of determination is a measure of proportion of variation in dependent variable Y…

Q: 200 patients were given therapy for a disease. 120 of them had therapy A and 80 of them had therapy…

A: The number of patients who were given therapy is 200 The number of patients who took therapy A is…

Q: What is 5% of 360?

A:

Q: The value 100 is in the 25th percentile. How many percent of the values is more than 100? a. 25%…

A: The median is middle value of the observations, above or below which 50% of the observations lie.…

Q: An ectopic pregnancy is twice as likely to develop when the pregnant woman is smoker compared to…

A: Consider EP represents the event that the women have an ectopic pregnancy.Consider S represents the…

Q: what is a z-score of 80%?

A: 80% z score:  alpha=1-0.80           =0.2 alpha/2=0.2/2               =0.1  From standard normal…

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.