6. Mary ranks 10th in a class of 40. Her percentile rank is O A. 90 В. 75 О С. 25 О D. 10

Q: A study of 1000 adults in Indiana State revealed that 19.9 percent are smokers. The population, the…

A: In Indiana State, a survey of 1000 people found that 19.9% of them smoke. The variables of interest,…

Q: LOCA- TION 1 DATA 49 POINT LOCA- 13 TION DATA 78 2 63 14 78 3 63 15 78 4 68 16 80 70 17 83 6 72 18…

A: here total observations = n = 24  no. of observations below 90 = 20 percentile of 90 = ?

Q: A botanist wants to know if two different soils lead to different levels of evaporation in plants.…

A: In this case, Each of the plants is used in both soils, she can use a paired samples t-test to…

Q: 5. What percent of the sophomores watch TV for at least 15 minutes per night?

A: Following statistics is given for TV time   Minimum = 0 minutes Q1 = 15 minutes Q2 = 60 minutes Q3 =…

Q: a. Determine the 30th percentile. P30 Round to three decimal places if necessary b. Determine the…

A:

Q: 2. 125 young adults were asked the number of times per week they ordered take-out. The (incomplete)…

A: Total frequency = 125 Relative frequency = frequency/125

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: 1. 180 part-time students were asked how many courses they were taking this term. The (incomplete)…

A: Given , Total number of students 180.

Q: What is the population parameter of interest?   A. The score on the survey that corresponds to…

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

Q: Farmer Joe has a theory. He believes that cows produce more milk when listening to upbeat music. He…

A: The question is about confidence interval Given : Randomly selected no. of cows ( n ) = 15 Data:…

Q: A school held a jump-roping contest. Diego jumped rope for 20 minutes. Jada jumped rope for 15…

A: detailed solution is given below

Q: 4. Sophia scored at the 10th percentile (P10) on exam 1. She claims that this means she outperformed…

A: Given, Sophia scored at the 10th percentile on exam.

Q: Dr. Salim is a dentist. Identify the the average number of cavities that his patients have from the…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: O A. Ho p=5.8% H4: p>5.8% O B. Ho p=5.8% H7: ps5.8% O C. Ho p=5.8% H p<5.8% O D. Ho p= 5.8% H1:…

A: Option a) is correct.

Q: The third quartile of 100, 140, 170, 110, 155, 220, 155, 125 is: O a. 166.25 O b. 145 Oc There is no…

A: A quartile is a measure of partition, which divides the data into equal parts. Quartile divides the…

Q: 3. Suppose that you randomly picked 100 iPhones and calculated the average battery life for these…

A: The objective is to guess the average battery life of 100 iPhones.

Q: 3. The lower quartile is equal to O A. 2nd decile O B. 2nd quartile C. 25th percentile D. 50th…

A: The first quartile (or lower quartile), Q1, is defined as the value that has an f-value equal to…

Q: Reviewing the sample of offspring of "highly irradiated" male radiologists 92 were female and 53…

A: The total number of offspring in the sample can be calculated as:

Q: A new drug designed to reduce fever is being tested for efficacy and side effects. Ten patients…

A: Given that, Sample size n=10 The mean of the difference is d¯=2.85 Standard deviation of difference…

Q: 5. What percentage of the children watched TV between 20 and 30 hours per week? 6. The Mode is the…

A: The percentage of favorable outcomes out of total outcomes can be calculated by multiplying the…

Q: . The averages of the Top 10 students in your class are as follows:   88, 89, 90, 91, 91, 92, 93,…

A: The averages of the Top 10 students in your class are as follows:   88, 89, 90, 91, 91, 92, 93, 94,…

Q: D. 3rd Quartile E. 7th Decile F. 65th Percentile also this

A: Median is the middle value that seperates the data into two equal halves. Percentile is the measure…

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: A survey of 100 fatal accidents showed that 26 were alcohol related. Find a point estimate for p,…

A: Given information: Sample size of the survey of fatal accidents n=100 Number of accidents that were…

Q: 8. In a 60-item test. Anthony got a score of 48. Which is the 3rd quartile. This means that A. He is…

A: Given 3rd quartile=48

Q: The data set {2,5, q, 10, 13, 16} has mean i = 9. Find the value of q.

A:

Q: The length of fish were measured at 3 different lakes.  Lake 1:  3.5, 4.2, 6.1, 5.2 Lake 2: 5.1,…

A: The length of fish measured at 3 different lakes are as follows: Lake 1 Lake 2 Lake 3 3.5 5.1…

Q: a. Percentage the cross-tabulation and describe whether or not there appears to be a relationship…

A: The given summary table is as follows:

Q: Calculate 90th percentile for Z.

A: 90th percentile of a standard normal distribution is that 90% of the total area lying below a…

Q: 2. Which of the following is also equal to median score?*   75th percentile 5th decile 3rd…

A:

Q: I. Read each item and choose the correct answer. Write your answer before the number. 1. If you…

A: Percentile is the value below which a given percentage of observations is expected to fall. If a…

Q: What is the value of the test-statistic (the "t-test" value)? Student A.-9.60 OB.-2.67 OC.-3.20…

A: Student Anxiety Before Movie Anxiety After Movie 1 6 7 2 8 8 3 2 5 4 1 6 5 5 7 6 4…

Q: The average grade for a group of students in a statistics exam was 85 points, with a standard…

A: The mean is 85 points and standard deviation is 3 points.