What is the mean of the data below? The following are the scores of grade 10-Caluag in a 30-item quiz. 28 17 19 21 22 12 20 16 21 12 24 28 15 13 29 27 19 21 18 23 19 20 19 25 17 26 20

Q: 6. Assume that there are only three possible levels of education: "low", "middle" and "high". Among…

A: 6) Given:Three possible levels of education.1. Low2. Middle3.HighHere two categories are…

Q: Experiment: Selecting a single card from a standard playing deck. Which has 4 suits (Hearts, Clubs,…

A: The question is about probability Given : Event A : Pulling an even number card  Event B  : Pulling…

Q: Given a random variable Z with a standard normal distribution, calculate the following probabilitie…

A: Given that  The random variable Z follow a standard normal distribution.   P(Z is less than -2.11)…

Q: (b) Estimate the percentage of amounts that were greater than $50.40. Round the answer to one…

A: Given information: The average weekly amount spent on lunch as $45.08 and the standard deviation is…

Q: Answer the following probability questions: What is the probability that an even number appears on…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: USE SALT (a) P(0 ≤ Z ≤ 2.21) (b) P(0 ≤ Z ≤ 2) (c) P(-2.90 ≤ Z ≤ 0)

A: It is given that Z be a standard normal random variable with mean 0 and variance 1.   Note: (1).…

Q: D. Identify the statement if its TRUE or FALSE. 4. If we rejected the null hypothesis at the a=…

A: 4. The null hypothesis at the α= 0.01. That is p < 0.01 Therefore, p < 0.05 Thus reject at…

Q: 1. The average grade of the whole class under study is 82.15. Whole class: Average grade (82.15):

A: Note: Thank you for the question. Since multiple questions are posted, we are answering the first…

Q: the weight of a batch of strawberry jam manufactured in a particular factory is normally distributed…

A: Given data The weight of a strawberry jam at a particular factory are normally distributed with mean…

Q: Refer to the accompanying table, which describes results from groups of 8 births from 8 different…

A:

Q: Determine the written description of the complement of the given event. When 12 televisions are…

A:

Q: a. What is the appropriate degrees of freedom? [Select ] b. What is the 90% confidence interval for…

A: here given ,  n = sample size  =  8 sample mean = x = 37.8  C sample standard deviation  = s = 1 C

Q: B. Determine the Mean, Variance and Standard Deviation of each random variable. 1. y 0 1 2 3 4 P(y)…

A:

Q: a. Suppose that the mean retail price per litre of unleaded petrol in the greater region of Sydney…

A:

Q: Do the test of the hypothesis  H0 : μ1 = μ2 vs H1 : μ1 ≠ μ2. Use the significance level α = 0.05.…

A: x11 [1] 38.00 26.00 35.00 27.00 14.00 4.00 58.00 55.00 34.00 15.00 28.00 38.00 14.00 3.00 19.00…

Q: 3) Suppose the annual savings (in millions of euros) of a specific household is a random variable,…

A: Let, X: Annual saving of specific household Mean=μ=5 S.D.=σ=1 n=random sample=16 X~N(μ=5,σ=1) Then…

Q: 4. The mean weight of new born babies is at most 0.5 kg. 5. The average IQ of grade eleven student…

A: Null hypothesis: The hypothesis which tested for its possible rejection is called a null hypothesis.…

Q: In a certain high school, it is believed that students having a weight of more than 125 lbs is…

A:

Q: A committee has ten members. There are two members that currently serve as the​ board's chairman and…

A:

Q: 1. !--- Which of the following assumptions is not needed for 3 to be an unbiased estimate of the…

A: Regression model: This statistical technique is used frequently in predictive statistics. It depicts…

Q: Only about 17% of all people can wiggle their ears. Is this percent higher for millionaires? Of the…

A:

Q: An investigator is interested in the wages of married couples. She knows that the hourly wages of…

A: Solution

Q: A population consists of the four numbers 3, 4, 5, 9 with mean = 5.25 and variance = 5.1875.…

A: The objective is to find the mean of the sample mean. Sample mean(x) 3 3.5 4 4.5 5 6 6.5 7 9…

Q: There are two male rats and two female rats living in a cage. We se- lect randomly two rats from…

A:

Q: The probability that a person in the United States has type B* blood is 10%. Three unrelated people…

A:

Q: Perform the indicated calculation. 6P3 11P4 6P3 11 P4 = (Round to four decimal places as needed.)

