PrActice Suppose that the probability is .4 that chocolate lollipops will fall from the sky on any given day. a) Let X = the number of days during the next 2 days that chocolate lollipops fall from the sky. Write out the full pmf of X in table form. b) Let Y be the number of days during the next 365 days that chocolate lollipops fall from the sky. What is the 75th percentile of Y? Use a normal approximation to the binomial.

The histogram has a longer tail/appears roughly the same/has a longer right tail so the distribution of the data is not skewed/skewed to the left/ skewed to the right

Crossing Ontario Between 1954 and 2003, swimmershave crossed Lake Ontario 43 times. Both women andmen have made the crossing. Here are some plots (we’veomitted a crossing by Vikki Keith, who swam a roundtrip—North to South to North—in 3390 minutes): How much difference is there between the mean amount of time (in minutes) it would take female and male swim-mers to swim the lake? a) Construct and interpret a 95% confidence interval forthe difference between female and male times.b) Comment on the assumptions and conditions.

P-Value means

a population has mean score of 50 if five points are added to each score what is the new mean

Please help with D E F Please Help with D E F

Mitchell is getting ready to take a baseball rules exam in order to becomne certified as a baseball umnpire in his local community. Past scores on the rules exam form a normal distribution with u = 80 and o = 6. Mitchell must score in the highest 25% of the distribution in order to become a certified umpire. Which minimum score does Mitchell need to obtain on the rules exam to become a certified umpire? OX= 76 O X- 84 OX= 86 OX-81

The average American gets a haircut every 34 days. Is the average smaller for college students? The data below shows the results of a survey of 15 college students asking them how many days elapse between haircuts. Assume that the distribution of the population is normal. 35, 23, 32, 38, 31, 39, 35, 25, 30, 36, 40, 27, 23, 32, 25 What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?v Select an answerv Hi: ?vSelect an answerv c. The test statistic ?v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 3 decimal places.) e. The p-value is 2v a f. Based on this, we should Select an answerv the null hypothesis. g. Thus, the final conclusion is that.. O The data suggest the population mean is not significantly lower than 34 at a = 0.10, so there M 24 3. 4. 5 6. 7 EU

Suppose a researcher wants to test if the average diastolic blood pressure in African-Americans is different than the average diastolic blood pressure in the general population. Note that the average diastolic blood pressure in the general population is 70 mmHG. The researcher retains the null hypothesis, so she therefore concludes... Group of answer choices The mean diastolic blood pressure in African-Americans is equal to that of the general population The mean diastolic blood pressure in African-Americans is different than that of the general population

An outlier