In a spelling contest, the mean mark of the 32 boys was 72 with the standard deviation of 8 while the mean mark of 36 girls was 75 with a standard deviation of 6. Test at α=0.05 that there is significant difference between the performance of boys and girls in the spelling contest. Type of test : Z-computed = Z-tabular =

Q: calculate skewness from the data

A: The skewness coefficient determines if the data is positively/negatively skewed.

Q: 3. We are interested in studying the relationship between severity of COVID 19 and economic growth.…

A: Given Information: Consider the given data: County no COVID severity Index GDP Growth 1 500 0…

Q: Construct a scatter plot for these data. Based on the scatter plot, how would you describe the…

A: Given: x y 11 120 15 150 12 130 14 140 13 130 10 110 15 160 10 100

Q: ame ailment. The following data ney were completely cured. Wha reatment? (level of significance…

A: A B C D Patient 1 10 11 3 6 Patient 2 9 11 4 10 Patient 3 6 18 5 8 Patient 4 7 6 7 11…

Q: Freshmen at public universities work 12.2 hours a week for pay, on average and the SD is 10.5 hours.…

A: For Sample 1 x̄1 = 12.2 s1 = 10.5 n1 = 900 For Sample 2 x̄2 = 10.4 s2 = 9.9…

Q: 5 5 5.5 5 5.5 9 7 8 9 6 7 8 8 7 8.5 Using Jamovi, and assuming we’re testing at an…

A:

Q: Given the nulf and alterrlative hypotheses, sample means, sample sizes, and population standard…

A: The provided information is x¯1=142x¯2=132σ1=14, σ2=18n1=58, n2=65α=0.01 The null and alternative…

Q: The mean age of 31 slot mechanic player is 51.3 years, and the standard deviation is 6.8 years.the…

A:

Q: same mean weight. The ecologist catches, weighs the trout = back into the river. The table below…

A: One way ANOVA technique is applied to verify whether the means are equal for all the rivers,  the…

Q: hs since January 1st. Month Average high temperatu can model this with a periodic function of the

A: t  h 0 67 1 71 2 77 3 85 4 95 5 104 6 106 7 105 8 100 9 89 10 76 11 66

Q: Give an example or a situation of time value of money

A: Time value of money- Time value money is very important concept in finance, business as well as our…

Q: It is defined as the quotient of the sum of the squared deviations from the mean divided by N-1.…

A:

Q: Cash flow and profits are both crucial aspects of a business. Profit is the surplus revenue after…

A: It is given that: Selected no. of auditors, i.e., n (sample size)=199. And the no. of auditors with…

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: ANSWER THE FOLLOWING PROBLEMS SHOWING COMPLETE SOLUTION ENCLOSE FINAL ANSWER THANK YOU! topic TESTS…

A:

Q: a. What is the probability that at least one meteor is found 1.. a one-minute interval? b. Determine…

A: here given number of mentor per 30 seconds  = 1.81  here given scenario follow Poisson Process  for…

Q: What is the p-value if you are doing a two-tailed test?

A: We have given that  The z-statistic is, z = 1.15

Q: A factory owner wants to estimate the average hours lost due to a machine breakdown. Recording for…

A: Confidence level is 98%. Significance level is 2%. n=9 x¯=3.5s=1.5 df=n-1=9-1=8 From the excel…

Q: 3. We are interested in studying the relationship between severity of COVID 19 and economic growth.…

A: Solution: From the given information,

Q: The Gallup poll asks respondents how they would rate the honesty and ethical standards of people in…

A: Solution: YES. Because The percentage who rated medical doctors 'very high or high' is 65%The…

Q: If three donations are made, what is the probability that at least 1 of them can be safely used in a…

A:

Q: Graph the iıne. y= 3x-8 Ty 8- 6- 4 2- -8 -6 -2 2. -2- 4- -64 8 图 X

A:

Q: In a completely randomized design involving four treatments, the following information is provided.…

A:

Q: 5. Two processes A and B, were used to produce stainless steel shafts in an industrial company.…