A:

Q: For a sample with s = 9, a score of X = 67 corresponds to z = +1.00. What is the sample mean? M = 58…

A: Given : s=9 X=67 z=+1.00

Q: . Find the probability that it weighs between 750 and 850 grams. ✓ [ Select ] 0.3849 0.4200 0.7794…

A:

Q: A company is interested to receive feedback from customers visiting three different super- markets:…

A: Given that: Three different supermarkets: A, B and C.

Q: b. Estimate the correlation coefficient.

A: The provided information is  x y xy x2 y2 0.66 7.32 4.8312 0.4356 53.5824 1.32 12.22 16.1304…

Q: P(Z is between -1.20 and 1.15) = ✓ [Select] 0.7599 4 0.98257 0.1157 0.5833

A:

Q: Which value of r would be appropriate for the scatter plot shown?

A: here use given scatter plot

Q: In a test of a printed circuit board using a random test pattern, an array of 6 bits is equally…

A: Given An array of 6 bits is equally likelyto be 0 or 1

Q: Heart failure is due to either natural occurrences (89%) or outside factors (11%). Outside factors…

A: Given that n =18 , p=0.11 Find ( a ) P ( X =3 ) =? ( b )  P( X> =3 ) = ? ( c ) Mean =?…

Q: Distinguish the correlation shown in the graph below. Summarize why it is the chosen correlation. S…

A: The correlation shown in the graph is the Pearson correlation. The Pearson correlation denotes a…

Q: Given two normal random variables: X-Normal(μ-10,0=7) and Y~Normal(u=20,o=22). When X and Y are…

A:

Q: A simple random sample of 240 people was asked if they have insurance coverage, and 90 replied that…

A: Given: Random sample size (n ) = 240 x = 90 replied Confidence level  = 95 %

Q: Upstate Airlines 43 5 If one of the 87 flights is randomly selected, find the probability that the…

A: It is given that  Total number of flights = 87 The number of an Upstate airlines and which were on…

Q: Physicians say that the normal temperature of a person's body is 37°C. In a sample of 8 adults, the…

A: Given information n = sample size  =  8 sample mean = x = 37.8  C sample standard deviation  = s = 1…

Q: Suppose that P(z>a)=0.85. What is the value of a? NOTE: a. You are advised to draw the normal…

A:

Q: In a study to investigate whether women are really more talkative than men, the difference in the…

A: The question is based on paired t test Given : No. of randomly selected couples ( n ) = 56 ∑i=156 di…

Q: Flavor Sizes Moist vanilla Red velvet Chocolate Small 0.03 0.02 0.03 Medium 0.10 0.05 0.07 Large…

A:

Q: Let the variable X be someone's disease status X = D then someone has strep throat X = Dc then…

A:

Q: A researcher claims that based on the information obtained, 17% of young people ages 9-19 are obese.…

A: Given : Sample size  of young people ages 9-19 (n) = 200 Let X : No. of  of young people ages 9-19…

Q: The error involved in making a certain measurement is a continuous rv X with the following cdf. 0…

A:

Q: onsider a population that has a score of X = 15 associated with a z-score of +1.50. What does this…

A: Given that

Q: A population consists of the four numbers 3, 4, 6, 8 with mean = 5.25 and variance =3.6875 Consider…

A: a) Solution:

Q: Standard deviation=4, Zscore=1.96 at %95, level of precision= ±1.2 (1 point 2). According to this…

A: The provided information is  σ=4 z=1.96 α=0.05 Level of precision  E=±1.2   The sample size is…

Q: 00:19:01 Buyer's digest rates thermostats manufactured for home termperature control. 20 thermostats…

A: Given:  Variance = 11 Sample size  = 20 Confidence level = 90% To calculate  90 % confidence…

Q: Thirty percent of all customers who enter a store will make a purchase. Suppose that six customers…

A: Given that  Thirty percent of all customers who enter a store will make a purchase. P = 30% = 0.30…