A sample of 500 evening students revealed that their annual incomes were normally distributed with a...
A sample of 500 evening students revealed that their annual incomes were normally distributed with a mean income of $50,000 and a standard deviation of $4,000. How many students earned more than $55,000?
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53 |
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197 |
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303 |
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35 |
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None of the choices are correct |
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A sample of 500 evening students revealed that their annual
incomes were normally distributed with a...
xa3 led that their annual incomes from employment n industry during the day were normally distributed...
xa3 led that their annual incomes from employment n industry during the day were normally distributed a standard deviation of $3,000. 14).A sample of 500 evening students revea with a mean income of $30,000 and 5-000 (i) 250 students earned more than $30,000 (ii) 314 students earned between $27,000 and $33,000. (iii) 239 students earned between $24,000 and $30,000. A) and(i) are correct statements but not (ii). (i) and (iii) are correct statements but not (ii). ) and (iii) are...
A sample of 500 part-time studebts revealed that their annual incomes were a mean income of...
A sample of 500 part-time studebts revealed that their annual incomes were a mean income of $30,000 and a standard deviation of $3,000. The number of students who earned more than $36,000 was appendix); remember that the area you are looking for is in the right tail; then apply this area to the normally distributed with Hints: Find the z value (use the Area under the Normal Curve total number of students. Please show how you get the z value....
Example 2.9 In a certain large city, household annual incomes are considered approximately normally distributed with...
Example 2.9 In a certain large city, household annual incomes are considered approximately normally distributed with a mean of s40,o00 and a standard deviation of s6,ooo. What proportion of households in the city have an annual income over $30,0oo? . If a random sample of 6o households were selected, how many of these households would we expect to have annual incomes . between $35,000 and $45,000?
1. (1 point) The ages of students in an evening class is normally distributed with mean...
1. (1 point) The ages of students in an evening class is normally distributed with mean 24 and standard deviation of 7, What fraction of students ages will be within 25 and 30? 256x 30
Scores of 281 students on an exam were normally distributed with the mean 79 and the...
Scores of 281 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 O 15 O 14 Not enough information to answer the question None of the given numerical values is correct 10
Scores of 239 students on an exam were normally distributed with the mean 79 and the...
Scores of 239 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 9 Not enough information to answer the question 12 6 2 3 13 None of the given numerical values is correct
The incomes of trainees at a local mill are normally distributed with a mean of 1210.0...
The incomes of trainees at a local mill are normally distributed with a mean of 1210.0 dollars and a standard deviation of 140.0 dollars. What percentage of trainees earn less than 880.0 dollars a month? SELECT ALL APPLICABLE CHOICES A) B) 0.920807890 99.079 19% C) D) 20.92081% 79.07919% E) F None of These 40.92081% 29 Use the normal distribution to approximate the desired probability. A certain question on a test is answered correctly by 24.0 percent of the respondents. Estimate...
Question 14 2 pt Scores of 166 students on an exam were normally distributed with the...
Question 14 2 pt Scores of 166 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 O1 o O 8 O2 O 6 Not enough information to answ nswer the question None of the given numerical values is correct
College students annual earnings are normally distributed with standard deviation σ-$800. If the mean earning for...
College students annual earnings are normally distributed with standard deviation σ-$800. If the mean earning for gro construct a 95% confidence interval estimate of the mean annual earnings for all college students. 10. up of 64 students is $4000,
Solve the problem. Annual precipitation in a certain city is normally distributed with a mean of...
Solve the problem. Annual precipitation in a certain city is normally distributed with a mean of 99 inches, and a standard deviation of 18 in. Find the probability that the mean annual precipitation during 35 randomly picked years will be less than 101.8 in.? Group of answer choices 0.8212 0.3212 0.9203 0.6788 0.1788
xa3 led that their annual incomes from employment n industry during the day were normally distributed a standard deviation of $3,000. 14).A sample of 500 evening students revea with a mean income of $30,000 and 5-000 (i) 250 students earned more than $30,000 (ii) 314 students earned between $27,000 and $33,000. (iii) 239 students earned between $24,000 and $30,000. A) and(i) are correct statements but not (ii). (i) and (iii) are correct statements but not (ii). ) and (iii) are...
Example 2.9 In a certain large city, household annual incomes are considered approximately normally distributed with a mean of s40,o00 and a standard deviation of s6,ooo. What proportion of households in the city have an annual income over $30,0oo? . If a random sample of 6o households were selected, how many of these households would we expect to have annual incomes . between $35,000 and $45,000?
1. (1 point) The ages of students in an evening class is normally distributed with mean 24 and standard deviation of 7, What fraction of students ages will be within 25 and 30? 256x 30
Scores of 281 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 O 15 O 14 Not enough information to answer the question None of the given numerical values is correct 10
Scores of 239 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 9 Not enough information to answer the question 12 6 2 3 13 None of the given numerical values is correct
The incomes of trainees at a local mill are normally distributed with a mean of 1210.0 dollars and a standard deviation of 140.0 dollars. What percentage of trainees earn less than 880.0 dollars a month? SELECT ALL APPLICABLE CHOICES A) B) 0.920807890 99.079 19% C) D) 20.92081% 79.07919% E) F None of These 40.92081% 29 Use the normal distribution to approximate the desired probability. A certain question on a test is answered correctly by 24.0 percent of the respondents. Estimate...
Question 14 2 pt Scores of 166 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 O1 o O 8 O2 O 6 Not enough information to answ nswer the question None of the given numerical values is correct
College students annual earnings are normally distributed with standard deviation σ-$800. If the mean earning for gro construct a 95% confidence interval estimate of the mean annual earnings for all college students. 10. up of 64 students is $4000,
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