A college counsellor wants to test whether the average full-time student spends more than 18 hours each week studying. He randomly samples 68 students and asks them how many hours they study in a week. The mean of the resulting scores is 20 hours and the standard deviation of 6.5 hours. Conduct an appropriate directional test. Which of the following is the obtained pp-value?   A. 0.9932 B. 0.0135 C. 0.3796 D. 0.0067

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: The number of assists per match for the setter on IVC's volleyball team has a mean of 51 and a…

A: Given information- Population Mean µ = 51 Standard deviation (σ) = 13 We have to find the number of…

Q: Calculate the sample standard deviation for this data set: 88, 73, 91.

A: From the provided information, 88, 73, 91 The sample mean of the data can be obtained as:

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: Identify the data value corresponding to the indicated percentile. The heights of women are normally…

A: According to the provided information,

Q: 5.) If you choose 50 companies, what is the probability that the percent gain of the company is…

A:

Q: A clinical trial tests a method designed to increase the probability of conceiving a girl. In the…

A: From the given information, Total number of births = 380 Number of baby girls = 323 Probability that…

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: The given data is as follows:Population mean, Population standard deviation,

Q: The GMAC Insurance company reported that the mean score on the National Drivers Test was 67.5 with a…

A:

Q: Dougal is filling out college applications that require either a SAT math score or ACT math score.…

A: Given Information: Dougal has an SAT math score of 610 and an ACT math score of 27. Mean SAT math…

Q: Two students, Will and Tom, want to find out who scored relatively higher on a science midterm. The…

A: We have to find z score and Which student scored higher on the midterm when compared to their…

Q: Laura learned that the average GPA in her school is 3.6 with a standard deviation of 0.3. If her GPA…

A: From the given information,   Mean = 3.6 Standard deviation = 0.3   The objective is to find the…

Q: distribution of the height of a tomato plant is normal with population mean of 50 inches. The 80th…

A: Provided data is, distribution of the height of a tomato plant is normal with population mean of 50…

Q: Scores on a test have a mean of 6 and a standard deviation of 9. Michelle has a score of 57. Convert…

A:

Q: Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A: It is given that readings on the thermometers is normally distributed with mean 0 and a standard…

Q: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

A:

Q: Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the…

A: The objective of this question is to find the height of a man given the z-score, the average height,…

Q: Provide an appropriate response. A manufacturer claims that the mean lifetime of its fluorescent…

A:

Q: Plastic waste data lists weights of plastic discarded by households.The highest weight is 5.28lb and…

A: Highest= 5.28 Mean= 1.911 Standard deviation= 1.065 How many standard deviation is the difference=?

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: GivenHighest speed measured (x)=78.4Mean(x)=18.37standard deviation(s)36.54

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A: NOTE: Since we only answer up to 3 subparts , we will answer the first 3. Please resubmit the…

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

A: It is given that the mean and standard deviation are 105 and 15, respectively.

Q: A person completes a timed task and is told that their z-score for the task is 1.36. The mean for…

A: Given: Population mean (µ) = 10.75 Population standard deviation (σ) = 2.40 z-score = 1.36

Q: A successful basket ball player has a height of 6 feet 4 inches. Based on statistics his height…

A: As given, The basketball player has a height of 6 feet 4 inches and when his height is converted to…

Q: The average cost of a car rental is $0.32 per mile.  The standard deviation is $0.03.  Using…

A: Range = μ - kσ ,  μ + kσ

Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest…

A:

Q: A student graduated from a 4 -year college with an outstanding loan of $9563 where the average debt…

A:

Q: As a group, the Dutch are among the tallest people in the world. The average Dutch man is 184 cm…

A: given data normal distribution μ = 184σ = 8P(170<x<180) = ?

Q: Test scores for a history class had a mean of 69 with a standard deviation of 4.5. Test scores for a…

A: The objective of this question is to determine on which test the student performed better by…

Q: b. 7 miles

A:

Q: A student scores 74 on a geography test and 264 on a mathematics test. The geography test has a mean…

A: The mean and standard deviation of geography test are 80 and 5, respectively.

Q: The GMAC Insurance company reported that the mean score on the National Drivers Test was 77.8 with a…

A:

Q: The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 80…

A:

Q: Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The…

A: The standard deviation of students lab measurements is 8. Juan repeats the measurement 2 times. That…

Q: 11. Find the area of the shaded region. The graph depicts IQ scores of adults, and those scores are…

A: Normal Distribution : A random variable x is said be normal distribution with the probability…

Q: Find the indicated IQ score.

A: Let X denote the IQ scores of adults. Given that X follows N(mean = 100, SD = 15)

Q: A study was commissioned to find the mean weight of the residents in certain town. The study found…

A: The provided information is  x¯=174The margin of errorE=7 The true mean weight of the residents of…

Q: Which of the following answers is correct and why? I really need an explanation for this question.

A: Given : Before the training (X) : mean = 402 Standard deviation = 40   After the training (Y) : mean…