The average fruit fly will lay 424 eggs into rotting fruit. A biologist wants to see if the average will change for flies that have a certain gene modified. The data below shows the number of eggs that were laid into rotting fruit by several fruit flies that had this gene modified. Assume that the distribution of the population is normal. 406, 438, 395, 402, 404, 436, 411, 414, 440, 420, 419, 416, 415, 438, 437 What can be concluded at the the αα = 0.10 level of significance level of significance? For this study, we should use Correct The null and alternative hypotheses would be: H0: ____ H1 :____ The test statistic ____ Correct = (please show your answer to 3 decimal places.) The p-value _____ = (Please show your answer to 4 decimal places.)

In Major League baseball, the speed of a pitch is very important. How fast is the speed of a major league pitcher’s average pitch? A researcher took a random sample of the speed of 16 pitches from the 2019 Major League baseball season. The following are the speeds of these pitches in miles per hour: 92.8, 87.0, 89.1, 96.2, 75.6, 89.6, 92.5, 83.3, 86.5, 95.6, 94.1, 91.6, 94.2, 93.4, 90.0 It is reasonable to treat these measurements as coming from a normal distribution with unknown mean μ and unknown standard deviation σ d) Find the sample standard deviation of the above data e) Find the sample median of the above data. f)Create a 90% confidence interval for μ. ( , )

In Major League baseball, the speed of a pitch is very important. How fast is the speed of a major league pitcher’s average pitch? A researcher took a random sample of the speed of 16 pitches from the 2019 Major League baseball season. The following are the speeds of these pitches in miles per hour: 92.8, 87.0, 89.1, 96.2, 75.6, 89.6, 92.5, 83.3, 86.5, 95.6, 94.1, 91.6, 94.2, 93.4, 90.0 It is reasonable to treat these measurements as coming from a normal distribution with unknown mean μ and unknown standard deviation σ a)Use the data to calculate an unbiased point estimate of the true mean, μ, of pitch speeds in the 2019 Major League baseball season. b)Use the data to find an unbiased point estimate of the population variance, σ2 of pitch speeds in the 2019 Major League baseball season. c) Use the data to find the maximum likelihood estimate of the population variance, σ2 , of pitch speeds in the 2019 Major League baseball season.

Solve the following and get the range and variance with the data 25,27,30,32,32,40,45,46,47,48

The average fruit fly will lay 377 eggs into rotting fruit. A biologist wants to see if the average will be greater for flies that have a certain gene modified. The data below shows the number of eggs that were laid into rotting fruit by several fruit flies that had this gene modified. Assume that the distribution of the population is normal. 367, 374, 364, 388, 407, 369, 375, 362, 403, 383, 381, 391, 371 What can be concluded at the the αα = 0.10 level of significance level of significance?    The test statistic =     (please show your answer to 3 decimal places.) The p-value =         (Please show your answer to 4 decimal places.)

The data show the population (in thousands) for a recent year of a sample of cities in South Carolina. 26 26 15 29 69 21 30 29 13 26 20 38 85 19 19 23 29 25 111 47 30 49 108 30 38 Send data to Excel

The average fruit fly will lay 375 eggs into rotting fruit. A biologist wants to see if the average will be greater for flies that have a certain gene modified. The data below shows the number of eggs that were laid into rotting fruit by several fruit flies that had this gene modified. Assume that the distribution of the population is normal. 379, 406, 378, 394, 369, 369, 402, 383, 367, 357, 401, 407, 357, 394, 367 What can be concluded at the the a = 0.05 level of significance level of significance? a. For this study, we should use t-test for a population mean b. The null and alternative hypotheses would be: Ho: H1: C. The test statistic (please show your answer to 3 decimal places.) d. The p-value (Please show your answer %D to 4 decimal places.)

The accompanying table shows the result of a national election along with the vote predicted by several organizations in the days before the election. The sample sizes were typically a bit above 1,000 people, and the reported margin of error was around plus or minus 4 percentage points. The percentages for each poll may not sum to 100 because of voters who indicated they were undecided. Complete parts a through c. Click the icon to view the vote predictions and result. a. The News Network 1 poll predicted that 49% were going to vote for Candidate A, with a margin of error of plus or minus 4%. Explain what this means. Select the correct choice below and fill in the answer boxes to complete your choice. (Type integers or decimals. Do not round.) O A. The true proportion of voters for Candidate A is within percentage points of %. O B. The actual proportion of voters for Candidate A is likely to be more than percentage points away from O C. All samples have a sample proportion that is…

The famous rock group Journey will be featured at the Coliseum. Tickets go on sale immediately. The distribution that would best fit this situation would be:           normal distribution   - platykurtic   - positively skewed    or leptokurtic