Find the area in the left tail more extreme than z=-1.68 in a standard normal distribution. Round your answer to three decimal places.

Q: Use the Empirical Rule. (Do not use technology. Technology will give a slightly different answer.)…

A: Mean = 9.5 std dev = 1.1

Q: The average on a history exam (scored out of 100 points) was 85, with a standard deviation of 15. Is…

A: The average on a history exam (scored out of 100 points) was 85, with a standard deviation of 15.…

Q: Using a z-table find the Z score for the 20th percentile and the 99th percentile

A: Here we have to find the 20th percentile and 99th percentile using Z table. Where Z is standard…

Q: Find the proportion of Normally distributed observations with a zz-score above 0.84. Give your…

A: Let Z be the random variable from normal distribution with z-score above 0.84 then we will find the…

Q: The per capita energy consumption level (in kilowatt-hours) in a certain country for a recent year…

A: Givenμ=2332σ=570.5

Q: The distribution of the lengths of a commercially caught fish has a mean 25 cm and standard…

A: Let , X be the lengths of a commercially caught fish with mean μ=25 cm and standard deviation σ=5 cm…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ= 105 and a standard…

A: Step 1: Given that, Adults IQ scores are normally distributed withmean: μ=105, standard deviation:…

Q: Find the proportion of Normally distributed observations with a z-score below 2.56. Give your answer…

A: Given Z=2.56

Q: Find the proportion of Normally distributed observations with a zz-score below 3.48. Give your…

A: Let Z be the random variable from standard normal distribution with mean (μ) = 0 standard deviation…

Q: e is trying to figure out a way to decrease the standard error of the mean when planning a t-test…

A: The standard error  of the mean can be calculated as: SE=σn Here, σ = Standard deviation n = Sample…

Q: It takes an average of 10.2 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: From the provided information, The hypotheses are as follow: H0: µ = 10.2 H1: µ < 10.2 The test…

Q: Answer the following The image on the left shows the standard normal distribution curve (with u=0…

A:

Q: The mean of a normal set of data is -5.4 and the standard Deviation is 22.5 sketch a normal curve…

A: We have to plot a Normal curve with the given data  , Mean = -5.4 standard deviation = 22.5.

Q: A pregnancy that continues for longer than 42 weeks is called a post-term pregnancy. What's the…

A: It is given that data is normally distributed with mean=266 days and standard deviation =16 days We…

Q: each set of data, use the calculator to find the mean (xbar) and standard deviation (sx) 23, 14 ,65…

A:

Q: Find the area of the shaded region. The graph depicts the standard normal distribution of bone…

A: Required probability is P(-0.85<Z<1.25)

Q: Please count it manually without using excel so I can learn how to calculate it 3. A landlord is the…

A: ANOVA: The analysis of variance (ANOVA) is used to determine whether there are any statistically…

Q: onsider yourself as a Math tutor to Grade 11 students. Study carefully the examples of real-life…

A: Real-life problem: A company produces light bulbs that have a mean lifespan of 2000 hours and a…

Q: The average American gets a haircut every 34 days. Is the average different for college students?…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: The following figure shows the normal distribution with the proportion of the area under the normal…

A: Solution

Q: (a) The standard normal curve is graphed below. Shade the region under the standard normal curve to…

A:

Q: Scores of on a math test were normally distributed with a mean of 82 and a standard deviation of 6.…

A: The importance of standard normal curve lies in the fact that one has not to tabulate probability…

Q: Consider yourself as a Math tutor to Grade 11 students. Study carefully the examples of real-life…

A: We have to formulate one real-life problem involving normal distribution by presenting the given…

Q: Time for pizza delivery by a certain restaurant follows a uniform distribution and can range from 20…

A: We have to find 60% of the time, the delivery time will fall above  what value ....

Q: Find the proportion of Normally distributed observations with a z-score above -1.93. Give your…

A:

Q: Based on the Histogram, describe the distribution of the variable "WPM." Is it symmetric, skewed…

A: Based on Histogram it seems that :It is skewed right and bimodal.

Q: the mean is 7.0 the median is 6.5 , and the mode is 6.0 how would you describe this distribution in…

A: It is given that, the mean is 7.0, the median is 6.5, and the mode is 6.0.

Q: https://www.youtube.com/watch?v-OHR126AFFBU Use the Empirical Rule. (Do not use technology.…

A: We have to find out given probability...