A: Given that, Process A and Process B produce 9% and 12% nonconforming stainless steel shafts,…

Q: random sample of 25 men’s resting pulse rates shows a mean of 72 beats per minute and a standard…

A:

Q: Mr Javier, a bank manager is interested in the amount of time it takes his teller to service…

A:

Q: (b) Find an 80% confidence interval and interpret it. (c) Which interval is wider? (d) How…

A: For the given data (b) Find an 80% confidence interval and interpret it.  (c) Which interval is…

Q: If it is known that the results of the report from the production department of a Garment Industry…

A: Given that n =10 ,p =0.35

Q: What type of correlation do these results indicate? A) Negative B) Positive C) Confounding D)…

A:

Q: large group of people get together. Each one rolls a die 150 times, and counts the number of aces…

A: Given Data : sample size,n= 150 probability,p= 0.17

Q: We are performing a one-tailed hypothesis test for the population mean μ using the following pair of…

A: Given : H0: μ =10.0 vs. Ha: μ < 10.0

Q: An airline is trying two new boarding procedures, Option 1 and Option 2, to load passengers onto…

A: Solution: Given information: Option 1 sample statistic are n1= 265 x1 = 17.6 s1= 4.7Option 2 sample…

Q: College Units Frequency 0-24 4 25-49 Find the standard deviation for the grouped data. 50-74 75-99 3…

A:

Q: Which among the groups is most dispersed? Support your answer.

A: here given Four groups of students are compared according to weight with the following data: Group…

Q: In an analysis of variance where the total sample size for the experiment is nT and the number of…

A: We have given that,  In an analysis of variance where the total sample size for the experiment is nT…

Q: Indicate which correlation coefficient represents a stronger relation between two variables A) -.85…

A: We have given the following statement about correlation coefficient.

Q: O They all have the same standard deviation O They all have mean (expected value) O O They are all…

A:

Q: 16. The company Sherrin manufacturers Australian footballs. As part of their quality control, they…

A: Given, Favorable Cases, X = 60 Sample Size, n = 400 Sample proportion, p^=xn=60400=0.15 Significant…

Q: Results of the Summative Examination in Science given to the 42 G10 class during the fourth quarter…

A: The total number of students =42.

Q: Suppose 190 geology students measure the mass of an ore sample. Due to human error and limitations…

A:

Q: You are a consumer psychologist interested in holidy spending. A national census reports that the…

A: From the provided information, Sample size (n) = 16 Sample mean (x̄) = $85 Standard deviation (s) =…

Q: What are the degrees of freedom for this problem? What is the critical R value?…

A: Given: Resting Heart Rate (X) Finish Time  (Y) 54 30 65 33 60 35 60 32 75 35 70 36…

Q: The regression equation for Y is the linear equation Ý = bX + a %3D where Sy b =r М, — b. М. & a =…

A: A least square regression line is called the line of best fit.

Q: It is the more reliable average when there are extremely large or extremely small values.

A: Answer is  MEDIAN

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

A: From the provided information, Sample size (n) = 12 Level of significance (α) = 0.01

Q: In a survey, respondents were asked to indicate their favorite brand of cereal. They were only…

A:

Q: The scatter plot shows the time spent studying, x, and the midterm score, y, for each of 23…

A: For the given data Fill all the required blanks

Q: a box contain 4 apple candies and 5 orange candies. If Ana will pick one at a random what is the…

A: The number of apple candy is 4 and orange candy is 5. Total number of candy is 4+5 =9 Total number…

Q: Freshmen at public universities work 12.2 hours a week for pay, on average and the SD is 10.5 hours.…

A: Given Data : For Sample 1 x̄1 = 12.2 σ1 = 10.5 n1 = 900 For Sample 2 x̄2 =…

Q: newsboy can sell an average of 45 newspapers a day. For the last 2 weeks (14days), he sold an…

A: Given data : sample size, n =14 sample mean, x̄ = 38 sample standard deviation,s= 14…